So I got the 1989 Iroc running, it has the 305 TPI engine in it. I unplugged the TPS, and it fired right up. I went to the junkyard and could only find a TPS from a 2.8L multi port v6. I put it on my car, and it seems like it might be HELPING. Is this doable? are TPS units interchangeable like this? ALSO the only way it runs right is if I unplug the Mass Airflow Sensor. once i plug it back in it chokes out anytime I hit the gas. Now that I have that unplugged, I can drive it but anytime the RPM's are under 1800, it chokes and bogs out until I can get the RPM's back up. Once it's above this threshold, i can floor it and it runs fine. What's going on? I replaced the fuel pump, relay and filter already if that's anyhow related (In the case that they were clogged or something). NEED HELP ASAP!! Thanks!

 

Bump....any help out there?

 

Replace the power and burn off relays for the maf sensor, sounds like one or both may be acting up.
They're the two oval shaped ones on the firewall near the brake booster.