I have a 1986 IROC-Z Z28 305, automatic Camaro I picked up a 1988 PROM I made sure it was for the right transmission and engine, but when I popped it in the car turns over but wont get started. Is there something else I need to do to get it to run?

 

This is the one i picked up.

 

I did have the computer replaced, it is a remanufactured one from carquest. I don't know if that is the issue.

 

What is the 3 or 4 LETTER code on top of the PROM?

Moving to DFI & ECM.

RBob.

 

AKFS

 

That PROM has VATs enabled, injectors won't fire. If you want can get a VATs eliminator box to send that signal to the ECM.

RBob.

 

I thought this one didn't have vats... What are the versions I can use and which one is the best?

 

I have a 1988 Chevrolet Camaro IROCZ with 5.0 305 RPO LB9 TPI engine. I bought a Hypertech ThermoMaster performance PROM computer chip, A Hypertech 160 degree cool fan switch & an SLP 160 degree cooling thermostat. I ordered all of this from Summit Racing Equipment back in late 1989. My Camaro kept getting very hot and overheating so I called the tech guy at Summit and he suggested that I purchase these parts to correct the issue and I have not had a problem since I installed these parts. These modifications made my Camaro a completely different & much improved car!!!!!!! It doesn’t overheat any more and the improved performance & throttle response is TOTALLY AMAZING!!!!!!!! My gas mileage is even better.But Hypertech recommends only using 91 or higher gasoline octane because of the changes from mods but the gas mileage is much better than the stock setup. Since the automatic transmission is ECM & PROM chip controlled this shift points are more firm and smoother than with the stock setup. I would highly recommend & suggest this performance & mileage modification to anyone for their 3rd gen Camaro or Firebird. This was money well spent and worth every penny!!!!!!!!

 

HyperTech chips SUCK, 160 degree thermostats SUCK, and 160 degree fan switches SUCK!!!

Your car's 100% bone stock cooling system will cool your car just fine.

Did you live in Death Valley back in 1989?

When you say your IROC-Z was getting very hot and overheating do you mean the needle on the gauge was pointing at a number that scared me or that coolant was violently exploding all over the place under the hood?