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Re: Where is the knock sensor located? (radhunter)
Are you using a scan tool and data collection? If so and your knock sensor is bad, you will be able to see if you're getting a bunch of knock retard even when the engine is cold. (It would either be a bad KS, or something big causing false knock.) If your timing is jumping all over the place for no reason, check the end play on your distributor gear. If there's much play there, the helical cut gear is going to raise and lower, causing the timing to fluctuate. IMO, you need to collect data or you're going to throw money at it replacing stuff you don't need to.
[QUOTE] If your timing is jumping all over the place for no reason, check the end play on your distributor gear. QUOTE]
:iagree:
Thats what I was thinking
Thanks for the good advice. I've been wanting to get a scan tool just to play anyway, so I think I'll just wait until I do before I start jumping to wrong conclusions.
Re: Where is the knock sensor located? (radhunter)
Just to clarify, by scan tool I don't mean a code reader. I'm referring to a data collection program that will allow you to capture parameters over a protracted time frame, then play it back, slice it and dice it looking for anomolies. EASE makes a very good one. (OBD2.com) Get the version that works on both OBD 1&2, then you can use it on all your computer controlled vehicles, regardless of brand.
Re: Where is the knock sensor located? (radhunter)
You can test a knock sensor easily....
.... by one person looking at the harmonic balancer with a timing light and another person tapping on the engine block with a screwdriver handle or other non-damaging tool to simulate engine knock to the sensor. The timing should retard when the sensor hears the simulated knock.