I have an 85 iroc that had a 5.0 tpi, i just put the tpi setup on a 5.7 once i got it all set and running it threw a code 33, so i bought a remaned MAF and put it on and ran like a charm for about 30 miles, then started running like death again and CEL turned on and ofcourse it was code 33 again. So now instead of throwing another MAF at it i want to diagnose it properly. I found this link on how to do that http://www.chevythunder.com/maf_code_33.htm

my question is if I am doing the flow chart correctly? It says supply 12 volts to the "g" terminal of the aldl connector? Isnt that a fuel pump turn on circut??