1998.5 dodge diesel 24 valve new lift pump won't start if the engine and weather is hot running temp will turn over but wont start

donbigblock
0

Asked by donbigblock Jun 28, 2012 at 11:26 AM about the 1998 Dodge Ram Pickup 2500 Laramie SLT 4WD Extended Cab SB

Question type: General

in the winter the truck starts fine  in the summer it wont start if it is hot outside it turns over fine  the truck has a new lift pump  there is no codes on the dash

3 Answers

Jake Richardson
215

this is a hard one without seeing it haha. my guess just a possibility is maybe fuel getting a vapor lock before it actually gets to the motor. have to checked to see if you get fuel at the injectors. (line going into valve cover) crack one and see if your getting fuel when you crank it. may possibly have a weak injection pump? try that and get back with us and hopefully someone else can throw some other ideas out there to you also.

1 out of 1 people think this is helpful.
Dan Connell
7,105

Your bleeding down fuel pressure some where, prolly from the return side of the pump. fuel goes in, circulates around the pump internals, then gets fed to the delivery lines and injectors, some also goes out the return and back to the tank. on these Vp44 pump trucks its very likely that your leaking from the return side of the pump. The VP44 fuel system isnt a self bleeder like a common rail, due to the fact that fuel pressure drives your injectors not a electronic solenoid.

2 out of 2 people think this is helpful.
thejeepdoctor
3,415

I bevieve there is a tsb to add a fuel pump into the tank

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