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Originally Posted by potts200
Thanks for all of the replies. I haven't had much time experiment with it. Nobody I know has a scan tool so I may purchase one or see if I can't find a shop that will work with me and check what I want them to check. And of course alert me to any other problems they might see. I am going to pull the plugs tomorrow, clean them up and check the gap again. I am running AC Delco 41-932s with a gap of 0.060 in. That is what's listed on the emission sticker under the hood. I found some sort of GM Tech training manuel that says the 4.3L EDI distributor cannot be adjusted but on the larger V-8s it can. I under stand that timing can't be changed by moving the body but I agree with MT that by moving the dist. body that should bring the rotor and cap terminal in closer alignment at the precise firing moment. Has anybody acutally moved the dist. body with sucess and no codes thrown? Here is the link to the manuel; it's really a nice read for novices like me!
http://fsunw3.ferris.edu/~millerm/SWB_a8_m09_Final.pdf |
On adjusting some of the dist is where gm bits you in the rear.
Some are not adjustable. But where there is a will there is a way.
I have sloted the hold down clamp on some to be able to adjust them.
But you will need a good engine capable scanner to check and adjust them.
Good Luck MT.