Car going into limp mode (mods : racechip)
Thread Starter
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Joined: Jun 2019
Posts: 79
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From: Iran
Glc43
Car going into limp mode (mods : racechip)
Hello everyone
i have a glc43 amg and have been riding it for two years without any problems at all until recently which car goes into limp mode every now and then
When I bring up the AMG menu it doesn’t show any boost and car accelerates much less than normal. And also there’s a racechip installed on the car as well.
any ideas 💡?
i have a glc43 amg and have been riding it for two years without any problems at all until recently which car goes into limp mode every now and then
When I bring up the AMG menu it doesn’t show any boost and car accelerates much less than normal. And also there’s a racechip installed on the car as well.
any ideas 💡?
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Joined: Nov 2018
Posts: 338
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GLC 63 AMG, Trackhawk, X3M
they are located under the airboxes running under the spark plugs on both sides of you can take a look and see.
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AMG GLC 63s Coupe
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GLC 63 AMG, Trackhawk, X3M
Are you able to take logs with the race chip? Id say if it is possible to do so and see what is crashing/failing under the parameters.
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Joined: Jun 2019
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From: Iran
Glc43
@KingMonkeyJr sry mate, I can’t
but I forgot to say when this happens “A” button , eco start/stop function is disabled! I can now predict when this “limp mode” thing gonna happen! Before happening it seems the car is choking on something then suddenly turbo shuts down but no noise etc
but I forgot to say when this happens “A” button , eco start/stop function is disabled! I can now predict when this “limp mode” thing gonna happen! Before happening it seems the car is choking on something then suddenly turbo shuts down but no noise etc
Senior Member
Joined: Nov 2018
Posts: 338
Likes: 73
GLC 63 AMG, Trackhawk, X3M
@KingMonkeyJr sry mate, I can’t
but I forgot to say when this happens “A” button , eco start/stop function is disabled! I can now predict when this “limp mode” thing gonna happen! Before happening it seems the car is choking on something then suddenly turbo shuts down but no noise etc
but I forgot to say when this happens “A” button , eco start/stop function is disabled! I can now predict when this “limp mode” thing gonna happen! Before happening it seems the car is choking on something then suddenly turbo shuts down but no noise etc
Thread Starter
Member
Joined: Jun 2019
Posts: 79
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From: Iran
Glc43
@KingMonkeyJr i removed the racechip and now it’s ok! The question is why such a thing has not happened through a year and half and it’s happening too often all of a sudden?! And yes during full throttle
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Joined: Oct 2018
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From: Massachusetts
Blk/Blk GLC43 AMG WAGON
Ever since my shop (reputable shop up here in the NE) told me these engines (43's) do not like the boost cranked up aggressively I was super cautious and have since backed off until I am ready
to have professionals spend the time they need for my individual car. Too much **** can go wrong with these complicated engines it just makes me so leery of ****ing around with it in the first place.
Last thing I want to do is be holding the bag on a roached engine.
to have professionals spend the time they need for my individual car. Too much **** can go wrong with these complicated engines it just makes me so leery of ****ing around with it in the first place.
Last thing I want to do is be holding the bag on a roached engine.
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Joined: Jun 2019
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From: Iran
Glc43
@affalterthought yes plus a pair of bmc air filters which I removed recently. I haven’t had this problem until recently which is happening frequently now after a year and half of racechip installation. That’s what bugs me right now
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GLC 63 AMG, Trackhawk, X3M
@affalterthought yes plus a pair of bmc air filters which I removed recently. I haven’t had this problem until recently which is happening frequently now after a year and half of racechip installation. That’s what bugs me right now
Also one question what settings on the race chip are there? Boost parameters?
The cars are sensitive as the LPFP seems to have the voltage toned down quite a bit. I am pushing 23psi right now and having no fuel issues with my new tuner.
Oh also running E50 currently and working on a E85 tune with them as well. Thing is a monster!
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GLC 63 AMG, Trackhawk, X3M
After reading a little I think it is your Boost Manifold Sensor. It could either be faulty from the Racechip or faulty from factory. Id reach out to racechip and see if they can send you a replacement to see if that fixes it. If it doesnt then Id assume taking it to dealer.
After reading a little more seems like this happens to a couple people. Looked through the Bmw forums and a couple guys said the same thing. After driving one year they were going limp mode. I would think it is the Racechip itself maybe got a spark when the car was turned on and screwed the sensor.
Do yourself a favor and get a Tune. It is so easy nowadays with the OBD2 access.
After reading a little more seems like this happens to a couple people. Looked through the Bmw forums and a couple guys said the same thing. After driving one year they were going limp mode. I would think it is the Racechip itself maybe got a spark when the car was turned on and screwed the sensor.
Do yourself a favor and get a Tune. It is so easy nowadays with the OBD2 access.
Last edited by KingMonkeyJr; Oct 25, 2019 at 05:16 PM.
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Blk/Blk GLC43 AMG WAGON
Man I would do the exact opposite of running to the dealership. Seems risky IMO. I would find a reputable tuner who knows these cars just as well as any MB certified tech. I would not want some MB tech sniffing around who might find some log / files. Then you are literally at the mercy of the tech and that dealership. If they are cool, no sweat; if not you are fu#$%ng toast. Warranty no bueno. I don't know maybe I am over thinking things.
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From: Portland, OR
C450, GLC43
@KingMonkeyJr i removed the racechip and now it’s ok! The question is why such a thing has not happened through a year and half and it’s happening too often all of a sudden?! And yes during full throttle
Loose cnxn at the boost sensor clip is a pretty frequent cause for issues similar issues with piggy backs. The clip is a little tricky.
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From: Portland, OR
C450, GLC43
Man I would do the exact opposite of running to the dealership. Seems risky IMO. I would find a reputable tuner who knows these cars just as well as any MB certified tech. I would not want some MB tech sniffing around who might find some log / files. Then you are literally at the mercy of the tech and that dealership. If they are cool, no sweat; if not you are fu#$%ng toast. Warranty no bueno. I don't know maybe I am over thinking things.
But most importantly, the dealer won't really do anything to help.
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From: Portland, OR
C450, GLC43
I disagree. Racechip and Dinan are really mild tunes that are safe for most applications. BMS JB4 is more powderful but also has more safety features baked in. This can't be said for all the canned ECU flashes out on the market right now. Some are great and others not so much. There really isn't any reason to get an ECU tune unless you are going stage 2 or beyond or if you really want to add a burble tune to a car that doesn't have it stock.
For cars running stock + tune, a piggy is the best option. And JB4 is the best of the piggies.
Now if you're building a heavily modified beast like Kingmonkey Jr, a custom ECU flash is really the only option. But his ride is a Unicorn. You're not going to find many beasts like that out in the wild.
