uzeial

Well, the folks over in PCM/Diagnostics didn't chime in, but maybe my fellow LT1s will...

I have 94 trans am with no mods.

So, when I bought my car, the air pump had already been removed, but the fuse in the fusebox and the relay in the box in the engine bay were left in place to keep the PCM happy. However, the fans don't come on at the correct temp when the relay is in. The car will heat to the 3/4 mark on the temp gauge. So I removed the air pump relay and the SES light comes on shortly after the car comes up to temp, the fans come on and stay on until the car has been stopped for a few seconds. I can't extract a code from it when I try to scan the PCM. Seems like it's in limp mode when the light is on, the car feels like it has less *** than it did with the relay in.

Should I get a tune to remove the air pump codes fromthe PCM or do you think my problem is deeper than that?

Thanks y'all!

shbox

Sounds normal. Put the fuse and relay back in. There is no need for the fans to run all the time. You don't have a problem. A SES from the AIR pump is not going to affect performance. You may be feeling something that is not there.

uzeial

Thanks!

uzeial

The only other thing is that with the relays in, the fans won't come on at all.

shbox

Are you sure about that? You need to monitor the fan status and engine temp with a scanner. Fans don't come on until 226 degrees. Based on your previous info, we know your fans work.

uzeial

Can you recommend a good way of monitoring?

Thanks a lot for your help!

shbox

Any scan tool that can do live data.

uzeial

Excellent. Thank you again.