Relays on firewall
 

I'm having a maf problem. Low voltage code comes up constantly. Have replaced ecm and maf (microtech, big power gain). I found one relay with a loose terminal (F) after checking entire wiring harness. It is the 3rd one from the fender What relay is this for? Two of these relays look identical, can I interchange? Will an 86vette relay work on my 86 iroc?

That one should be for the fuel pump relay. The other two are for the MAF power relay and the MAF burn-off relay.

burn off relay
 

Thanks Trickster. New question. Since my new maf has no wire, only a circuit board, will the burn off process damage the new maf?

No it won't, I also have one of the Microtech MAF sensors in my 89 Iroc and have had no problems with it.:D