Timing question
Thread Starter
Cruising
Joined: Aug 2014
Posts: 14
Likes: 0
Timing question
What causes your engine to get out of time? I have a 1985 L98 with a 4+3 - bone stock. 37000 original miles. I checked and adjusted the timing to-day. It was was off. I'm just curious how it got out of time? Thanks, Steve.
Thread Starter
Cruising
Joined: Aug 2014
Posts: 14
Likes: 0
The factory setting is 6 degrees BTC. It was on the BTC side, but well outside of the marks. I would say at the a finger width before you got to the scale. I'm just curious about what would make an engine jump time like that.
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
Not unplugging the EST connector before checking the timing. The ECM will advance the timing to 20°. Unplugging the EST connector disconnects the ECM from the distributor.
Thread Starter
Cruising
Joined: Aug 2014
Posts: 14
Likes: 0
So basically, I checked the timing incorrectly. As a result, got an incorrect reading. I got my FSM out and followed that procedure to set the timing and corrected the drivability problem I had. When I go to check timing again, I need to un-plugg the EST. gotcha. Thanks for the help. I was worried there may have been a mechanical issue causing the out of time situation.
