I have three relays on the firewall, it's an 86 IROC, TPI, I think in order from left to right looking from the front of the car is MAF burn off, fuel pump, and the other MAF relay (I can't remember what it's called). All of the relays have the same part number on the top. Should I assume they all use the same relay? I have two relays from AutoZone and they were both listed for the burn off relay, but the part numbers are different. Has any one ever changed one, and if so could I have the part numbers to get the right ones for all three if possible? AutoZone and the dealer all told me they have to compare it to the original one.