Well for about a while now ive been experiencing the weirdest vibration ever:S ok so when the car is idling, car is sometimes vibrating..
When i turn on my hazard lights, the RPM starts to fluctuate and the car vibrates accordingly..and whenever i turn on my headlights, the car vibrates stronger than it usually does in idle, and the RPM gets lowered a bit..
The vibration is not the kind that comes from misfiring, it is a kind of a high frequency vibration..
Ive replaced my MAF, Spark Plugs (6 months ago), Fuel pump, fuel filter, cleaned throttle body, cleaned injectors, replaced the air filter, changed engine and tranny mounts..
Well me and my mechanic were diagnosing the problem and we came up with an idea, which was to let it idle without the timing belt on to see if the vibration was motor related of from the pulleys bolted on the motor..sure enough the vibrations went away..
Then we noticed my water pump pulley had moderate slack in it and was wobbling, so did the idler pulley..thus deducing that the water pump pulley and idler pullley was causing this annoying vibration..under the logic that whenever i turned on my lights and/or flashers, the alternator increased its load on the engine thus making the water pump pulley start vibrating..
Can you guys tell me if our logic is sound? If not, why did the car stop vibrating when the timing belt was removed? Thanks in advance guys! Im sure youd be of great help