okredneck

Apps reset solved the problem thanks for the y'all

Will do

The only other thing I could think of is an injector problem since it almost feels and sound like I've got an injector line cracked open slightly on one cylinder but I've checked for leaks and haven't found any so I know its not a fuel leak.

When I first noticed it I immediately thought I would be replacing another IP but I'll reset the apps in the morning and let y'all know what happens.

I dont try to lug my truck but with how its geared if I'm in 3rd I'm running 2000 rmp @ 30mph so unless I'm loaded down I'll leave the truck in 4th and coast through town. It only happens when I lightly accelerate but when I give it a little more peddle to go from 30 to say 45 it doesn't do it at all. My FP line is connected to the injection pump and hard lined to the gauge. I know its not the best setup with out an isolator but I haven't had a chance to fix it. And yes I've had the cables loose to repair the extension line and again to replace the alternator so twice in the last few days and I never reset the apps. Didn't even think about that. Thanks

I'll replace it and see what happens.

No I didn't replace the relay it still works fine it closes as soon as I hit the key.

It did blow the fuse. I bought the harness of eBay and for the last few years its worked great so I dont think its the harness. I didn't mean fried as in melted or caught fire but it started blowing fuses every time I would hit the key and kick the pump on. I narrowed that problem down to the plug on the extension harness so I cut off the problem plug and replaced it with the plug from the factory pump I had saved as a spare.

The only reason I'm not sure its related to the fuel pump is I dont get any fluctuations in fuel pressure when it does this. I've got a mechanical gauge for fuel pressure and the only movement I see in it is when I press the skinny peddle. The last time it did it today FP was at 16-17 psi and being in 4th gear I was running about 1100-1150 rpms @30 mph. I'm definitely gong to look into the plug since I used the old plug off the factory pump to repair it.

Its been 3 years since I put the lines on but I remember the lines were one size larger than stock and I was assuming the stock lines were 3/8ths. I'll look in the morning though.

It shorted out on the extension harness in the plug that connect it to the engine harness. The extension harness I used has a relay on it is o provide power to the pump directly from the battery so all the factory wiring does is control the relay.

No it didnt

Changed the fuel filter last month and I do have gauges(fuel pressure and pyro) but as far as I know the injectors are stock and I've never ran a programmer or box on it. The only upgrades I've done have been the fass ddrp pump and 7/16 fuel lines. Also the fuel pressure doesn't drop when it does this it stays at about 19 psi at idle and 15 going down the road

Fass ddrp fuel pump. Its a slightly better than stock fuel pump I bought when I replaced the vp44 about 3 years ago.

I've got a 2002 2500 5speed that's developed a vibration or a miss under light acceleration. This all started after the wiring fried on my relocated ddrp. I've said since repaired the wiring but sometimes the truck acts like it has either a leaking injector line or its getting air in the lines. However its only noticeable at 30 mph in 4th gear putting through town. I dont have any codes except for a p0177 and I know there's no water in the tank or lines. One last thing as soon as I accelerate or downshift to raise the rpms it goes and away. Any help or suggestions would be greatly appreciated. Thanks