Help! Fixed CEL code items, now stalls out!
Thread Starter
Staging Lane
Joined: Oct 2007
Posts: 76
Likes: 0
Help! Fixed CEL code items, now stalls out! I had two codes and the car wouldn't start. P0140 and 1416. I took out the AIR CHECK VALVES, put in new ones. Replaced the 2ndary O2 sensor. Now the car starts, runs 5 seconds and stalls out. I'm %99 sure I got the O2 sensor plugged in, but it was a pita. The car won't run long enough to pull new codes. I'm thinking 2 things, could the seized check valves have messed up the air pump? Could a cat be plugged? I'd like to get a pressure gauge to check fuel, but it starts ok. How do I diagnose from here?
1998 trans am, auto
1998 trans am, auto
Those 2 codes should not cause engine shut down..
Check the fuel psi...Sounds as tho the pump prime is working, but pump does not continue to run, once key is back in the run position.
Check the fuel psi...Sounds as tho the pump prime is working, but pump does not continue to run, once key is back in the run position.
Thread Starter
Staging Lane
Joined: Oct 2007
Posts: 76
Likes: 0
It does run for 8-10 seconds after releasing the key. Are those two separate pumps? or just 2 functions of the same pump?
1 pump.. Turning the key to start will spin the engine over, creating a tach signal. That will then restart the pump.
If you are starting the engine, and then it dies, it could be the run side power is missing.
Thread Starter
Staging Lane
Joined: Oct 2007
Posts: 76
Likes: 0
I measured the pressure at the rail and it's only 15ish and drops off. I have a 1998 and read the cut hole location for the tank is different. I searched with no luck on A how to for fuel pump replacement?
