My 1999 suburvan fuel pedal starts vibrating when the vehicle starts accelerating until the vehicle reaches 55 mph. I rotated and balanced all tires and will align the tires soon. The vibration persist
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Re: Vibration on fuel pedal of 1999 suburvan
This may be caused by bad motor mounts. Lift your hood and then start the engine. Put it in reverse and hold the brake. Push on the gas peddle and watch the engine. If it trys to roll over they may be bad. Be careful.
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Lift the vehicle engine, can see the bottom plate Kepeng traces. If the roadwith obstacles and forced through the bottom plate, the engine must beknocking. The bottom plate deformation and engine oil bottom shell distance, if the distance is too near, when accelerating oil bottom shell and bottom platecollision sends out noise and vibration. So, traffic must carefully observe the road, do not cause drag bottom phenomenon. remove thebottom plate, flat correction can be.Use obd2 for automotive diagnostics , you can improve vehicle safety performance and driving more safer.
Sounds like you need to get your tyres balanced. If the vibration is when you don't touch the brakes only between the 80-100. If its when you touch the brake pedal and the vibration occures, your disc brakes are warped, either machining or replacement.
CKP Sensor System Variation Not Learned
Set the parking brake and block the drive wheels for safety.Verify the hood is closed.Read the trouble codes. If a code is set, refer to that code.Start the engine. Allow engine temperature to reach at least 158?F (70?C). Then key off.Select Crankshaft Position Variation Learn procedure on Scan Tool & start the vehicle.Apply the brake pedal firmly and verify the selector is in Park.Increase accelerator pedal position until fuel cutoff is reached at the test rpm (e.g., 5150). Quickly release the accelerator pedal after fuel cutoff is reached. The CKP system variation compensating values are learned when the engine speed (rpm) decreases back to idle speed and the procedure terminates.Read the trouble codes and recheck for DTC P1336.If DTC P1336 runs and passes, the CKP system variation "learn" procedure is complete. If not, look for other codes. If no codes are set, repeat the test procedure.
check the drive shaft between the intermediate transmission and the front transmission for miss alignement and defectivness of the telescopics system of this shaft. we had about the same problem on our 1996 same model...
I would venture to say your exhaust is hitting your frame, or, you may need new motor mounts. The exhaust is what I would lean toward. If you can imagine your exhaust sitting under your vehicle, and the fact that the vehicle has a little age, the motor mounts probably give a little, causing the motor to move slightly on acceleration and deceleration, thus your exhaust is going to move, and may be vibrating on whatever its touching. Good luck.
It sounds as though your car has two seperate problems. The first problem with the vibration that goes away when you let off the gas pedal is caused by a bad INNER CV joint. It only vibrates when you are accelerating because that is when the joint is under stress. Your vehicle has two axles, each with an inner and an outer joint. My suggestion is to have a competent shop determine which is the bad side and replace the entire axle. The second vibration which occurs at any speed is most likely cause by either a bad tire, or a bent rim.