I have a 85mm maf part# 25168491 for my ls swap into my 69 camaro. Trying to tune the car with my hptuners and i'm getting funky readings on the MAF. I purchased the LS1 PSI harness with the 5 pin update for the 5 pin MAF. Does anyone know the connector sequence on the 25168491 MAF? I saw conflicting threads showing what A thru E was on the MAF? Then again hopefully the harness is wired back to the ecm correct??

 

Does this help? http://www.justanswer.com/chevy/4h39...ailblazer.html
According to Phillip at Bluecat tuning all of the 5 wire MAF use the same circuit numbers and pin to the PCM the same. I was just dealing with a MAF issue.

 

Thanks oldgoat69...it is one of the diagrams i have seen. psi wants me to rewire the connector as follows: A to maf output , B to ground, C to maf power, D to IAT reference and E to IAT output? Maybe thats the way they wired the harness??

 

Why run the maf at all? You have hp tuners, run sd.

 

You could run just speed density, but MAF is preferred my most of the tuners I know. Maybe check out the HPtuners forums to get a consensus before deleting the MAF.
I dug a bit more and found this, I have my MAF pinned the same as this example. http://www.thirdgen.org/techboard/di...n-421-cid.html