Timbo89GTA

1991 Camaro 305 TPI. After 10 min of running rpms jump to 2000 in park runs rough when step on gas put in gear car dies then wont start only when putting pedal to floor starts up and dies. car sits for a while the start back up and same thing. the only code it gives is 15 faulty coolant sensor or wiring with sensor which to me should not cause this problem. any help would be great thanks

MMroc86

Sounds like it could be a problem with your mass air flow sensor, unplug it & see if it runs better.

My 87 T.A was doing that, but when I unplugged the MAF it would stay on & was driveable. Not sure if the 91 cars still have an MAF tho....

Timbo89GTA

Hi thanks for the reply no it doesn't have one

MMroc86

Gonna take some serious troubleshooting to find/fix this. Start with the basics.

Check your fuel pressure, I believe you should be at around 37-43
Change the fuel filter.
Check fuses, sometimes you get lucky.
Check all major grounds, do a search for the location, I'm not sure where they are all at.
Make sure all connectors are plugged in correctly.

Your car must be speed density/map. If it does the samething as the maf, then it might be causing your problem.

Search speed density or map problems & see if you find ppl with similar issues related to that sensor.

Timbo89GTA

K thanks ill look at those. first thing I did was fuel filter.

Timbo89GTA

So just an update for those who looked. It ended up just being the temp sensor in front of the intake. Replaced it and car ran and started fine. did not think it would of caused that problem. Cheers