Well that is interesting...thought the first post didn't make apologies.

Will be working the P0101 and P0410...ABS module and still have leak on front diff. Two small ones ...the joys of Blazer ownership...but the ZR2 is running great

 

Under full throttle acceleration, the computer goes to a pre-programmed forced rich mode. Also watching fuel trims while you’re driving around will drive your nuts because the computers skipping around through all the different fuel delivery cell programs. If you watch the O2 sensors under full acceleration, you’ll see them peg Rich until you back off the throttle.

Watching the maf sensor reading at the full throttle one to two gearshift is a valuable piece of information however.

George

 

Hmm I getting ready to leave work so will have a chance to watch and record the MAF as I get on the highway home.

Anything I should be looking for? Hertz, Lbs/min or grams/s?

 

g/s at the moment of full throttle 1-2 shift.

George

 

The MAF went from 5.6 g/s to about 117.9 g/s when floored from a stop till second kicked in also the trans didn't really shift until about 5 thousand

Not sure I had full thottle but 5.7 to 40.6 g/s on another....engine does like 4000.to 5000 with misfires recorded rapidly.but still only 267 on cyl 1 and 58 on cylinder 4

 

Plug your data into here:

https://otctools.com/ve

The idea is that at the 1-2 full throttle shift point your engine is breathing at its maximum air volume. If the maf reading is not as expected then either there is an air flow problem or the maf sensor or related circuitry is bad. Your reading is low. The GM min spec is 130 g/s and we have measured around 160 g/s on our trucks which is within the calulator acceptable range.

George