C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Timing and EST

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Old Apr 5, 2002 | 03:02 PM
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Default Timing and EST

I was going to reset my timing, so, as the book instructed, I disconnected the EST(Man was it hard to find, stuffed down below the distributer...don't know how I'll ever get it reconnected...), but now the car won't start....I get spark, because I can see the timing light light up, but no start. It started fine when I had the EST connected, but now it won't. I needed to set the timing because it had started to run a little sluggishly.......any help appreciated........ :bb
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Old Apr 5, 2002 | 03:54 PM
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Default Re: Timing and EST (mk842766)

I'll take a stab at this one. Are you sure you unhooked the est wire?? The est plug is a single wire unit and on most of our cars it is more over by the wiper motor than under the distributor.
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Old Apr 5, 2002 | 04:22 PM
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Default Re: Timing and EST (Bob86ZZ4)

You probably disconnected the red wire near the batterey. I don't know what that's for, but it's a :nono: to disconnect. I did the same thing and my car wouldn't start either. The EST connector is to the left of the brake booster, tucked in the harness. It'll take a little effort to find but it's there. :cheers:
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Old Apr 5, 2002 | 04:31 PM
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Default Re: Timing and EST (NUckINg FuTS)

Thanx....i'll go look again, and keep trying...... :)
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Old Apr 5, 2002 | 04:32 PM
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Default Re: Timing and EST (mk842766)

You probably disconnected the wrong wire. It was a brown one in my case (86 coupe). It should be very easy to locate, disconnect and connect.

--John
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Old Apr 5, 2002 | 04:36 PM
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Default Re: Timing and EST (mk842766)

If you used the official service manual it displays as the EST connector a bigger connector behind the distributor. I believe through this connector not only the EST signal but all electricity is routed to the distributor - hence no spark and no start if you disconnect it.

Like it was said the EST single wire connector is near the brake booster in a bunch of other wires. It is the only connector visible there.

My Haynes manual displays this correct connector. Wonder what they mean in the service manual???

Good luck for reconnecting... ;)

ToniH
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Old Apr 5, 2002 | 05:27 PM
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Default Re: Timing and EST (NUckINg FuTS)

got it!!! thanx guys!!!! :crazy:
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Old Apr 5, 2002 | 07:33 PM
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Default Re: Timing and EST (mk842766)

So, do I get an award since I was the first one to come up with the answer that all 15 of you have added tooooo??
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