spark issue?

DCsleeper · Feb 25, 2007, 07:25 PM

See attached log...is this the spark being blown out? Time for an ignition upgrade? Recommendations? I have allready tried new spark plugs NGK copper 7s gapped to .026...

MalibuJack · Feb 25, 2007, 07:49 PM

Its possible, but if your using Open Loop Fueling, since you have the MAP sensor hooked up, check the boost cut value, default it was set for 22/23psi and I would get what felt like fuel cut whenever it would hit that...

If your still feeling "weirdness", try a tighter gap on your plugs, if that helps then its definitely misfire, at 23psi of boost the spark can get blown out very easily with the stock ignition.

DCsleeper · Feb 25, 2007, 08:05 PM

good points jack...

I am using open loop fueling, and maf readings to determine load. The max psi is set for 25psi and the max maf value is set to 1800.

It is not very noticable when driving only appears in the logs and shows a dip in torque on dataloglab. At first I thought that I was just running rich in those cells but after closer look that definetly isn't it.

Guess I will regap the plugs closer and take her out for another spin when the weather gets nicer...snow and ice makes it really dangerous to tune