I had some electrical issues on my 86 auto V6 car. It would run at 800 rpm for 2 seconds. Then it jumped to 2000 rpm, CEL, and die. It threw code 12 22 33 45? Basically TPS, MAP, and Rich running. I spoke to previous owner (a flipper who didn't have the car long.) Said he replaced new TPS and good MAP and ECU. I replaced the O2 as the old one broke off. He said the same thing happened so he took the ECU back and got new one warranty. I got the new reman ecu. Now the car will not run. I did disconnect battery before I replaced new ecu. It has spark. I can hear fuel pump. It will run for 1 sec then die. No codes. Not even 12. Any thoughts?

Is the check engine light on when you turn the key? You should be able to see code 12 if the ECM is working, so it is not working.

Check ECM fuse in fuse box.

quote Originally posted by olejoedad: Check ECM fuse in fuse box.

The fuses under the dash are all good.

I would suggest checking the engine grounds. The sensors ground to the engine block, by the bellhousing (firewall side). Look for broken wires, or eyelets hanging loose. Also check the ground strap. It attaches to the firewall side cylinder head (near the battery), and goes to the chassis.

Is the Connector tight?

quote Originally posted by SecretMoparGuy: Yeah no CEL at all. I am getting a used but supposedly good ECU off a guy I bought some other parts from today. I'll let you know how that goes.

Used ECU has CEL and starts car. So new reman ecu was not working. Still has the problems but throw only code 33.

There are two broken ground wires I think I will upload pictures.

The ground wire by the battery provides grounding from the terminal to the space frame.
The ground wire by the transmission connects to the drivetrain and the lower frame rail on the driver side of the car.
Both are crucial to proper operation.
Repair them.
While you are at it, there.is a ground strap from the front head to the passenger side hingebox stud.
Clean both attachment points.
Clean the ground wires from the engine harness to the transmission to engine bolts, and also the ground wire from the harness to the driver side hinge box.

You car will like you for the effort.

quote Originally posted by olejoedad: The ground wire by the battery provides grounding from the terminal to the space frame. The ground wire by the transmission connects to the drivetrain and the lower frame rail on the driver side of the car. Both are crucial to proper operation. Repair them. While you are at it, there.is a ground strap from the front head to the passenger side hingebox stud. Clean both attachment points. Clean the ground wires from the engine harness to the transmission to engine bolts, and also the ground wire from the harness to the driver side hinge box. You car will like you for the effort.

I will repair these. I have solved the problem. The tube just before the MAP sensor had a crack and caused a vacuum leak.

quote Originally posted by SecretMoparGuy: I will repair these. I have solved the problem. The tube just before the MAP sensor had a crack and caused a vacuum leak.

vacuum leaks don't cause CEL lights to not work. Something else is loose.

quote Originally posted by Gall757: vacuum leaks don't cause CEL lights to not work. Something else is loose.

The new/used ECU works with CEL.

Just curious, when you installed the remanufactured ECM, did you remove the PROM chip from your original ECM and put it in the remanufactured one?? Most reman ECMs do not come with the PROM, it must be swapped over....

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Rod Schneider, Ball Ground, Ga.
"You can't have too many toys!"
1988 Fiero GT
1988 Porsche 928S4
1987 Corvette
2016 Mustang EcoBoost
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[This message has been edited by Rodrv6 (edited 10-15-2019).]

quote Originally posted by Rodrv6: Just curious, when you installed the remanufactured ECM, did you remove the PROM chip from your original ECM and put it in the remanufactured one?? Most reman ECMs do not come with the PROM, it must be swapped over....

My first thought as well.

Is the vehicle running fine now?

quote Originally posted by Camel: My first thought as well. Is the vehicle running fine now?

Yup runs like a top.