Engine/Transmission (1998.5 - 2002) Truck will not start - lift pump not getting power

[John Berger]

It's been many years since I posted here, but I'm wrapped all full of codes and want to know if any of you good peeps know the "short" route solution for the following.



DBD gives the following codes



P0230 - Transfer Pump (Lift Pump) Circuit Out of Range

P1689 - No communication Between ECM and Injection Pump Module

P0336 - Crankshaft Position (CKP) Sensor Signal



Basically, the problem for me is it won't always start. First suspect is the Lift Pump, but a new Lift Pump does not resolve the starting issue. Intermittant, therefore not reliable. When it does run, it runs fine... . no loss of power, no defueling, etc. , etc.



Anybody else experienced this problem? Disclosure - I'm running a 2001 motor in this truck. A fuel injector cracked on the original motor and caused the motor to grenade before I knew there was a problem. So, if my sig is still good, it's a 1999 with a 2001 motor.



Thanks in advance.

 

[LNaugle]

Has the truck ever started? without going to my books i am remebering that somewhere like 01 the map sensor reference voltage changed from . 5 volt to 1 volt, and most 01s dont have crank sensor only cam sensor..... i am sure 1 of our other members can help us with that... . who swapped the motor? did they use your old ecm or ? As far as i know you cant do that swap w/o whole harness change... . We swapped a 98. 5 body onto an 01 and had to change everything to 01 to make rite...

 

[waltk]

I had a similar circumstance, transfer pump not running, with same codes on a '00,,, Had to replace the connector to resolve the issue. However, with a "franken-truck" ('01 engine in '99 body) the previous reply brings up concerns with which I have no familiarity... Your mileage may vary.

Walt K.