|
|
|
|
|
|
BMW Garage | BMW Meets | Register | Today's Posts | Search |
|
BMW 3-Series (E90 E92) Forum
>
Bad Injectors ?
|
|
04-18-2017, 06:42 PM | #1 |
Private
6
Rep 72
Posts |
Bad Injectors ?
Wondering if my 2009 335i X-Drive has some bad injectors.
Symptoms: Cold start misfire After a few minutes, as car is misfiring hard, if I turn the car off, wait 15 seconds, then turn it back on it no longer misfires DME code for misfire on basically every cylinder White smoke out of exhaust Almost evident that car isn't putting out full power, has almost decreased over time Was forced to drive the car while it was misfiring twice (before I figured out if I "reset" the car it will stop), and once I shift into second gear (car is auto but driven in steptronic) and hit ~3k rpm, the car dropped into limp mode. When finally stopped, the misfires were horrible and the car's shakes were violent. Have already replaced spark plugs and coils, as that was first idea. Just had a walnut blast, index of injectors is 5 or 6. Misfire still has not gone away. Is this more than likely my injectors? Is the best option to just buy a set of index 12's? |
04-18-2017, 08:50 PM | #2 |
Second Lieutenant
94
Rep 233
Posts |
Yeah sounds like a classic case of leaky injectors. One thing I've heard you can do is log AFRs after you let off the gas; this should immediately jump to some very high number (no fuel ideally) for both banks, but if you see noticeable differences between banks or see the numbers slowly increasing then it can be a confirmation of leaky injectors. Note: I've never tried this, and if you don't see this behavior then it does not rule out injectors as being the culprit
__________________
2010 BSM 335i 6MT M-Sport w/ MMP Stage 3 Turbos
|
Appreciate
0
|
04-18-2017, 10:20 PM | #3 |
Second Lieutenant
102
Rep 235
Posts |
Definitely sounds like injectors. Take off engine cover and coils, pull spark plugs one by one and check for a plug soaked in fuel or fouled (covered in carbon). That is the offending injector if you find a plug like that.
I have a 2010 and I have an extended warranty on my injectors for 10 years/120k miles. If you'recovered, BMW will replace for free, if not pay an Indy shop near you to install it. I just had the same happen to me 2 weeks ago so I feel your pain. Good luck with the car
__________________
Current Car: 2015 Tanzanite F80 M3 w/ Cohiba Brown Interior
Past Cars: Le Mans Blue 2010 e92 335i M-Sport 6MT // Cobb // BMW Performance Exhaust // AFE DCI Stage 2 // ER CP // Gloss Black BMW Performance Spoiler Rep // BMW Performance Black Grills // 19" Black Avant Garde m359s // TGS HPB LED Interior Kit Last edited by seepete753; 04-18-2017 at 11:01 PM.. Reason: Didn't see the year of OP's car and asked... |
Appreciate
0
|
Bookmarks |
|
|