P1689 still running though but rough

[Tuck]

So I have read everything there is about this code and parts and followed a lot of steps of troubleshooting! But my question is has anyone done the re-sauter of the transistor inside the vp44 and did it work? 

I know it’s either my vp and or the ecm. Just still trying to get a good idea on which one to drop the cash on. 

 

So so after new fuel pump(17 psi now ??), filter,apps, and a lot of ground wire chasing the truck starts fine but low idle around 6-700 rpm then if you hit the throttle no matter very lightly or peg it to the floor it jumps to 1400 and stays. 

[Mopar1973Man]

2 hours ago, Tuck said:

But my question is has anyone done the re-sauter of the transistor inside the vp44 and did it work?

 

No, not that I know of. The other problem is the calibration will be all out of wack most likely. This is why the Bosch 815 test stand is to run the pump for 3 hours and flash the PSG with calibration. Modifying the PSG or repairing with another transistor you are taking a risk. 

 

2 hours ago, Tuck said:

So so after new fuel pump(17 psi now ??), filter,apps, and a lot of ground wire chasing the truck starts fine but low idle around 6-700 rpm then if you hit the throttle no matter very lightly or peg it to the floor it jumps to 1400 and stays.

 

That is called a "Limited Pedal" typically that is an ECM problem caused by a bad alternator. Need to test the alternator for excessive AC noise. Then replace it if failing. Then you want to do both the W-T ground wire mods and my PCM protection mod. As for the ECM you want to contact @Auto Computer Specialist and have them test the ECM for you.

 

[Dieselfuture]

I was going to do the transistor deal at one time, but after taking care of all the electrical Gremlins problem went away. 

[Tuck]

Ok thanks I appreciate it guys. I’ll check into those things aswell!