HI folks first off. Ok I have a 1989 Pontiac Lemans 1.6L, 4spd heater and a key car w/ 179K on it.
So here is what I need some help and direction to go with.
Car starts and runs perfect for about 15 minutes, then check engine light comes on. When first starting flashes 1-11 for code 12.
Then after it runs for a bit, worse when outside air temp is high, light comes on and it dies. It will start back up after maybe 4-5 key turns. When it first dies the SES light starts flashing rapily, and will either stop or start again when key is turned. After waiting maybe 10-15 seconds trying to fire it back up, the SES light will flash the code 12, then kinda fire or fires up and runs or runs then dies down.
Some times it will not die even with the light on, other times thus far 2 since this started about 1 month or so ago.
I have a simple Bosch OBD to plug into the ALDL. When it first died and I got it home I plugged it in. It gave me code’s 13 and 22, o2 sensor and throttle position sensor. Now it just stores the typical 02 sensor, 13. I am not sure if it is sensing an overly rich or lean condition. My plugs are white, not the chocolately color. I went ahead and put in a TPS, new Coolant sensor, new coil, new wires and a new fuel relay.
This thing dies like the key is turned off or just runs out of gas. When I first hit the key you can hear the fuel pump pressurize. I have looked at and tugged wires to see if any are cracked or busted, can not find any. Something else that is wierd the gas gauge does not always read right away and sometimes the tach does not move, makes no difference if car dies or not.
I have the factory service manual and so far it has been any help cause either the engine will fire or test light lights and goes to the “yes” box. I saw a flashing SES could mean either the secondary ignition has shorted to ground or ECM has lost ground. At idle it has almost 15 inches of vacum. I have watched the injector and it has a very nice and steady spray pattern. Compression is 136, 133, 134, 135. I have owned and been driving this car since 1-12-07 and it has never once let me down.
I sure hope someone might have some good advice for me. Thank you.