Engine/Transmission (1998.5 - 2002) ECM or pump????

[woodsrat]

have a truck in my shop thought it was just a lift pump. replaced it and now have these codes. PO253, PO251, PO252, P1688. What do you think is it the ECM or the board inside the VP???

 

[Graphic man]

it don't sound good Chuck!!!!!!!

 

[R-N-R]

P0251 Fuel Injection Pump Mechanical Failure Fuel Valve Feedback Circuit

P0252 Injection Pump Fuel Metering Control "A" Range/Performance (Cam/Rotor/Injector)

P0253 Fuel Injection Pump Fuel Valve Open Circuit

P1688 Internal Fuel Injection Pump Controller Failure

 

[Graphic man]

P0251 Fuel Injection Pump Mechanical Failure Fuel Valve Feedback Circuit



P0253 Fuel Injection Pump Fuel Valve Open Circuit

P1688 Internal Fuel Injection Pump Controller Failure

whats you point Bill :-laf :-laf :-laf



is it broke or not?? :-laf :-laf :-laf







Scott

 

[R-N-R]

Looks like the VP is fubard. A classic symptom of the ECM failure is the CEL light, there is also a code for a failed ECM (you would think I could remember that one).



I woud definately check/clean the LP, ECM, VP connections first.

 

[tareynolds]

forgot this

make for sure yor engine contoller connections and all the trucks grounds are good, if they are you need to look at the connection at the pump module, i have seen this connection come loose on several trucks, mostly if it has been taken off before, possibly not fully seating .

 

[woodsrat]

thanks for the replys. talked to proturbo99 on the phone and he told me how to test for the ecm, it was good putting in a new VP in the morning. told the customer how much for the pump when he got off the floor i offered to buy the truck :-laf :-laf he went with the pump.

 

[Vulcan]

Sell him a fuel pressure gauge and keep him off that floor. :-laf

 

[pro99]

Hey Chuck did you get it running yet?

 

[woodsrat]

yea got the truck back together runs fine now till the next thing they break. thanks for the help chaz.