JBrassfield715
New member
- Joined
- Nov 9, 2011
- Messages
- 266
My buddy has a 6.5 that cuts out at idle, just like a dead miss. The vehilce runs fine and never misses while driving
Oil pressure has nothing to do with the fuel systems on this truck.
There is quite a bit more to those POS pumps other than the PMD. You may also have a faulty speed sensor inside the pump. There is no science to these trucks. Check the following:
Fuel pressure, filter
If you still have a problem, check the injectors, I am sure they have a bit of mileage and could have excessive return.
Finally, pull the pump and get it rebuilt or tested; it can be an expensive test.
Those Stanadyne pumps are garbage. More than 40-50k out of one and consider yourself lucky.
The oil pressure sender controls fuel cut off on these trucks
The oil pressure sender controls fuel cut off on these trucks
What he said. 94-95 6.5's use a POS oil pressure sensor that actually powers teh fuel pump when teh engine is running. 96+ use teh ECM to trigger teh relay. the OPS is a COMMON failure point on OBD1 6.5's. Quick check is to open the water drain while it is idling hot and see if fuel comes out or not. If it stalls then the lift pump is not working and most likely the OPS has failed. Use ONLY an AC DELCO OPS, and I HIGHLY reccomend a relay installed inline to carry the load instead of the OPS.
I tried changing the sender on the block and it didnt change anything but ill try that