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Re: spark plugs, dist. cap, etc. etc. 700 1988

posted by  someone claiming to be Tim K. on  Fri Nov 10 15:14 CST 2000 [RELATED]

I guess I'll address the knock that you said you hear at acceleration. I too have this octane/ knock symptoms. I have found (through research on the board) that if there is a problem with the knock sensor (ie: either the sensor or its connector) you will experience sluggish performance and hear a pinging on acceleration. It was also suggested to test this out in two ways: pull the connector off the knock sensor and see if there is a noticeable difference, or change octane levels (as you did) to see if there is a difference, or tap with a hammer (next to the sensor, on the block) to see if you hear the engine retard the timing.

Also, if you suspect that the formentioned ingnition components are old or bad, replace them first (as any highmileage maintainance would suggest). Then, if you still have the pinging present, check into the knock sensor.

This is the approach I will be taking. I tried the octane switch from 89 (middle grade) to 92 and I eliminated alot of the pingning but not all of it. So, I'm suspecting those two areas as the problem.

As always, this is just my 2cents. I hope this helps.





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