Est Connector

[lasalcop]

I have a 94 K1500 with a 5.7L TBI. My problem is I cannot set the timing on my truck. I know you have to disconnect the EST connector to set the tming. When I re-connect the EST connector, the timing does not change. I have replaced the pick-up coil, distributor control module and the ignition control module. The problem persists. Now what?

[redvett]

Does the SES light work? If not fix it first the code is an important diagnostic tool. The knock sensor not working will set a code and retard timing.

 

I have a 94 K1500 with a 5.7L TBI. My problem is I cannot set the timing on my truck. I know you have to disconnect the EST connector to set the tming. When I re-connect the EST connector, the timing does not change. I have replaced the pick-up coil, distributor control module and the ignition control module. The problem persists. Now what?

[alwcurlz]

Does the SES light work? If not fix it first the code is an important diagnostic tool. The knock sensor not working will set a code and retard timing.

 

I have a 94 K1500 with a 5.7L TBI. My problem is I cannot set the timing on my truck. I know you have to disconnect the EST connector to set the tming. When I re-connect the EST connector, the timing does not change. I have replaced the pick-up coil, distributor control module and the ignition control module. The problem persists. Now what?

 

 

 

+1 Could be a knock sensor issue. I'd check to see what codes are coming up.