No start.

[jarek m]

So the truck lasted problem free about two years after big rebuild, good run for a 200k truck with $2k refresh.

Air ride compressor is out again after 50k miles or so.


But the big problem is new no start and dead OBD2.


The truck just died on the go and wouldn't crank after. It has all the symptoms of a dead battery but its not it, I also bench tested the starter... Ok.
Recently I started getting low engine power and it would clear by turning the ignition off.
All fuses ok, starter relay tested ok.

[HUMTECH]

Do you have a remote starter that is tapped into your data line right behing the data link connector? If so remove the splice and try that.

[jarek m]

Not anymore, that's the first thing I took out, reconnected al the splices

[jarek m]

Also today I astablished that starter cranks the engine when jumped, no start. Ignition relay clicks but starter relay don't, even when swapped.

[HUMTECH]

Try using a jumper wire across pins 87 and 30 of the starter relay and see if starter cranks

[HUMTECH]

[jarek m]

Originally Posted by HUMTECH

Try using a jumper wire across pins 87 and 30 of the starter relay and see if starter cranks

The truck started crankin but no start.

[jarek m]

All grounds tested ok and 2 pink tested 12v on the ECM plugs.



ECM looked ok in every way

[jarek m]

New ECM in route...

[jarek m]

New ECM still no start :/

[HUMTECH]

Did the dealer program it for you

[jarek m]

No, eBay seller, "ECM programers" had a feedback of 100% couple thousand sales.

[HUMTECH]

so did they preprogram it for you with your vin#? If not you need it programmed. If they did you still need to do a theft learn follow this procedure.

1. Turn ON the ignition, with the engine OFF.
2. Attempt to start the engine, then release the key to ON, vehicle will not start.
3. Observe the SECURITY telltale, after approximately 10 minutes the telltale will turn OFF.
4. Turn OFF the ignition, and wait 5 seconds.
5. Repeat steps 1 through 4 two more times for a total of 3 cycles/30 minutes, the vehicle is now ready to relearn the Passlock? Sensor Data Code and/or passwords on the next ignition switch transition from OFF to CRANK.
Important: The vehicle learns the Passlock? Sensor Data Code and/or password on the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.
6. Start the engine. The vehicle has now learned the Passlock? Sensor Data Code and/or password.
7. With a scan tool, clear any DTCs if needed. History DTCs will self clear after 100 ignition cycles.

[jarek m]

Tried this procedure two times, no change.

[jarek m]

Ok an update, I decided to start over and found PCMB fuse is blown now. Replaced it and the truck cranks now, but no start. OBD2 communicates, no codes. PCM1 fuse gets 0v in all key positions, there is no fuel pressure and fuel gauge is not working...

[jarek m]

I'll try the passlock procedure again. Fingers crossed!!!

[jarek m]

Well passlock procedure didn't work. But i got it running.. Kind off.
I jumped PCM1 fuse to the battery and it started! And stayed running till i puled the jump.