Strange missfire.. Need help :(

[ESchwanz]

unplug the battery and hook it back up. the misfire and check engine light will both hp away and once the light comes back so will the studder. do you have a black top cam angle sensor? if not get one and it will make the light stay off for longer. you can get an eprom and a burnt chip ($300 or so) and that will get rid of your problem for the cheapest and you can get dsmlink down the road.


Yeah mine had the same problem... seemed to happen less during the winter for me .. but since getting the ECM/DSM_LINK I've had no more problems! :)

Q6nhaT-wRxw

[Mike Neal!]

^^^^ yeah thats the same thing..
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Talon-
I am pretty sure it was my MAF being dirty..(K&N near open hole in fenderwell with no inner fenderwell cover its exposed to weather like rain and dirt) not a boost leak.. as it doesnt need to be under boost to happen. It had a boost leak before that I could feel coming out of the pipe.. it didnt cause a miss.. it blew off a couple times and then I fixed it so it wouldnt come off and had held boost just fine.

[ESchwanz]

^^^^ yeah thats the same thing..
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Talon-
I am pretty sure it was my MAF being dirty..(K&N near open hole in fenderwell with no inner fenderwell cover its exposed to weather like rain and dirt) not a boost leak.. as it doesnt need to be under boost to happen. It had a boost leak before that I could feel coming out of the pipe.. it didnt cause a miss.. it blew off a couple times and then I fixed it so it wouldnt come off and had held boost just fine.

I really don't think it was the MAF being dirty, so until you get DSM link it will continue to happen on and off... Its a problem with the ECU & CAS reading a misfire & the only way to clear the code is to disconnect the battery for 30 sec or more to reset the ecu. Drove me nuts... once the DSM link was put in I've had 0 problems..

It's a 6 bolt swap correct? If so then it's what I said....

[asshanson]

^ :score010:
My 6 bolt misfire problem went away with dsmlink. Didn't happen once before the 6 bolt swap, or once after dsmlink ignored that code.

[LaunchHard]

I am having this probem right now, but i have a 1g with a 6 bolt and an eprom. Its pretty much the same as the description and the video. Im suppose to hit the dyno tomorrow at 2, so i need to scramble and get it fixed ASAP. Any suggestions? Im going to give the main sensor harnesses a good look through in the morning and tighten all IC piping.

It feels very similar to an IC pipe blowing off when it happens or a good boost leak, but the fact that it happens randomly leads me to believe its a sensor. Also, i have NOT had any check engine lights, so...

[blackrosenova400]

Almost sounds like an injector going bad, coil inside is opening causing the injector not to fire.

Ive had this happen to me before, the injector would get warm and the injector coil would open, and the injector would no longer fire, causing sputtering. Maybe something to check if you have any suspicion of them, maybe your using older injectors.

It would definitely feel random. Ever get it to do it at idle?

[LaunchHard]

Almost sounds like an injector going bad, coil inside is opening causing the injector not to fire.

Ive had this happen to me before, the injector would get warm and the injector coil would open, and the injector would no longer fire, causing sputtering. Maybe something to check if you have any suspicion of them, maybe your using older injectors.

It would definitely feel random. Ever get it to do it at idle?


My injectors are about two years old, there 1000cc Precisions, and they cant have more than 3k on them. I dont think ive ever felt it at idle. Any way to test for this??

[blackrosenova400]

It happened to me with stock 450cc injectors. Finally got it hot enough it was still dong it at idle. I knew I had spark, tested for power at the injectors, found good power. Then I pulled each injector clip while it was running to pinpoint the culprit. It probably isnt your case though, but you never know.

[LaunchHard]

Could this random sputter be caused by the 2g mas going out?