Engine is had starting, idles extremely rough, no accel. at all.
2000 dodge 2500 2wd, 5.9L 24V TDL, auto tran. Truck was running when I killed it and changed fuel filter. It would not start. Lift pump was bad. Towed to diesel mech. Mechanic installed new l/pump, bled air, etc. He said the only way he could keep the truck running (rough with no acceleration) was with a charger(boost) on the left battery. They don't work on electrical problems. He felt the inj. pump was okay. Towed to dodge dealer. Dodge dlr said the injector pump was bad ?? ''STOP'' Towed to back yard before I have 5 or 6 thousand dollars wrapped up in a 9 thousand dollar truck. This lift pump installation has blown up in my face and I need to take a breath. Do I really have an electrical problem? Can a bad PCM, etc. make it appear the pump is bad on diagnostics? I ran a scan myself twice. The first time = P0251,P0252,P1688. Erased codes, pulled neg. cables for 30 min. Started engine. It ran about 20 seconds. The second scan = P1688 only. Should I pull the PCM first and have it checked ? Is it possible that the inj. pump and an electrical problem exists simply from changing the lift pump? I'm hoping someone out there has had a similar problem and would throw me bone.
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if now it won`t start it could be a spark(ignition)problem, check for spark at the plug. you should check for a code in the pcm this may help, not all codes set the check engine light. could also be a bad fuel pressure problem.
This truck has problems with the cover inside intake leaking vacuum and causing rough idle and oil usage , its hard to say what your problem is with out testing, have you had the check engine light scanned for codes? what year is this dodge?these also had intake leak problems. try starting the engine and let it idle and then with some carburator cleaner spray around intake gasket and see if idle changes if it does then you have a intake gasket leak, another problem may be a leaking injector, try some sea foam in the gas tank and run a half tank of gas and see if that helps, otherwise a fuel injection system cleaning would be the way to go but this is only if its an injector problem, if this truck is 1996 or newwer have the computer scanned at an auto parts store for any codes. if there are codes let me know what they are even list the code and #. good day
intermittent lean condition may be caused by leaking intake manifold gaskets. Get some carb cleaner and start the truck. Open the hood and spray carb cleaner on the intake manifold gaskets. If the engine reacts at all, you have a gasket leak. If you have questions, please let me know.
ROUGH IDLING CAN BE CAUSE BY MANY THINGS.I AM LOOKING AT LEAKING VACUUM HOSES OR INTAKE MANIFOLD GASKET LEAK.DIRTY FUEL INJECTORS AND WORN ENGINE VALVES WILL CAUSE ROUGH IDLING.ALSO LOW IDLE SPEED CAUSE ENGINE TO RUN ROUGH.
do a pressure test on the fuel pump. if that tests ok then check your sensors. is it shooting a code (service engine light)? Oxygen sensor at back of cat. converter, crank shaft sensor or throttle position sensor. Unfortunately sensors are hard to trace. These are the suggestions I recd. for my bravada. it idles great but dies about every 1000 feet or so while driving. cut it off and re-crank and go another 1000-2000 ft. and do it again, will start running rough until you kill the ignition and restart the truck. pretty sure mine is a weak fuel pump.