95 Yukon 2 door. 300,000 kms - so engine is a bit tired. vibrations while accelerating - really bad when going up a fairly steep hill starting at the bottom with a low speed. RPMs seem to stall for a split second and it feels like there may be a problem with the exhaust, but I've heard it could be a distributor problem. Taken it in twice, and mechanic can't seem to find it. otherwise running sound.
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This sounds like you might have a bad plug wire or something else in the ignition system is arcing to ground. A quick way to verify this is to run the truck in Park at idle. Next, spray the ignition wires with Windex. You'll notice the truck starting to rough up and might even see the bad wire arcing to ground. A complete tuneup would be recommended in this case.
I hope this helps! :)
it could be just about anything. first start by checking plugs, wires, and coil.Engine hesitation, which is normally most apparent during acceleration, is a condition that often results from either abnormal fuel flow to an engine or abnormal electrical conduction to a vehicle's spark plugs. Bad spark plug wires, whether they degrade internally or develop cracks and breaks in their outer coverings that cause electrical interference, can cause an engine to hesitate. Engine Surging, Engine surging is a common symptom of bad spark plug wires, especially if the wires have cracks or breaks in their outside insulation, heres the symtoms for a bad fuel filter. Engine Hesitation, Engine Stalling, Rough Engine Idle, Reduced Engine Power. if really plugged it will stop fuel flow and car will not start. just give it a good tuneup, and go from there! good-day!
The cam shaft sensor operates the speed and spark of the engine without it work properly the car will shake and will not run good. It will run rough and will hesitate and may even cause more damage if continued to operate in this state. Cam sensors are not expensive anyhow anywher from $50 to $150 good luck
Does the car always hesitate during acceleration? If it ALWAYS struggles when it starts or ALWAYS hesitates on acceleration then I would say the issue is fuel delivery. If the problems are more intermittent and come-and-go then it could be an electrical issue.
I would start by changing the fuel filter. Changing plugs, wires, cap, and rotor are all good things to do as your budget will allow. I doubt you will have to change your injectors.
If you end up replacing any rubber fuel line, be sure to use the high-pressure stuff made for use on fuel injected cars.