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Discussion Starter #1
I know this is like beating a dead horse I have come to this site and have tried everything possible to fix this issue.

Done brake calipers and rotors on the front thursday evening drove it home and it done fine however Friday morning I go to start the truck it spins over but will not start. I have replaced the following

Ipdm Relay
Ipdm Module
Fuel Pump
Crank Sensor

Anti Theft light flashes like normal
Installed the fuel pump connected the battery then plugged it up just to make sure it run. It came on so we installed the pump in the tank and went to start the truck and now the pump will not run. I have done the test for the IPDM and everything checks out normal horn,lights,wipers, fan etc. All fuses and relays are good checked every one of them, The fuse links on the positive cable are good as well? Any thing I could be over looking?

No codes Nothing with the scanner.

Spray it with starting fluid it will fire right up

ECM Fried?

Any suggestions will help
 

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If the fuel pump won't come on, it's either a bad pump or a bad connection. No fuel, no start, as you've discovered. You have a pump which is now dead, or you have a short in the wiring. Do you have voltage (correct voltage) at the plug when tested by a multimeter? And are you keeping the wiring in as close to stock position as possible when you test it? Electrical shorts are a pain in the neck to diagnose sometimes. Sneaky little devils...
 

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Discussion Starter #3
If the fuel pump won't come on, it's either a bad pump or a bad connection. No fuel, no start, as you've discovered. You have a pump which is now dead, or you have a short in the wiring. Do you have voltage (correct voltage) at the plug when tested by a multimeter? And are you keeping the wiring in as close to stock position as possible when you test it? Electrical shorts are a pain in the neck to diagnose sometimes. Sneaky little devils...



Thank you for the response. It will come on and purge the 2 seconds like normal each time you you unplug and plug it back in. However once it does that it will no longer run. Its like it builds pressure then shuts itself down. The wiring is in the stock location. I despise wiring :serious:
 

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A multimeter and following the troubleshooting in the service manual would eliminate about 80-90% of the guesswork that created your list of parts purchased. There are other things besides electronics that can cause a no fire condition. Fuel filter plugged, loose wire, dry running a pump can sometimes burn it out, mass air flow sensor fail, fuel tank pressure sensor fail, and on and on.......

I know your frustration is real, but basically codes via OBDII are only to indicate a condition that is responsible for you polluting.
 

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Discussion Starter #5
Update!! The truck will fire then die off however it did Throw these codes. P0123,P0223 P1121 Thank you for the reply!
 
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