[REAPER_04]

just got my 04 cobra 2 wks ago with 28,000 mi on it, blk/blk convert.
very clean, runs great sometimes

anyone have a problem when pushing boost, my car bucks one night and the next it runs smooth as hell.

figured it needed tune so i did it and it still does this, tried traction control as well, still does it.

any help would be awesome.

figure maybe fuel injectors or somthing like that

[hotshot]

sounds like you are having some tune issues....

[REAPER_04]

i was wondering that 2
but than i figured it would do it all the time if that were the case right?

maybe boost leak? seems to over boost when it does this, boost gauge shoots all the way to max, passed 10

forgot to add that its bone stock.

[jrowledge]

Help me a little, does this feel like a single cylinder or are all cylinders at fault? If I could look at this I would check for codes(since you don't mention the check engine light being on I assume no codes are stored) and then look at the mode 6 information. Mode 6 is the raw test results the computer generates when it runs it's monitors. I have found that the computer will record missfires on a cylinder but not reach the threshold for setting the code. If it is one or two cylinders you may have a coil or two or a coil to plug boot or possibly an injector. You may be best off finding someone good to look at this for you. If you can talk to the tech and you don't get a deer in the headlight look when you ask about mode 6 you have probably found your guy.

[REAPER_04]

Thanks for replying jim, no check engine light, why would it do this one night and the next keep up with a 430whp evolution, its very strange and im not great at explaining things

there seems to be alot of noise at one of the fuel injectors, but i dont know a ton about this stuff, which is why i cant figure it out myself hehe

its completely stock

[REAPER_04]

Got it fixed guys! it was 1 of the coils, now it runs smooth as new.
thanks for trying to help me out guys