[sidclaim]

99 Nissan Frontier XE with 175,000 miles, 4 cylinder. It will start and runs fine below 40 mph with slight gas pressure it will vibrate like running through rumble strip. I had CEL and code P0302, cylinder #2 misfire. I already replaced plugs, wire, cap, rotor, fuel injector #2, flush coolant, and replaced transmission fluid and still vibrate. If I turn off the overdrive (OD), it will vibrate. Any had any experience like this or suggestion? It's very dependable truck so far.

 

[massbaster]

hmmm

have you thought of looking into the distributor and or timing chain? maybe some wear on chain or teeth of distributor maybe same on cam/crankshaft.


does it vibrate after 45? at 50 and maybe 60?


i sent you an message check the link....

 

[shakedownstreet]

being a speed based issue i'd guess it has nothing to do with the motor. your cel may be a coincidence

the only problem i had with my '94 hardbody that sounds similar to what you describe was the universal joints

 

[sidclaim]

have you thought of looking into the distributor and or timing chain? maybe some wear on chain or teeth of distributor maybe same on cam/crankshaft.


does it vibrate after 45? at 50 and maybe 60?


i sent you an message check the link....

The distributor was replaced and still vibrate at 40-45 mph while applying slight pressure on gas pedal. Above that speed, the engine is fine. My friend mechanic found a faulty EGR vacuum solenoid switch. He bypassed it and now no more vibration.