Recently had the ottp stage 2 kit on... 2.8 pulley, 60's and every once in a while when I got wot i get a studder around 4-4500rpm. Its a quick studder but it can be felt. Im on a canned tune from ottp with a zzp dual pass, header, gutted dp, 2.5 borla exhaust. also my plugs are gapped at .032

 

Lets take a log when you get a chance and we can take a peak whats going on. I can post the log once we get together again so more experienced tuners can take a look. The tune on this car is directly from OTTP and was just uploaded to his ecu. Nothing else was changed on this tune.

 

thanks Lars yeah lets do that i'll drive out to you whenever your free

 

i have a random studder at wot. it has something to do with the cam position sensor

 

Most LSJ's have a dead spot in the upper rpm range that basically presents as a misfire. It tends to show up as you mod more heavily. Mine used to do it between 5000-5700rpms usually, only one time, felt like it hit a rev limit but then it kept going just fine. Usually showed up in 2nd gear, sometimes in 3rd. Nothing to do about it.

 

Yeah i remember mine doing it a few times but this was when i was untuned still.

I will post the logs up so people can take a look.

 

I have had this happen a few times as well on every setup I have ran. Just feels like a quick single violent misfire.

 

Exactly

 

I experienced a similar issue (same rpm & gear). Found out it was spark blowout due to flowing more air. I regapped my plugs from 0.035"-0.032" and never had the issue again. Not saying it was the same issue as yours, but it sounded familiar.

 

Gapping lower helped my car, but I still get it every once in a long while

 

Bllow bloooooooow bye do what staged said. I gappee mine to. 030 and bam no problems.