[dana44]

You have made your own logic, and when you replace it, disconnect the battery for 30 minutes to allow the computer to start back on the base computer settings so it doesn't have to work overtime to correct itself trying to overcome the bad TPS to begin with.

 

[Bob Lincoln]

Code 51 is O2 sensor, which is not triggered by a bad TPS. And usually a bad TPS allows it to start and stall, start and stall, with a low idle if it runs. I'd look more for a bad ground, since I believe they use the same ground connection.

 

[93dak]

Code 51 is O2 sensor, which is not triggered by a bad TPS. And usually a bad TPS allows it to start and stall, start and stall, with a low idle if it runs. I'd look more for a bad ground, since I believe they use the same ground connection.

Alright I will look for a bad ground, I have replaced the 02 sensor about a month ago.

My truck has never stalled on me while driving. Has just never cranked on the first turn of the key, Most of the time it would start like a champ on the second or third but sometimes it takes 20-30 mins trying (has been getting worse latley). I figured bad fuel pressure in the rail so i replaced the pressure regulator since i do hear the pump kick on.

This didn't seem to help at all so i ran the codes last night.

Any idea of where this particular ground would be?

 

[Bob Lincoln]

I can check the manual for my truck.

You may have a failing fuel pump. With the engine cold, turn the key to ON, not START, then shut it off and unscrew the cap on the fuel injector rail and press the pin in (watch your eyes, wear goggles). It should squirt.