I SEEM TO HAVE AN OCCASIONAL PINGING OR RATTLE COMING
FROM THE ENGINE COMP'T. WHEN I'M DRIVING NOT ON IDLE,
ONLY WHEN I STEP ON THE ACCELERATOR AND NOT FULL THROTLE. I HAVE USED SUPER UNLEADED GAS BUT IT STILL OCCURS.I AM NOW USING REG. UNLEADED.I HAVE 99,360 MILES ON.NO ONE CAN PUT THEIR FINGER ON THE SOURCE OF THIS NOISE.PLEASE HELP, TKS
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Re: ENGINE OR EXHAUST OCCASIONAL PINGING OR RATTLE
Your coils are weak. if you are using premium like you saying that you are, than I would look at your coils. do your coils have a gray dot on top?? if not, than put new coils inthere (with gray dot) and plugs, since those are due at 105k and you are almost there. coil life expectancy in a maxima is about 60-70k miles. Is the check engine light on?? if so what is the code??
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Ahhhh..the Sporty has a rattle...or is it a ping? If your popping through the exhaust, the timing could be off and running rich (Check Spark Plug for dark sooty layer) If your engine is pinging could be advanced timing... pre-ignition happens on acceleration or under a load...loose valves will make noise all the time
Do you have the CV Keihin still? Or are you running an aftermarket carburetor ? Like an S&S?
Might be Exhaust, but if Exhaust is loose , you usualy here a rattle when you are also driving the car on the road. Best to take Car to local Repairer , put Car on ramp , and take a look , as it could be something else that Rattles.
If the engine knock is coming from deep inside the engine, the I agree, the rod is knocking. If the sound is coming from closer to the top, it could be a valve lifter or push rod you are hearing. This isn't as bad, they last longer and synthetic oil or oil treatment helps. If this doesn't happen all the time, if it's occasional or you hear a pinging noise, you could just have a bad knock sensor.
it is the exhaust actually cooling down, this is fairly normal especially in brand new vehicles or vehicles with new exhaust. the metal used in the exhaust expands with heat you shut the car off and the heat goes away so metal contracts. nice car by the way, my neighbor around the corner just bought a black one. good luck
I had the same problem! I crawled underneath the car and discovered that a heat shield on the exhaust header pipe was corroded and rattling against the exhaust pipe. (Before the muffler) I removed the portion and clamps and solved the problem. Give it a try.