Engine/Transmission (1998.5 - 2002) Another Lift Pump Question

[wes reeves]

Over the last few days my truck has been taking several cranks to start as opposed to the usual 1/2 to 1 crank. Today I noticed the lift pump did not cycle when I turned on the key. I bumped the starter and the guage jumped up to 15 for an instant and fell back down. Not the typical 20 second cycle. Once I start the truck it idles at 14 PSI and I can pull it down to 9 PSI at WOT. Is my lift pump dying?

 

[GLASMITHS]

My 2c would be to change the fuel filter first. If that does not help, then perhaps you do need a new pump. How many miles on the pump?

 

[wes reeves]

About 66,000 miles on this lift pump. I'll try the fuel filter.

 

[GLASMITHS]

There has been a lot of posts regarding the lift pump failure. I just changed mine at 107,000 miles although the old one was still good with 12 idle/7 wot. Now I have 17/12. That is the same pressure that it had for 3 1/2 years. It just needed changing . Just did not want to do it on the side of the road.

 

[wes reeves]

I changed the fuel filter and it sort of fixed the problem. Now the lift pump only cycles before the truck starts after the truck has been sitting for a while. Still the same fuel pressures. I'll go ahead and change the lift pump pretty soon and carry the current with me as an extra.

 

[GLASMITHS]

My experience with the plugged filters is that if the fuel pressure reading jumps at least 1psi you best keep an eye on it. If the warnig light comes on once I start looking for someplace to stop.