I was datalogging my friends formula tpi (32B) and was following the gm/sec. At idle(.65v), it was reading 12-15, light throttle(.88) it went up to 35- held for 5 seconds, dropped to 20, popped back up to 35, then fell back down to 20. It has been quite random, most noticeable on light take-offs.

 

Light throttle is when the EGR is trying to work, that is if the car still has a working EGR. The EGR feeds the engine unmetered air at intervals during light throttle.

 

Ok, but why would I get a reading on the maf? Essentially the maf is reading more air and leans out. It drops in the reading, car runs fine. I'll post a screen shot tomorrow.

 

What makes you say it leans out? The MAF output determines how the ECM calculates injector pulse-width. A higher MAF output would result in more fuel delivered.

 

That would make sense, so wouldn't the mv go up? take a gander at the pic attached. I was holding the throttle steady in park, light throttle.

 

So with a steady throttle your engine RPM is jumping up about 400 RPM intermittently?

I would try disabling (blocking) the CCP, EGR, and AIR functions and do the test again, - at least for a first try at troubleshooting.

 

tried another maf and running better, slightly rich