Aug 10, 2008
- pinging can be caused by too much ignition advance, low octane fuel, carbon build up on valves, malfuntioning knock sensor.
the ignition timing is computer controlled, if the knock sensor detects knock(ping) , the PCM retards the igniton timing.
-a bad knock sensor is the most probable cause.
if you do the repairs yourself, the parts will cost right around $100 from autozone (intake manifold gasket, knock senor, RTV) and will probably take you 3-5hrs.
if you take it to a shop. you will be charged for 2.2hrs of labor (if they charge you for more hours, they are ripping you off) @ $80/hr (average rate) = $176
they usually mark up the parts atleast 2.5X and depending on where the parts were purchased cost between $100 and $170.
So i would estimate the average price you would pay @ $500
you could try de-carbonizing the engine first as this is a less possible cause. How? i would suggest
BG 44K® Power Enhancer®
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