Baracus
New member
Have been having major issues with misfires after re-installing the Procede
So after having some work done at BM recently, last weekend I decide to start re-installing some mods, just the Procede and downpipes. However I've now hit a major issue, car is misfiring intermittently when boosting over 10-12 PSI?? Seems especially prominent when temp is still between 80-90C and when doing a logging run from low rpms, and just as boost hits about 10-12psi? When engine is fully warm misfire is intermittent, but when moderately warm sometime misfires actually persist until I switch back to stock or otherwise I have to completely re-start? However once back in stock mode after a restart, car runs perfectly fine without misfire??
I decided to start trouble shooting conservatively with exactly the same maps I had loaded previously, did this for consistency sake as these worked flawlessly before. First thing I did was to pull the plugs, they still look relatively good as I had them replaced 5000Km’s ago and have been running stock since then.
Had a spare coil pack at home so swapped it between cylinders, but misfire codes still appeared in multiple cylinders (see below)?
Logged the car on several runs (logs below), didn’t even reach higher rpm’s on some of them as it was misfiring so badly. Seems AFR’s oscillate/jump to lean when misfires occur (have highlighted with a ring in the below logs), even flat line at 20 when misfires persist?
So the way I see it, it could only be one of the following in order of probability:
- Faulty HP Fuel pump?
- Faulty Injectors ?
- Damaged O2 sensors?
- Plugs (next I’m going to swap these out)?
- Vanos not functioning properly?
- Coil packs?
- Maybe a Procede hardware issue?
Have eliminated bad fuel as I filled up again at a different garage
Any suggestions on what to test/try or log next?
Can anyone out there test and view/adjust the coding of injectors, heard there is something called INPA that can do this? Obviously I can’t take it in to BM while modded, and the problem does not occur when stock
Really don’t want to uninstall the DP’s as they are such a PITA to remove
http://i775.photobucket.com/albums/yy38/Baracus135i/Log412-11-2012.jpg[/IMG
[IMG]http://i775.photobucket.com/albums/yy38/Baracus135i/Log712-11-2012.jpg
So after having some work done at BM recently, last weekend I decide to start re-installing some mods, just the Procede and downpipes. However I've now hit a major issue, car is misfiring intermittently when boosting over 10-12 PSI?? Seems especially prominent when temp is still between 80-90C and when doing a logging run from low rpms, and just as boost hits about 10-12psi? When engine is fully warm misfire is intermittent, but when moderately warm sometime misfires actually persist until I switch back to stock or otherwise I have to completely re-start? However once back in stock mode after a restart, car runs perfectly fine without misfire??
I decided to start trouble shooting conservatively with exactly the same maps I had loaded previously, did this for consistency sake as these worked flawlessly before. First thing I did was to pull the plugs, they still look relatively good as I had them replaced 5000Km’s ago and have been running stock since then.
Had a spare coil pack at home so swapped it between cylinders, but misfire codes still appeared in multiple cylinders (see below)?
Logged the car on several runs (logs below), didn’t even reach higher rpm’s on some of them as it was misfiring so badly. Seems AFR’s oscillate/jump to lean when misfires occur (have highlighted with a ring in the below logs), even flat line at 20 when misfires persist?
So the way I see it, it could only be one of the following in order of probability:
- Faulty HP Fuel pump?
- Faulty Injectors ?
- Damaged O2 sensors?
- Plugs (next I’m going to swap these out)?
- Vanos not functioning properly?
- Coil packs?
- Maybe a Procede hardware issue?
Have eliminated bad fuel as I filled up again at a different garage
Any suggestions on what to test/try or log next?
Can anyone out there test and view/adjust the coding of injectors, heard there is something called INPA that can do this? Obviously I can’t take it in to BM while modded, and the problem does not occur when stock
Really don’t want to uninstall the DP’s as they are such a PITA to remove
http://i775.photobucket.com/albums/yy38/Baracus135i/Log412-11-2012.jpg[/IMG
[IMG]http://i775.photobucket.com/albums/yy38/Baracus135i/Log712-11-2012.jpg
