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Old 02-21-2009, 01:17 AM
thaduke2003
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Default Truck dying- fuel pump? Please help :)

Hey all. My name is Mark- I'm a horse trainer and grease monkey by trade. New to the forums, but not to cars, Ma Mopar, and headaches.

My most recent headache is my fiancee's '99 Dodge Ram 2500 5.9L (360 gas). The truck has just about 70k of HARD miles on it. It was a municipal truck in AZ (I hadn't met her when she bought it, and don't want it to break us up already! ), and was never maintained.

A bit of background. Just did plugs, wires, cap, and rotor on the truck yesterday. The heat shields for the plug boots were FULL of caked-in dirt. Took FOUR hours to clean it all out and swap in the new bits. Lovely. The plugs were all worn down to 0.064"+ of gap. After this, however, the truck ran fine, and had decent power.

Today, installed a K&N Filtercharger kit. No problems there. Her stock airbox had been cracked, allowing lots of unfiltered air in, thus the intake. On first test drive, truck ran fine- nice new sexy power.

After driving for a bit, she mentioned the truck suddenly seemed to die on power going up hills. She wasn't kidding! I drove it home just now- up a MILD incline, I could barely get it above 30 MPH.
To my seasoned booty, it feels like it's hitting fuel cut/dying on fuel. The truck would barely rev past 3,500, and when I put my foot into it, it wouldn't give me anything more.

My first thought here is fuel pump crapping out.

Beyond what I think and feel, any ideas?

I've been a wrench jockey for years in the high performance field. I can tell you with near certainty that the intake is NOT at fault.



I would love for anyone to tell me I'm wrong (as long as they're not ), or that it's something simple. In the AM I'll go over my work, but I don't think it's at fault. I'll probably check compression and will certainly check the radiator cap in case it's a blown head gasket.



Are there any easy checks to test the fuel pump? Might try the old beat-it-with-a-hammer trick.

Also, it seems like a PITA to swap the pump- is there an easy way? I will likely be doing the work on my back in the snow, so any tips will be appreciated. Thanks in advance!

Cheers, and hoping to get some sleep Mark W.
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