Timing question
Thread Starter
Drifting
Joined: Dec 2012
Posts: 1,504
Likes: 73
From: Georgetown TX
Timing question
89, L98, Auto trans, 49000 miles
I noticed while timing my car, it seems to idle better and faster when I advance the timing a few degrees instead of setting it at 6 degrees. Is there a down side to doing this. I did disconnect the one distributor wire. Does the engine have to be set in service mode and the IAC disconnected when timing? I have done the minimum idle adjustment by the book
I noticed while timing my car, it seems to idle better and faster when I advance the timing a few degrees instead of setting it at 6 degrees. Is there a down side to doing this. I did disconnect the one distributor wire. Does the engine have to be set in service mode and the IAC disconnected when timing? I have done the minimum idle adjustment by the book
Last edited by mlm0; Jun 15, 2015 at 12:19 PM.
Oil Producer
Joined: Apr 2014
Posts: 9,364
Likes: 2,734
89, L98, Auto trans, 49000 miles
I noticed while timing my car, it seems to idle better and faster when I advance the timing a few degrees instead of setting it at 6 degrees. Is there a down side to doing this. I did disconnect the one distributor wire. Does the engine have to be set in service mode and the IAC disconnected when timing?
I noticed while timing my car, it seems to idle better and faster when I advance the timing a few degrees instead of setting it at 6 degrees. Is there a down side to doing this. I did disconnect the one distributor wire. Does the engine have to be set in service mode and the IAC disconnected when timing?
then go from there. that way you know you are set correctly.
note that if you have an 85, gm called changed the base rpm from 450 i think to 500. cured some 85 issues.
cheers.
Le Mans Master
Joined: Mar 2004
Posts: 5,107
Likes: 171
From: Dublin CA
I played with the timing on my 85 and found thru trial and error that the engine liked 10 degrees better than the stock setting of 6. No real down side. This setting also responded better at the 1/4 mile track.
