Misfire after weistec tune
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Joined: Feb 2022
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C63 amg edition 1
Misfire after weistec tune
Hey guys I have a 2018 C63 amg. The car was previously stock but I wanted to tune it and possibly go stage 2 down the road. Immediately after tuning the car I’m getting misfire cyl 1 and then cyl 4. It’s usually at high rpm. I’ve taken the car to weistec twice with no luck. Bought all new coil packs and a fresh set of oem spark plugs gapped to 0.026. Installed with a torque wrench to oem specs. I’ve tried fuel additives and always fill up at top tier gas stations. I still intermittently get a misfire code from different cylinders at high rpm’s. I see a flashing cel with loss of power and rough idle afterwards. Weistec is confident it’s not the tune. Does anyone have further advice? No lean codes or anything else has been read. I want to go stage 2 with catless downpipes but obviously need to solve this issue first. Any advice would be appreciated. Also not blaming weistec the tune feels amazing and they’ve been very responsive and supportive. I’m Just at a loss to what is wrong.
Last edited by domjansson; Feb 20, 2022 at 06:33 PM.
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Joined: Dec 2019
Posts: 1,511
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From: Florida
AMG C63s
Hey guys I have a 2018 C63 amg. The car was previously stock but I wanted to tune it and possibly go stage 2 down the road. Immediately after tuning the car I’m getting misfire cyl 1 and then cyl 4. It’s usually at high rpm. I’ve taken the car to weistec twice with no luck. Bought all new coil packs and a fresh set of oem spark plugs gapped to 0.026. Installed with a torque wrench to oem specs. I’ve tried fuel additives and always fill up at top tier gas stations. I still intermittently get a misfire code from different cylinders at high rpm’s. I see a flashing cel with loss of power and rough idle afterwards. Weistec is confident it’s not the tune. Does anyone have further advice? No lean codes or anything else has been read. I want to go stage 2 with catless downpipes but obviously need to solve this issue first. Any advice would be appreciated
Thread Starter
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Joined: Feb 2022
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C63 amg edition 1
Member
Joined: Oct 2021
Posts: 166
Likes: 26
From: Virginia
C63s Coupe
If it runs fine stock, then it has to be something with the tune. Not trying to bag on Weistec at all. They are very reputable and it sounds like their customer service has been good. But how else can you explain it if it runs fine stock, then misfires with the tune.....
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Joined: Sep 2016
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From: Australia
⏱️ 700HP Facelift converted C63 S Coupe with Drexler 3.06 plated LSD
Hey guys I have a 2018 C63 amg. The car was previously stock but I wanted to tune it and possibly go stage 2 down the road. Immediately after tuning the car I’m getting misfire cyl 1 and then cyl 4. It’s usually at high rpm. I’ve taken the car to weistec twice with no luck. Bought all new coil packs and a fresh set of oem spark plugs gapped to 0.026. Installed with a torque wrench to oem specs. I’ve tried fuel additives and always fill up at top tier gas stations. I still intermittently get a misfire code from different cylinders at high rpm’s. I see a flashing cel with loss of power and rough idle afterwards. Weistec is confident it’s not the tune. Does anyone have further advice? No lean codes or anything else has been read. I want to go stage 2 with catless downpipes but obviously need to solve this issue first. Any advice would be appreciated. Also not blaming weistec the tune feels amazing and they’ve been very responsive and supportive. I’m Just at a loss to what is wrong.
Please give this a go first and if it still plays up look at your coils if they are not new.
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2005 E55
There is a limit where these cars can run on stock downpipes and stock turbos and the first thing that happens is miss fires and plugs going bad.
You might be on the limit on your tuning. I know 3 cars with melted pistons so I would be careful how much boost your tuner is running.
You might be on the limit on your tuning. I know 3 cars with melted pistons so I would be careful how much boost your tuner is running.
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C63 amg edition 1
There is a limit where these cars can run on stock downpipes and stock turbos and the first thing that happens is miss fires and plugs going bad.
You might be on the limit on your tuning. I know 3 cars with melted pistons so I would be careful how much boost your tuner is running.
You might be on the limit on your tuning. I know 3 cars with melted pistons so I would be careful how much boost your tuner is running.
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MBWorld Fanatic!
Joined: Sep 2016
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From: Australia
⏱️ 700HP Facelift converted C63 S Coupe with Drexler 3.06 plated LSD
I’ll drop gap to 0.024 from 0.026 and throw in the catless downpipes I’ve been waiting on and get it retuned. I just wanted to rule out any other possible causes but fuel trims look good and coil packs and plugs are new. I’ll let you guys know what happens maybe things improve 🤷♂️
Thread Starter
Member
Joined: Feb 2022
Posts: 75
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C63 amg edition 1
been running 0.024 for a few days now with catless downpipes, high flow filters, and stage 2 tune. Pulled on a demon from a roll, he didn’t expect it. Car is ridiculously quick and noticeably different with no issues.let’s hope it stays this way.
and for fun here’s my car too! Love it!
Member
Joined: Jun 2021
Posts: 104
Likes: 25
2016 C63 AMG
Hello!
I installed W.1 Tune on my 2016 C63 AMG with 35,000 miles. Car ran perfectly stock. Weistec stated spark plugs gapped 0.022-0.024 and new ignition coils are a good place to start. So I bought new ignition coils and plugs, gapped the plugs to 0.022 as recommended. I still get CEL at high RPM. In 4th gear it crashes the rev limiter if I don't manually shift. Sometimes I still get CEL even if I shift before then.
Weistec recommended purchasing a data logger, HPTuners MPVI2. I was looking at that tuner before I purchased Weistec's Tune. I thought having the professionals tune it would be a better option.
The bottom line is I spent $3K on a professional ECU tune to drive my car slower.
At idle the car does seem to run smoother. Acceleration is noticeably better. The car really hauls until the CEL comes on. Having to pull over, turn the car off and on again makes it not worth it.
I do own Autel MS906TS but it is not a useful tool for tuning, data logging.
For $3K I expected no issues- Plug and play.
I use this car as my daily driver. Weistec stated tune does not affect reliability- Getting a CEL must not be considered a reliability issue, LOL.
I just put the stock tune back on and am headed down to the garage to install fresh set of stock gapped plugs. Weistec stated they charge an 18% restocking fee. Hopefully I get the money back.
I still want the car tuned, I want to add turbo upgrade but leave the pollution control devices intact so the car is legal for street use. I don't want to jeopardize reliability- The car must run correctly 100% of the time without getting CEL.
I rolled the dice with the Weistec Tune and lost- Try your luck.
.
I installed W.1 Tune on my 2016 C63 AMG with 35,000 miles. Car ran perfectly stock. Weistec stated spark plugs gapped 0.022-0.024 and new ignition coils are a good place to start. So I bought new ignition coils and plugs, gapped the plugs to 0.022 as recommended. I still get CEL at high RPM. In 4th gear it crashes the rev limiter if I don't manually shift. Sometimes I still get CEL even if I shift before then.
Weistec recommended purchasing a data logger, HPTuners MPVI2. I was looking at that tuner before I purchased Weistec's Tune. I thought having the professionals tune it would be a better option.
The bottom line is I spent $3K on a professional ECU tune to drive my car slower.
At idle the car does seem to run smoother. Acceleration is noticeably better. The car really hauls until the CEL comes on. Having to pull over, turn the car off and on again makes it not worth it.
I do own Autel MS906TS but it is not a useful tool for tuning, data logging.
For $3K I expected no issues- Plug and play.
I use this car as my daily driver. Weistec stated tune does not affect reliability- Getting a CEL must not be considered a reliability issue, LOL.
I just put the stock tune back on and am headed down to the garage to install fresh set of stock gapped plugs. Weistec stated they charge an 18% restocking fee. Hopefully I get the money back.
I still want the car tuned, I want to add turbo upgrade but leave the pollution control devices intact so the car is legal for street use. I don't want to jeopardize reliability- The car must run correctly 100% of the time without getting CEL.
I rolled the dice with the Weistec Tune and lost- Try your luck.
.
Last edited by anwar_hamoude; Apr 23, 2022 at 07:06 PM.
Thread Starter
Member
Joined: Feb 2022
Posts: 75
Likes: 38
C63 amg edition 1
Hello!
I installed W.1 Tune on my 2016 C63 AMG with 35,000 miles. Car ran perfectly stock. Weistec stated spark plugs gapped 0.022-0.024 and new ignition coils are a good place to start. So I bought new ignition coils and plugs, gapped the plugs to 0.022 as recommended. I still get CEL at high RPM. In 4th gear it crashes the rev limiter if I don't manually shift. Sometimes I still get CEL even if I shift before then.
Weistec recommended purchasing a data logger, HPTuners MPVI2. I was looking at that tuner before I purchased Weistec's Tune. I thought having the professionals tune it would be a better option.
The bottom line is I spent $3K on a professional ECU tune to drive my car slower.
At idle the car does seem to run smoother. Acceleration is noticeably better. The car really hauls until the CEL comes on. Having to pull over, turn the car off and on again makes it not worth it.
I do own Autel MS906TS but it is not a useful tool for tuning, data logging.
For $3K I expected no issues- Plug and play.
I use this car as my daily driver. Weistec stated tune does not affect reliability- Getting a CEL must not be considered a reliability issue, LOL.
I just put the stock tune back on and am headed down to the garage to install fresh set of stock gapped plugs. Weistec stated they charge an 18% restocking fee. Hopefully I get the money back.
I still want the car tuned, I want to add turbo upgrade but leave the pollution control devices intact so the car is legal for street use. I don't want to jeopardize reliability- The car must run correctly 100% of the time without getting CEL.
I rolled the dice with the Weistec Tune and lost- Try your luck.
.
I installed W.1 Tune on my 2016 C63 AMG with 35,000 miles. Car ran perfectly stock. Weistec stated spark plugs gapped 0.022-0.024 and new ignition coils are a good place to start. So I bought new ignition coils and plugs, gapped the plugs to 0.022 as recommended. I still get CEL at high RPM. In 4th gear it crashes the rev limiter if I don't manually shift. Sometimes I still get CEL even if I shift before then.
Weistec recommended purchasing a data logger, HPTuners MPVI2. I was looking at that tuner before I purchased Weistec's Tune. I thought having the professionals tune it would be a better option.
The bottom line is I spent $3K on a professional ECU tune to drive my car slower.
At idle the car does seem to run smoother. Acceleration is noticeably better. The car really hauls until the CEL comes on. Having to pull over, turn the car off and on again makes it not worth it.
I do own Autel MS906TS but it is not a useful tool for tuning, data logging.
For $3K I expected no issues- Plug and play.
I use this car as my daily driver. Weistec stated tune does not affect reliability- Getting a CEL must not be considered a reliability issue, LOL.
I just put the stock tune back on and am headed down to the garage to install fresh set of stock gapped plugs. Weistec stated they charge an 18% restocking fee. Hopefully I get the money back.
I still want the car tuned, I want to add turbo upgrade but leave the pollution control devices intact so the car is legal for street use. I don't want to jeopardize reliability- The car must run correctly 100% of the time without getting CEL.
I rolled the dice with the Weistec Tune and lost- Try your luck.
.
Thread Starter
Member
Joined: Feb 2022
Posts: 75
Likes: 38
C63 amg edition 1
Hello!
I installed W.1 Tune on my 2016 C63 AMG with 35,000 miles. Car ran perfectly stock. Weistec stated spark plugs gapped 0.022-0.024 and new ignition coils are a good place to start. So I bought new ignition coils and plugs, gapped the plugs to 0.022 as recommended. I still get CEL at high RPM. In 4th gear it crashes the rev limiter if I don't manually shift. Sometimes I still get CEL even if I shift before then.
Weistec recommended purchasing a data logger, HPTuners MPVI2. I was looking at that tuner before I purchased Weistec's Tune. I thought having the professionals tune it would be a better option.
The bottom line is I spent $3K on a professional ECU tune to drive my car slower.
At idle the car does seem to run smoother. Acceleration is noticeably better. The car really hauls until the CEL comes on. Having to pull over, turn the car off and on again makes it not worth it.
I do own Autel MS906TS but it is not a useful tool for tuning, data logging.
For $3K I expected no issues- Plug and play.
I use this car as my daily driver. Weistec stated tune does not affect reliability- Getting a CEL must not be considered a reliability issue, LOL.
I just put the stock tune back on and am headed down to the garage to install fresh set of stock gapped plugs. Weistec stated they charge an 18% restocking fee. Hopefully I get the money back.
I still want the car tuned, I want to add turbo upgrade but leave the pollution control devices intact so the car is legal for street use. I don't want to jeopardize reliability- The car must run correctly 100% of the time without getting CEL.
I rolled the dice with the Weistec Tune and lost- Try your luck.
.
I installed W.1 Tune on my 2016 C63 AMG with 35,000 miles. Car ran perfectly stock. Weistec stated spark plugs gapped 0.022-0.024 and new ignition coils are a good place to start. So I bought new ignition coils and plugs, gapped the plugs to 0.022 as recommended. I still get CEL at high RPM. In 4th gear it crashes the rev limiter if I don't manually shift. Sometimes I still get CEL even if I shift before then.
Weistec recommended purchasing a data logger, HPTuners MPVI2. I was looking at that tuner before I purchased Weistec's Tune. I thought having the professionals tune it would be a better option.
The bottom line is I spent $3K on a professional ECU tune to drive my car slower.
At idle the car does seem to run smoother. Acceleration is noticeably better. The car really hauls until the CEL comes on. Having to pull over, turn the car off and on again makes it not worth it.
I do own Autel MS906TS but it is not a useful tool for tuning, data logging.
For $3K I expected no issues- Plug and play.
I use this car as my daily driver. Weistec stated tune does not affect reliability- Getting a CEL must not be considered a reliability issue, LOL.
I just put the stock tune back on and am headed down to the garage to install fresh set of stock gapped plugs. Weistec stated they charge an 18% restocking fee. Hopefully I get the money back.
I still want the car tuned, I want to add turbo upgrade but leave the pollution control devices intact so the car is legal for street use. I don't want to jeopardize reliability- The car must run correctly 100% of the time without getting CEL.
I rolled the dice with the Weistec Tune and lost- Try your luck.
.
Member
Joined: Jun 2021
Posts: 104
Likes: 25
2016 C63 AMG
I'm currently in Minnesota.
I installed the stock tune and a new set of stock gapped spark plugs. It was wet coming home from work this morning so I didn't push it very had. I previously had no issues with the car at stock tune.
It took a long time to get ignition coils. I was running stock tune with no problems on the old coils. When I got the new coils I installed them and a new set of 0.022" gapped spark plugs. Unfortunately running Weistec Tune the CEL comes on- Car misfires.
I wanted to get turbo upgrade also, but car mods are looking very unappealing. I don't have enough income to burn money. Embarrassing as it is I admit I have to work for a living and can't afford to waste money like this. This little adventure has been nothing but a terrible waste of money- I can't waste more. I have to give up.
.
Member
Joined: Apr 2017
Posts: 174
Likes: 60
From: Miami
C63s Sedan
Hello!
I installed W.1 Tune on my 2016 C63 AMG with 35,000 miles. Car ran perfectly stock. Weistec stated spark plugs gapped 0.022-0.024 and new ignition coils are a good place to start. So I bought new ignition coils and plugs, gapped the plugs to 0.022 as recommended. I still get CEL at high RPM. In 4th gear it crashes the rev limiter if I don't manually shift. Sometimes I still get CEL even if I shift before then.
Weistec recommended purchasing a data logger, HPTuners MPVI2. I was looking at that tuner before I purchased Weistec's Tune. I thought having the professionals tune it would be a better option.
The bottom line is I spent $3K on a professional ECU tune to drive my car slower.
At idle the car does seem to run smoother. Acceleration is noticeably better. The car really hauls until the CEL comes on. Having to pull over, turn the car off and on again makes it not worth it.
I do own Autel MS906TS but it is not a useful tool for tuning, data logging.
For $3K I expected no issues- Plug and play.
I use this car as my daily driver. Weistec stated tune does not affect reliability- Getting a CEL must not be considered a reliability issue, LOL.
I just put the stock tune back on and am headed down to the garage to install fresh set of stock gapped plugs. Weistec stated they charge an 18% restocking fee. Hopefully I get the money back.
I still want the car tuned, I want to add turbo upgrade but leave the pollution control devices intact so the car is legal for street use. I don't want to jeopardize reliability- The car must run correctly 100% of the time without getting CEL.
I rolled the dice with the Weistec Tune and lost- Try your luck.
.
I installed W.1 Tune on my 2016 C63 AMG with 35,000 miles. Car ran perfectly stock. Weistec stated spark plugs gapped 0.022-0.024 and new ignition coils are a good place to start. So I bought new ignition coils and plugs, gapped the plugs to 0.022 as recommended. I still get CEL at high RPM. In 4th gear it crashes the rev limiter if I don't manually shift. Sometimes I still get CEL even if I shift before then.
Weistec recommended purchasing a data logger, HPTuners MPVI2. I was looking at that tuner before I purchased Weistec's Tune. I thought having the professionals tune it would be a better option.
The bottom line is I spent $3K on a professional ECU tune to drive my car slower.
At idle the car does seem to run smoother. Acceleration is noticeably better. The car really hauls until the CEL comes on. Having to pull over, turn the car off and on again makes it not worth it.
I do own Autel MS906TS but it is not a useful tool for tuning, data logging.
For $3K I expected no issues- Plug and play.
I use this car as my daily driver. Weistec stated tune does not affect reliability- Getting a CEL must not be considered a reliability issue, LOL.
I just put the stock tune back on and am headed down to the garage to install fresh set of stock gapped plugs. Weistec stated they charge an 18% restocking fee. Hopefully I get the money back.
I still want the car tuned, I want to add turbo upgrade but leave the pollution control devices intact so the car is legal for street use. I don't want to jeopardize reliability- The car must run correctly 100% of the time without getting CEL.
I rolled the dice with the Weistec Tune and lost- Try your luck.
.
I'm still trying to work with them to get it as fast as other cars on Dragy that are stage 2 with stock turbos.
I'm guessing these cars can't just use an off the shelf tune, it requires some revisions for each car.
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Joined: Jul 2011
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2019 AMG GT R
is it safe to say that renntech is the only company that offers a fully reliable tune? I think ive read some horror stories from forum members with pretty much every other tuner out there except for renntech?
Last edited by untamedd; Apr 25, 2022 at 12:31 AM.
Member
Joined: Jun 2021
Posts: 104
Likes: 25
2016 C63 AMG
I did everything you did and got misfires. I then had PTG lower the timing on my stage 2 tune and I got no more misfires, its maybe .3-.8 seconds slower on my 60-130 times though.
I'm still trying to work with them to get it as fast as other cars on Dragy that are stage 2 with stock turbos.
I'm guessing these cars can't just use an off the shelf tune, it requires some revisions for each car.
I'm still trying to work with them to get it as fast as other cars on Dragy that are stage 2 with stock turbos.
I'm guessing these cars can't just use an off the shelf tune, it requires some revisions for each car.
Timing curve advanced too far- Makes perfect sense to me. I observed knock sensor causing CEL using live monitoring on my Autel MS906TS. I am not a professional technician. I am in the learning process, I'm definitely not an expert technician or tuning expert. I was under the belief that the knock sensor was picking up misfires. Maybe some of the time it was.
Weistec directed me to pick up data logging tool, HP Tuners MPVI2. I googled and watched some videos. Honestly I just wanted to pay the money to have the upgrade and and not invest all this time learning about the details. Now what comes to mind is if I want the car tuned I might as well buy MPVI2+ and tune it myself.
0.022" gap plugs with a couple hundred miles.
.
Member
Joined: Oct 2021
Posts: 166
Likes: 26
From: Virginia
C63s Coupe
Plug and play.
I have no idea how it compares performance wise 60-120, 0-60, dyno numbers, etc...however I can say so far its been flawless and car feels simply rowdy and so much fun to drive.
I'm assuming because its a standard tune it may not be as aggressive as some of these other companies, but maybe that's what makes it safer? easier? more reliable?
I don't know, just throwing it out there. I don't have any experience with anything else being this is my first German performance vehicle.
Member
Joined: Jun 2021
Posts: 104
Likes: 25
2016 C63 AMG
I emailed Renntech an inquiry. Renntech stated 2 year warranty on parts, no software issues. The cost for turbo upgrade is a little more than I want to spend. Swapping out the stock turbos for Pure 900 Turbos and tuning the car myself with HP Tuners MPVI2+ at 1/3 the cost might be my solution. For tune only I should have gone with Renntech. I would much rather be 3/10ths slower and not have CEL.
.
.
Super Member
Joined: Dec 2019
Posts: 551
Likes: 133
From: Miami, Florida
W205 C63 AMG Coupe
I emailed Renntech an inquiry. Renntech stated 2 year warranty on parts, no software issues. The cost for turbo upgrade is a little more than I want to spend. Swapping out the stock turbos for Pure 900 Turbos and tuning the car myself with HP Tuners MPVI2+ at 1/3 the cost might be my solution. For tune only I should have gone with Renntech. I would much rather be 3/10ths slower and not have CEL.
.
.
Thread Starter
Member
Joined: Feb 2022
Posts: 75
Likes: 38
C63 amg edition 1
I did everything you did and got misfires. I then had PTG lower the timing on my stage 2 tune and I got no more misfires, its maybe .3-.8 seconds slower on my 60-130 times though.
I'm still trying to work with them to get it as fast as other cars on Dragy that are stage 2 with stock turbos.
I'm guessing these cars can't just use an off the shelf tune, it requires some revisions for each car.
I'm still trying to work with them to get it as fast as other cars on Dragy that are stage 2 with stock turbos.
I'm guessing these cars can't just use an off the shelf tune, it requires some revisions for each car.
Member
Joined: Apr 2017
Posts: 174
Likes: 60
From: Miami
C63s Sedan
weistec will be plug and play if the car is operating in perfect mechanical order and the octane you are using is appropriate and not under rated. I was using octane booster and burning through plugs to not misfire. Found the source and fixed the problem. Weistec proved on a dyno the car misfired or had knock on stock tune (without CEL) and on theirs. Meaning it was a mechanical fault. My car now runs flawlessly. 🤷♂️
Member
Joined: Jun 2021
Posts: 104
Likes: 25
2016 C63 AMG
Based on some posts I have seen from you, I would strongly advise against you attempting to tune your own car. Unless you have significant experience doing this, you are very likely to cause damage to your engine. Find a reputable shop that can dyno tune or street tune your specific car instead of using an off-the-shelf tune and you should be satisfied.
I watched a few tutorials on HP Tuners MPVI2+. Weistec recommended the device for diagnostics. I am not a professional technician and I've never done tuning, but its not rocket science. I'm not a slow learner. So, I would have to say challenge accepted. People that attempt to try dissuading me from learning something usually have a vested interest in hoarding the knowledge. I will surly document the results on the forum and encourage others to do their own tuning.
.
