Took the car out tonight and everything seemed fine. Until it started cutting out under acceleration, like the spark plugs were bad. Which were changed about 4 weeks ago. This is happening in every gear around 4500-5000rpm's. Any insights or things to have checked would be appreciated. The performance shops around here are sketchy.

 

check your gap...and what type of plugs are you running?

 

NGK BP7ES gapped to .24 I believe. Never thought about that. Does that souind right? Thanks Turbo.

 

My car would do that when It hit fuel cut, make sure your not overboosting.

Also if you have a MBC turn it down just a little and see if the car continues to stumble like that

 

Yeah its like that, and I did turn the ebc down and it still happened.

 

I would email dynoflash...but it seems odd that you have this problem all of a sudden. If you haven't had a spark plug failure or your gap was incorrect or a coilpack is going out(never heard of it happening like this). Possibly a bad tank of gas too...so hard to determine over the web

again, log and check with dynoflash rather than internet keyboard warriors

did you try resetting your ecu?

 

was having same problem.. dropped the gap down to .17 and cleared it up

 

Not entirley sure on it because Im still in Ghan land and hadnt been able to test it out yet, but Im having the same similar issues with mine and other than the spark plugs I was informed to check for boost leaks.

 

look close at the plug wires and plugs. I had a crack in the porcelain and it did this.

 

Thanks a million guys. Will check plugs/gap wires etc, after work and report back.

 

Everyone was right, it was the spark plugs. I don't know how they could be fouled this bad, the tips were orange. Changed them and it pulls fine now. I'm wondeing if running to much boost could cause that?

 

Just to update, in case anyone has similar issues. New plugs helped, but it started miss- firing again. Closed the spark plug gap and then got the PO300 CEL. Then Sunday at an Auto-x, all hell broke loose. Thought the engine was damaged and limped home. Got into shop, and it turns out the ignition coils were bad. Getting them replaced and hoping this finally resolves the problem.

 

keep us updated, Im having this problem too since I bought the car, I ordered new spark plugs and am about to change the garbage HKS ssqv for the OEM one (ordered yesterday)

 

Will do Karass! Hope you get to the bottom of it too, GL!

 

Update: The shop replaced the coil-packs, and I'm still not getting getting voltage to cylinder 1They did a compressiion test and it came out fine. So they have to have another shop more versed on electrical/computer issues trying to diagnose whats going on. If anyone of you have any ideas I'd be glad to hear it and will pass it along. Also, when this is all untangled, I hope to be getting it re-tuned.