Misfire 5,6,7
Thread Starter
Member
Joined: May 2008
Posts: 148
Likes: 1
From: Calgary Alberta Canada
03 Silver E55
Misfire 5,6,7
Well gents.
For the past few weeks I have been having some random misfires. There isnt one specific thing that I am doing to cause the misfires, and they do not happen every time I drive the car.
Two weeks ago, at the track, at the end of the run the while downshifting the car made a loud exhaust noise and the check engine light came on. Cylinder 5 misfire.
Last week, driving down the highway just cruising and all of a sudden is sounded like a helicopter was above me, check engine light came on. Tried to accelerate car fell flat on its face, so I pulled over shut her down, looked around saw nothing wrong. Fired her back up and she drove fine. Code said cylinder 5,6,7 misfire.
Today, I was cruising with my parents in the car, and it repeated last weeks behavior. I haven't checked the code yet, I will check and post the exact code tomorrow. However I am willing to bet 5,6,7 misfire.
Mods:
MB 80mm tb
Cooling mist Water injection (windshield washer fluid with 2 cap fulls of meth)
FF Long tubes
Eurocharged tune
Could you gent help me narrow down where to look?
When doing a compression check should it be done WOT?
Need ideas, my drag setup arrived yesterday, so I would like to resolve this before Friday night.
Thanks
For the past few weeks I have been having some random misfires. There isnt one specific thing that I am doing to cause the misfires, and they do not happen every time I drive the car.
Two weeks ago, at the track, at the end of the run the while downshifting the car made a loud exhaust noise and the check engine light came on. Cylinder 5 misfire.
Last week, driving down the highway just cruising and all of a sudden is sounded like a helicopter was above me, check engine light came on. Tried to accelerate car fell flat on its face, so I pulled over shut her down, looked around saw nothing wrong. Fired her back up and she drove fine. Code said cylinder 5,6,7 misfire.
Today, I was cruising with my parents in the car, and it repeated last weeks behavior. I haven't checked the code yet, I will check and post the exact code tomorrow. However I am willing to bet 5,6,7 misfire.
Mods:
MB 80mm tb
Cooling mist Water injection (windshield washer fluid with 2 cap fulls of meth)
FF Long tubes
Eurocharged tune
Could you gent help me narrow down where to look?
When doing a compression check should it be done WOT?
Need ideas, my drag setup arrived yesterday, so I would like to resolve this before Friday night.
Thanks
Thread Starter
Member
Joined: May 2008
Posts: 148
Likes: 1
From: Calgary Alberta Canada
03 Silver E55
Washer fluid is perfectly fine. We have been through this and I and many others have been using it for ages. I am not spraying it for power, but for temp control.
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From: Chicagoland
AMG
Thread Starter
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Joined: May 2008
Posts: 148
Likes: 1
From: Calgary Alberta Canada
03 Silver E55
No cats on this car, actually she runs open header most of the time.
The plugs were replaced before winter, and I have pulled them. I was thinking of going one step colder, as one of them does appear to have hot spots.
The plugs were replaced before winter, and I have pulled them. I was thinking of going one step colder, as one of them does appear to have hot spots.
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From: SOCAL
2004 E55
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From: Puerto Rico
2005 E55 AMG
Meth is pretty hard on spark plugs...at least the times I've used it my plugs life expectancy would go down considerably. Check your plugs...maybe they just need to be swapped out.
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MBWorld Fanatic!
Joined: Jul 2005
Posts: 3,174
Likes: 19
From: London, UK
No longer stock '06 E55, A3 3.2 Quattro, GLE 400d, R107 280SL, Golf Polo
Similar story 5/7 misfire with aquamist, but not under wot ... More on trailing throttle... Think some water pooling occurs during wot runs and when you come off the power quickly the remaining water gets dragged in when not needed... My theory anyway...
I got brand new one step colder plugs plus only use water and no meth
I got brand new one step colder plugs plus only use water and no meth
Last edited by stevebez; May 30, 2011 at 05:43 AM.
Thread Starter
Member
Joined: May 2008
Posts: 148
Likes: 1
From: Calgary Alberta Canada
03 Silver E55
codes are as follows:
p2098 bank 2 fuel trim too lean
p0134 02 no activity
p0135 02 no activity
surpirsed me no misfires. going to ask jerry to retune and see what haapens.
p2098 bank 2 fuel trim too lean
p0134 02 no activity
p0135 02 no activity
surpirsed me no misfires. going to ask jerry to retune and see what haapens.
Last edited by Tibi; May 30, 2011 at 11:11 PM.
MBWorld Fanatic!
Joined: Jul 2005
Posts: 3,174
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From: London, UK
No longer stock '06 E55, A3 3.2 Quattro, GLE 400d, R107 280SL, Golf Polo
Hmm ...
different codes to mine...
I got P0305 P0307 (5 & 7 misfire)
P0300 general misfire.
Closed loop, 18-34% engine load. Fuel trims on left bank out of wack. I think water meth in conjunction with deleted primary O2 (no primary cat) making ECU wobble a bit.
Where are you injecting the water/meth in the airflowstream ? I have tapped two location one just after I/C and one just infront of I/C after S/C. At mom I am using the latter location only.
I can manually activate / deactivate the water injection, and think I need to deactivate it during a WOT burst to purge any remaining water residue and then see if it still comes back. If it comes back after that then its something else thats going on with A/F measurement in closed loop.
When I took off the surge tanks to paint they were all nice and clean inside
different codes to mine...
I got P0305 P0307 (5 & 7 misfire)
P0300 general misfire.
Closed loop, 18-34% engine load. Fuel trims on left bank out of wack. I think water meth in conjunction with deleted primary O2 (no primary cat) making ECU wobble a bit.
Where are you injecting the water/meth in the airflowstream ? I have tapped two location one just after I/C and one just infront of I/C after S/C. At mom I am using the latter location only.
I can manually activate / deactivate the water injection, and think I need to deactivate it during a WOT burst to purge any remaining water residue and then see if it still comes back. If it comes back after that then its something else thats going on with A/F measurement in closed loop.
When I took off the surge tanks to paint they were all nice and clean inside
MBWorld Fanatic!
Joined: Jul 2005
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From: London, UK
No longer stock '06 E55, A3 3.2 Quattro, GLE 400d, R107 280SL, Golf Polo
Thread Starter
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Joined: May 2008
Posts: 148
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From: Calgary Alberta Canada
03 Silver E55
I am spraying it right after the intercooler core. My problems arent after wide open pulls. The last two check engine lights seem to occur when just cruising with cruise control on and no load. My meth only sprays under load at the top of 3rd thru 5th.
Jerry mentioned that it could be an exhaust leak, so this evening Im going to look at my header install and make sure all gaskets are still intact and that nothings leaking.
Jerry mentioned that it could be an exhaust leak, so this evening Im going to look at my header install and make sure all gaskets are still intact and that nothings leaking.
MBWorld Fanatic!
Joined: Jul 2005
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From: London, UK
No longer stock '06 E55, A3 3.2 Quattro, GLE 400d, R107 280SL, Golf Polo
Hmm I woud have thought you would have heard a leak .. mbe its the o2's ?
I had a leak on the opposite bank, but sorted that now, and now I get the errors on the other side... wierd!
I had a leak on the opposite bank, but sorted that now, and now I get the errors on the other side... wierd!
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Joined: Sep 2002
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From: West
2005 E55 Wagon
I am spraying it right after the intercooler core. My problems arent after wide open pulls. The last two check engine lights seem to occur when just cruising with cruise control on and no load. My meth only sprays under load at the top of 3rd thru 5th.
Jerry mentioned that it could be an exhaust leak, so this evening Im going to look at my header install and make sure all gaskets are still intact and that nothings leaking.
Jerry mentioned that it could be an exhaust leak, so this evening Im going to look at my header install and make sure all gaskets are still intact and that nothings leaking.
Thread Starter
Member
Joined: May 2008
Posts: 148
Likes: 1
From: Calgary Alberta Canada
03 Silver E55
After speaking with Jerry and he recommending I check to make sure I didn't have an exhaust leak, I pulled the header flanges off and inspected all the gaskets and reinstalled. I also tested all my 02 sensors, and cleaned the connections.
Now things got worst. I am still getting the p2098 (post catalyst fuel trim too lean, bank 2), as well as 02 sensor 1, bank 1 (new code), and both rear no activity, and now rear 02 heater circuit.
When I use the code reader and watch the live data feed. Bank 1 & 2 primary sensors are working, the secondaries both show 0 (assume they should since they were turned off), and my long term fuel trim for bank 1 is 2.3 and bank 2 is 0.
I need ideas even shots in the dark like, take some air out of your tire or top off your coolant. I don't know where to go, maybe just buy new sensors and see what happens.
Thanks Gents
Now things got worst. I am still getting the p2098 (post catalyst fuel trim too lean, bank 2), as well as 02 sensor 1, bank 1 (new code), and both rear no activity, and now rear 02 heater circuit.
When I use the code reader and watch the live data feed. Bank 1 & 2 primary sensors are working, the secondaries both show 0 (assume they should since they were turned off), and my long term fuel trim for bank 1 is 2.3 and bank 2 is 0.
I need ideas even shots in the dark like, take some air out of your tire or top off your coolant. I don't know where to go, maybe just buy new sensors and see what happens.
Thanks Gents
Thread Starter
Member
Joined: May 2008
Posts: 148
Likes: 1
From: Calgary Alberta Canada
03 Silver E55
No jumpstart, battery replaced both batteries in the fall, and I reset (disconnected battery) the ecu this week while checking the headers.
Forgot to mention, with the code reader plugged in, the first warning did not pop up until 30ish mins into my drive today. Check engine light came on about 5 mins later. I don't know if that means anything.
Forgot to mention, with the code reader plugged in, the first warning did not pop up until 30ish mins into my drive today. Check engine light came on about 5 mins later. I don't know if that means anything.
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From: Long Island, NY
Whatever we're tuning!
When you spray after the intercooler your nozzle is most likely directly across from the MAP sensor and about 3" from the IAT sensor, correct? The nozzle should be before the intercooler core since then it will have enough time to atomize and not cause MAP and IAT sensor failures prematurely. That is the best spot for the nozzle. What size nozzle are you using 5 or 7?
1 step colder plugs is a great idea to pull some heat out of the combustion chamber.
I would definitely get this resolved before going to the track.
GL with finding the issue. Steve's suggestion about swapping the O2's is a great start.
Thread Starter
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Joined: May 2008
Posts: 148
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From: Calgary Alberta Canada
03 Silver E55
Thread Starter
Member
Joined: May 2008
Posts: 148
Likes: 1
From: Calgary Alberta Canada
03 Silver E55
Did you try to turn the meth off and see if the problem persists?
When you spray after the intercooler your nozzle is most likely directly across from the MAP sensor and about 3" from the IAT sensor, correct? The nozzle should be before the intercooler core since then it will have enough time to atomize and not cause MAP and IAT sensor failures prematurely. That is the best spot for the nozzle. What size nozzle are you using 5 or 7?
1 step colder plugs is a great idea to pull some heat out of the combustion chamber.
I would definitely get this resolved before going to the track.
GL with finding the issue. Steve's suggestion about swapping the O2's is a great start.
When you spray after the intercooler your nozzle is most likely directly across from the MAP sensor and about 3" from the IAT sensor, correct? The nozzle should be before the intercooler core since then it will have enough time to atomize and not cause MAP and IAT sensor failures prematurely. That is the best spot for the nozzle. What size nozzle are you using 5 or 7?
1 step colder plugs is a great idea to pull some heat out of the combustion chamber.
I would definitely get this resolved before going to the track.
GL with finding the issue. Steve's suggestion about swapping the O2's is a great start.
