|
|
|
|
|
|
BMW Garage | BMW Meets | Register | Today's Posts | Search |
|
BMW 3-Series (E90 E92) Forum
>
Misfire at 15lbs
|
|
02-15-2015, 07:15 AM | #1 |
Instagram @kyle_e92
13
Rep 187
Posts
Drives: e92 335xi
Join Date: Sep 2013
Location: Ephrata, PA
|
Misfire at 15lbs
I've been having a problem when I have my jb4 on map 1,2,5 and the car hits 15lbs it falls on its face and has a misfire. Once I turn the car off and then turn jt back on its fine. The misfire changes from cylinder to cylinder when it happens. Plugs were changed with oem bosche.
I took it to the dealer stock and that was a lose cause cause they couldn't make the misfire happen seeing it would only happen when the car hits approx 15lbs which doesn't happen stock. Thinking maybe the map sensor is failing? The car runs no problems under WOT with the jb4 off on stock 5lbs. I cleaned the sensor off and tried it and that didn't help. Possibly it's failing under the amount of pressure? I don't just wanna start throwing money at random parts. Thought I would see what other people may think or if anyone had the same issue.
__________________
6MT l AWD l MHD l DCI l VRSF DP l ECS BOV l CUSTOM 3" CATBACK l 7" VRSF intercooler l H&R Coilovers |
02-15-2015, 07:22 AM | #2 |
Major
380
Rep 1,497
Posts |
Spark plugs, Ignition coil, fuel injector. From cheapest to expensive. I had a same issue. Replaced the oem Bosch with ngk step colder plugs and problem fixed. Seems to me that plugs last between to 8k to 12k depending on hard you drive the car.
|
Appreciate
0
|
02-15-2015, 07:27 AM | #3 | |
Instagram @kyle_e92
13
Rep 187
Posts
Drives: e92 335xi
Join Date: Sep 2013
Location: Ephrata, PA
|
Quote:
__________________
6MT l AWD l MHD l DCI l VRSF DP l ECS BOV l CUSTOM 3" CATBACK l 7" VRSF intercooler l H&R Coilovers |
|
Appreciate
0
|
02-15-2015, 09:28 AM | #4 |
Major
380
Rep 1,497
Posts |
U can try getting race gas or e85. See if higher octane will fix it. This way you can eliminate gas being a cause.
Did you ever get the valve cover fixed? If it's covering the spark plugs in oil that sounds like your problem. I had exactly the same issue. Get some better plugs and see what happens. Step colder is what I recommend and been running for over a year |
Appreciate
0
|
02-15-2015, 01:36 PM | #5 | |
Instagram @kyle_e92
13
Rep 187
Posts
Drives: e92 335xi
Join Date: Sep 2013
Location: Ephrata, PA
|
Quote:
__________________
6MT l AWD l MHD l DCI l VRSF DP l ECS BOV l CUSTOM 3" CATBACK l 7" VRSF intercooler l H&R Coilovers |
|
Appreciate
0
|
02-15-2015, 02:43 PM | #6 |
Private First Class
20
Rep 167
Posts |
My car is sitting at the dealer right now being fixed as I type this. The issue I had seems very similar to you. Only on WOT my car would get a misfire boosting around 15psi. I thought initially that it was a bad coil or something and mentioned it to the dealer. Well they had a hard time figuring it out (took them around three days) but it was a bad low pressure fuel sensor. Will hopefully get the car back Monday and it "should" be good to go....maybe that is your issue
|
Appreciate
0
|
02-15-2015, 03:14 PM | #7 | |
Colonel
352
Rep 2,050
Posts |
Quote:
I suggest I start reading codes and swapping sparks and coils. If that doesn't work get ready to spend $$ on injectors. You said ur valve cover gasket is leaking too. I seen that cause misfires. Why not fix that ?
__________________
'10 e92 N54
DCI intakes, ER chargepipe, TIAL BOV, VRSF 5in FMIC, BMS Downpipes COBB e30 |
|
Appreciate
0
|
02-15-2015, 03:15 PM | #8 | |
Instagram @kyle_e92
13
Rep 187
Posts
Drives: e92 335xi
Join Date: Sep 2013
Location: Ephrata, PA
|
Quote:
__________________
6MT l AWD l MHD l DCI l VRSF DP l ECS BOV l CUSTOM 3" CATBACK l 7" VRSF intercooler l H&R Coilovers |
|
Appreciate
0
|
02-15-2015, 03:20 PM | #9 | |
Lieutenant
148
Rep 563
Posts |
Quote:
|
|
Appreciate
0
|
02-15-2015, 03:32 PM | #10 | ||
Instagram @kyle_e92
13
Rep 187
Posts
Drives: e92 335xi
Join Date: Sep 2013
Location: Ephrata, PA
|
Quote:
__________________
6MT l AWD l MHD l DCI l VRSF DP l ECS BOV l CUSTOM 3" CATBACK l 7" VRSF intercooler l H&R Coilovers |
||
Appreciate
0
|
02-15-2015, 03:36 PM | #11 |
Lieutenant
148
Rep 563
Posts |
Try swapping 2 coils around and see if the problem follows? Or just buy a spare ignition coil at the dealer. I have 2 extras. Cylinder 5 was always the one that would miss fire so after putting a new coil on that i haven't had a problem since.
|
Appreciate
0
|
02-15-2015, 03:47 PM | #13 | |
Private First Class
20
Rep 167
Posts |
Quote:
|
|
Appreciate
0
|
02-15-2015, 03:50 PM | #14 | |
Instagram @kyle_e92
13
Rep 187
Posts
Drives: e92 335xi
Join Date: Sep 2013
Location: Ephrata, PA
|
Quote:
__________________
6MT l AWD l MHD l DCI l VRSF DP l ECS BOV l CUSTOM 3" CATBACK l 7" VRSF intercooler l H&R Coilovers |
|
Appreciate
0
|
02-15-2015, 03:51 PM | #15 | ||
Instagram @kyle_e92
13
Rep 187
Posts
Drives: e92 335xi
Join Date: Sep 2013
Location: Ephrata, PA
|
Quote:
__________________
6MT l AWD l MHD l DCI l VRSF DP l ECS BOV l CUSTOM 3" CATBACK l 7" VRSF intercooler l H&R Coilovers |
||
Appreciate
0
|
02-15-2015, 05:17 PM | #16 |
Major
380
Rep 1,497
Posts |
|
Appreciate
0
|
02-15-2015, 05:23 PM | #17 |
Instagram @kyle_e92
13
Rep 187
Posts
Drives: e92 335xi
Join Date: Sep 2013
Location: Ephrata, PA
|
Drives badly yes. Idling not sure. I never let it idle when it happens I turn it off right away. When I accelerate its bad and has practical no power.
__________________
6MT l AWD l MHD l DCI l VRSF DP l ECS BOV l CUSTOM 3" CATBACK l 7" VRSF intercooler l H&R Coilovers |
Appreciate
0
|
Bookmarks |
|
|