[elig0nzal3z]

last night when i was coming home and got on the ramp to 275 i figured id floor it a little to get in front of another car suddenly my ses light started flashing and noticed the car began to kind of vibrate if i gave it just a little bit of gas so i tried to keep it cruising steady at 60 and after about a mile the ses light went away and he car felt normal again. once i got home i used my jb4 to read me the codes and i got this

29cd misfire cylinder 1
29cf misfire cylinder 3
29d2 misfire cylinder 6
29ce misfire cylinder 2
29cc misfire in multiple cylinders

my car is stock besides jb4 and dci.
any input would be great i'm thinking the first thing i'm going to do is change all 6 spark plugs and see if that helps in anyway.

sucks being out of warranty this car has given me an issue just about every month sense i brought it first the water pump then the head valve seal and oil filter housing seal now this. i've only had the car for about 4 months and it has 100,000 miles.

[PHR]

High Pressure Fuel Pump

[dAng! E90]

Spark Plugs first. Then do down the line from there, coil pack, injector, HPFP, LPFP.

[Crewchief05]

if it is the HPFP you are lucky since you are out of warranty. These should still be covered.

[JStang]

If you haven't replaced plugs in a while, that's where I'm placing my bet.

[dlbrooks18]

Check coil packs and then plugs if probs persist..

[elig0nzal3z]

yea i'm going to change all six spark plugs first and then see from there hopefully its just that.

[themyst]

http://www.e90post.com/forums/showthread.php?t=631829

read sticky

/thread

[elig0nzal3z]

so updates i changed spark plugs today they looked pretty bad and i hadn't changed then since my head gasket seal was replaced, seemed like cylinder 2 and 4 were pretty soaked in oil.
drove the car a few mins ago and she pulls so much better now and no more back fire s far.
i tried cleaning the intake valve followed the DIY but just couldn't do it i think I'm going to wait and find someone to give me a deal on walnut blasting to see if i can that done instead of trying to do it with carb cleaner and a gun brush

[Jeff@TopGearSolutions]

Originally Posted by elig0nzal3z

so updates i changed spark plugs today they looked pretty bad and i hadn't changed then since my head gasket seal was replaced, seemed like cylinder 2 and 4 were pretty soaked in oil.
drove the car a few mins ago and she pulls so much better now and no more back fire s far.
i tried cleaning the intake valve followed the DIY but just couldn't do it i think I'm going to wait and find someone to give me a deal on walnut blasting to see if i can that done instead of trying to do it with carb cleaner and a gun brush

Are you sure the spark plugs had oil? That may be fuel?

Did you smell them?

If its fuel that usually means your injectors are leaking.

If its oil it may time for a new valve cover gasket.

[MurderedBeemer]

I've had this problem for a couple of months now.. When at WOT is backfires like I have antilag, see light comes up, then leaves after a couple of minutes of cruising. If I get to a light it starts shaking so I shut the off the car and restart and its fine after that.. I'm still under warranty but I should I remove dci and jb4 for a job like this??

[Jeff@TopGearSolutions]

Originally Posted by themyst

http://www.e90post.com/forums/showthread.php?t=631829

read sticky

/thread

Originally Posted by MurderedBeemer

I've had this problem for a couple of months now.. When at WOT is backfires like I have antilag, see light comes up, then leaves after a couple of minutes of cruising. If I get to a light it starts shaking so I shut the off the car and restart and its fine after that.. I'm still under warranty but I should I remove dci and jb4 for a job like this??

See the thread posted above it will answer all your questions to misfiring.

[cn555ic]

Originally Posted by MurderedBeemer

I've had this problem for a couple of months now.. When at WOT is backfires like I have antilag, see light comes up, then leaves after a couple of minutes of cruising. If I get to a light it starts shaking so I shut the off the car and restart and its fine after that.. I'm still under warranty but I should I remove dci and jb4 for a job like this??

Your issue sounds like mine when I had a faulty low pressure fuel sensor. Look up my threads on HPFP. I thought it was this and it turn out to be the sensor

[MurderedBeemer]

Originally Posted by cn555ic

Your issue sounds like mine when I had a faulty low pressure fuel sensor. Look up my threads on HPFP. I thought it was this and it turn out to be the sensor

So if I bring the car to the dealer, do I just tell them to check out and see what there is going on with the car? I know that if jb4 is on map 0 it doesn't misfire. It only does it like you at WOT 4,5oo rpm when jb4 is on. I'm just confused on what I should tell the dealer.. Do I mention any misfire? I need to service it soon too!

[cn555ic]

yeap same symptoms...at 4500 rpms it would backfire and stumble, injectors cutoff and its like running on 3 cylinders...Have someone check your codes for you before you bring it in...You probably wills see 29f3 and 29dc codes if you have my problems with lpf sensor

[psmitty95]

I'm getting cyl 5 misfires too. Just diagnose it by swapping coil packs and move from there until you found the issue. I had cyl 3 misfires over the summer and it was injectors. I'm ruling out spark plugs in my situation since they were replaced 7k miles ago. Here's a really helpful video cobb made:

[elig0nzal3z]

Originally Posted by Jeff@TopGearSolutions

Are you sure the spark plugs had oil? That may be fuel?

Did you smell them?

If its fuel that usually means your injectors are leaking.

If its oil it may time for a new valve cover gasket.

Yea I had my valve seal replaced about a month ago because it was leaking but I never got around to changing the plugs... car feels much better now but still a little slug I feel I need a walnut blasting

[MurderedBeemer]

Originally Posted by cn555ic

yeap same symptoms...at 4500 rpms it would backfire and stumble, injectors cutoff and its like running on 3 cylinders...Have someone check your codes for you before you bring it in...You probably wills see 29f3 and 29dc codes if you have my problems with lpf sensor

I've been wanting to have someone check for codes, I don't have the usb hooked up, is it long to hook up? I have some friends that have it but its hooked up to their car... Any suggestions?

[jetblackcoupe]

i have the procede and the same thing happens to me on map 1 or 2. on map 0, i can go WOT with no sign of a problem. i have tune dci and downpipes... don't wanna start a new thread and don't have USB connected to procede yet. any ideas?

[cstavaru]

If a car has misfires in all cylinders, it's clear that the fault is not from per-cylinder components like spark plugs, injectors or coils. Don't waste your money and keep looking.

[elig0nzal3z]

Originally Posted by cstavaru

If a car has misfires in all cylinders, it's clear that the fault is not from per-cylinder components like spark plugs, injectors or coils. Don't waste your money and keep looking.

what exactly do you mean keep looking?
i replaced all my spark plugs and havent had a misfire ever sence.

[jetblackcoupe]

Originally Posted by jetblackcoupe

i have the procede and the same thing happens to me on map 1 or 2. on map 0, i can go WOT with no sign of a problem. i have tune dci and downpipes... don't wanna start a new thread and don't have USB connected to procede yet. any ideas?

Anyone?