Engine/Transmission (1998.5 - 2002) Can't start hot

[bajapilot]

Anyone have any ideas on why I have trouble starting when hot. This began just after I replace a lift pump that was only putting out 4 lbs pressure. Probably coincidental but I don't know.



When cold the truck starts just fine. After it heats up then becomes hard to start requiring much cranking. If I let it cool back down it will crank right up again.



Truck is a 99 in stock configuration. Thanks in advance.

 

[GregFisher]

very common problem, probably blown diaphram in vp44. give ken imler diesel or orangevale diesel a call they can help.



thanks, greg

 

[AKAMAC]

Sounds like an air leak. Check the input fuel line at LP (loose or bad copper washers) and flex lines for cracking.

See if you have any codes. I hope your VP44 is OK.

 

[KKunz]

my 98 did the same thing, right after a lift pump change then a week later a new vp44 now no more hard start.

 

[djacy99]

I would think the vp44 is the problem. If it was a cold start problem then I would think air leak.