The vehicle is a 1991 Z28 w TPI 5.7

Here is kind of a "log" of what went on yesterday:

- 11:30am
Started Camaro. I usually wait a minute or so to warm up (get situated). It idled at 1000rpm for 30 seconds. Suddenly the check engine light comes on and RPMS took a nose dive to 200rpm but to quickly move to 500rpm. Check engine light stays on for 10 seconds with the motor surging between 500-600rpm. So I turned the car off and my drove truck to work.

(BTW I didnt put it in gear when all this happened).

- 12:30pm
Left work early to work on Camaro.
Got home, started vehicle, idle at 1000rpm for 20 seconds (normal), then a sudden surge to constant 500rpm with check engine light for 10 seconds,
then back to normal. Turned off vehicle. Checked for stored codes, none found. (??)

- 1:00pm
Started car. Ran for 3 minutes and never saw a problem.


- 1:30pm
Started car, immediately displays SES light and surges from 500-600rpm. Problem does not go away (I let it run for a minute or so as well as just "drive" around the parking lot).

I checked for codes (paperclip trick). Engine light just stays on. After a minute, I hear a click under the hood, fans come on, and it displays code 12 over and over. After it displaying code 12 about 5 or 6 times, the engine light comes on randomly and I hear that click under the hood again.

I probably COULD drive the car down the road to an Oreillys and have them do a code check but Im worried with the motor running this way.

 

might as well just delete this post

 

Don't delete it Just repost on the TPI Board.

Since no codes are set, your best bet would be to have a scantool plugged in and monitor to see what's going on.