timming a 1990 L98
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
Unplug the EST connector.
Connect timing light to spark plug wire #1.
Loosen distributor hold down clamp enough that distributor can be rotated.
Start engine.
Shine timing light at harmonic balancer and move the distributor until the harmonic balancer line aligns with the 6° mark on the timing tab.
Tighten distributor clamp.
Recheck timing to make sure the distributor wasn't accidentally moved while tightening the clamp.
Connect EST connector.
Having the EST connector open while the engine is running will set an error code 42 and the Service Engine Soon light will come on. You can ignore this and the SES light will not show up again or you can reset the ECM to clear the error code.
Connect timing light to spark plug wire #1.
Loosen distributor hold down clamp enough that distributor can be rotated.
Start engine.
Shine timing light at harmonic balancer and move the distributor until the harmonic balancer line aligns with the 6° mark on the timing tab.
Tighten distributor clamp.
Recheck timing to make sure the distributor wasn't accidentally moved while tightening the clamp.
Connect EST connector.
Having the EST connector open while the engine is running will set an error code 42 and the Service Engine Soon light will come on. You can ignore this and the SES light will not show up again or you can reset the ECM to clear the error code.
Thread Starter
Instructor
Joined: Mar 2013
Posts: 139
Likes: 0
Which is the est connector. Is it the big plug behind the distributor. If so, I disconnected it and tried starting the car. It didn't want to start.
Unplug the EST connector.
Connect timing light to spark plug wire #1.
Loosen distributor hold down clamp enough that distributor can be rotated.
Start engine.
Shine timing light at harmonic balancer and move the distributor until the harmonic balancer line aligns with the 6° mark on the timing tab.
Tighten distributor clamp.
Recheck timing to make sure the distributor wasn't accidentally moved while tightening the clamp.
Connect EST connector.
Having the EST connector open while the engine is running will set an error code 42 and the Service Engine Soon light will come on. You can ignore this and the SES light will not show up again or you can reset the ECM to clear the error code.
Connect timing light to spark plug wire #1.
Loosen distributor hold down clamp enough that distributor can be rotated.
Start engine.
Shine timing light at harmonic balancer and move the distributor until the harmonic balancer line aligns with the 6° mark on the timing tab.
Tighten distributor clamp.
Recheck timing to make sure the distributor wasn't accidentally moved while tightening the clamp.
Connect EST connector.
Having the EST connector open while the engine is running will set an error code 42 and the Service Engine Soon light will come on. You can ignore this and the SES light will not show up again or you can reset the ECM to clear the error code.
Safety Car
Joined: Sep 2001
Posts: 4,134
Likes: 531
From: Glenbeulah Wi
It is a single tan wire with a black connector located between the brake booster and the engine on the drivers side of the car. (Near the firewall)
Thread Starter
Instructor
Joined: Mar 2013
Posts: 139
Likes: 0
