Setting timing question

[Couger1968]

Re: Setting timing question

Sorry for a hijack, but I see a similar thing. Is this why when I set timing with the wire disconnected at 0 then reconnect and check with a hand held scanner and an adjustable timing light at idle there is 4 or 5 degree difference. Example timing on the scanner said 29 and it is actually 33 with the light. Should I set it actual timing or keep setting it with the wire disconnected and 0. I have a msd box and knock off distributor, with a ac Delco D1943A module.

I swapped out my ignition module back to my factory one. The timing is perfect again. Ac Delco D1943A must not the correct one for our trucks. Does anyone know what would be the correct one is if I had to replace it?

 

[SY2932]

Re: Setting timing question

I swapped out my ignition module back to my factory one. The timing is perfect again. Ac Delco D1943A must not the correct one for our trucks. Does anyone know what would be the correct one is if I had to replace it?

Get your OEM part numbers from the old syty data base. You *can* use a chain store, AutoZone, Advance Auto, etc., Wells number DR140 but my experience with them is they don't last as long as the OEM ones.

 

[Couger1968]

Re: Setting timing question

I did try to use it, but the numbers are obsolete. Then when you try to use alternative numbers, one of them lead me to the D1943A. My factory one works fine, but I didn't want to put a 20 year old part in a new distributor.