NastyL98_T/A

Ok, time to chase down a 34 again. My plan is to check the connections at the MAF and all relays on the firewall. Qustion is which relay is maf power? Mine aren't in the stock locations since I did the motor swap. I need to use wire colors to I.D. the relays. I have the fuel pump identified, but I think I may have the burnoff and maf power switched. Are all the relays supposed to be the same? One of the relays has a different part number, so that could also be my problem. Im just hoping it's not the maf itself.

Also, how would an exhaust or vacuum leak figure into this equation?

Vader

A vacuum leak will significantly affect the MAF signal to the ECM.



Check the MAF output voltage at idle. You should be getting about 0.75VDC at a minimum on your L98.

Trickster

If his car is a 1990, wouldn't it be MAP instead of MAF? Code 34 for it would be SIGNAL VOLTAGE LOW - HIGH VACUUM.

NastyL98_T/A

Motor swap. It's an '86 maf harness in a '90 body.

Thanks for the info. I'll be checking voltage outputs tomorrow, and also making sure that all the grounds are good.