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singles club 213!!!
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Discussion Starter #1
i have just recently purchased an 02 cummins traded it for my stroker but i was making a 1400 mile round trip and 400 miles out it started missing i was driving 80 mph and it has done it 3 times the engine light is on and the code is something about the inj pump it has a banks exhaust and a k&n ram air i think the turbo is stock but i only get 9.6 mpg i found that out after i bought it any help is apreciated thanks
 

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Senior Member
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1,189 Posts
sounds like you had poor fuel pressure which was starving the injection pump and wondeded of not killed it. best investment would be a fuel pressure guage once you get it all figured out. could have a bad ground to your lift pump as mine did and did the same thing. check fuel pressure first to know if your lift pump died.. sounds like someone may have known it was going out. 9.6 was that empty? I have never gotten under 11mpg with mine and it's a 4x4 and I was out wheeling and hauling that trip.
 

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2nd Gen Guru
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2,641 Posts
Traveling at 80 MPH your not going to do so great on MPG's anyways... Remember its a Dodge Cummins TRUCK (~7000#). It not a sports car... Drive like a white man and good number will come... I'm hitting now 20-21 MPG rather easy...



If you want better MPG's read this it works!
http://mopar.mopar1973man.com/2002 Dodge/Tips & Tricks/better_mpgs/mpgs.htm

As for the miss... I bet money 01quadcab is right your lift pump had died on the fly starved the injection pump and now the damage is done.

But here is the diagnostics for it...
http://mopar.mopar1973man.com/2002 Dodge/Tips & Tricks/lift pump/lift pump.htm
(MINIMUM FUEL PRESSURE AT WIDE OPEN THROTTLE IS 10 PSI)

So if you got to replace the injection pump here is the instructions...
http://mopar.mopar1973man.com/2002 Dodge/Tips & Tricks/VP44 replacement/vp44 replacement.htm
 
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