timing issues 81 vette
Thread Starter
Heel & Toe
Joined: Jul 2015
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timing issues 81 vette
Me again :/ got spark even had car running. Decent for. A bit after coil change and dropping in dizzy rerouting plug wires . Could get good initial start up but no performance on road like an idiot I adjusted the large flat head screw on top of quadrajet center in front part of the carb. About to go vacume advanced dizzy and get a elderbrock carb rip computer out just wanna drive two back to back days....1981 corvette electric carb
Safety Car
Joined: Mar 2007
Posts: 3,652
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From: Bridgewater nj
I don't know what you did to the carb but your timing sounds like it's too far retarded. When the choke closed at high idle will let it run but you'll have nothing aa far as power goes and when it warms up it will usually run much worse. Turn the dizzy counter clock wise about a 1/4 inch and see if it improves and try to put the carb screw back..
Thread Starter
Heel & Toe
Joined: Jul 2015
Posts: 17
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I don't know what you did to the carb but your timing sounds like it's too far retarded. When the choke closed at high idle will let it run but you'll have nothing aa far as power goes and when it warms up it will usually run much worse. Turn the dizzy counter clock wise about a 1/4 inch and see if it improves and try to put the carb screw back..
Race Director
Joined: May 2006
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did you try turning the distributor very slightly counter clock wise when you had the connector removed and were attempting to start the car?
are you using a timing light to set the timing?
was the distributor removed from the engine and reinstalled?
are you using a timing light to set the timing?
was the distributor removed from the engine and reinstalled?
Thread Starter
Heel & Toe
Joined: Jul 2015
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Yea I dropped in dizzy found top dead center made that numver one plug pointed rotor at it and then. By hand at the alternator I lined up the line with 0 on harmonic balancer that was of course days ago no damn clue where or what I'm screwin up now frustrating
Race Director
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if you found top dead center the 0 on the harmonic balancer should have lined up. Your timing is too retarded from everything you have posted. With the engine off, the 4 pin connector disconnected, rotate the distributor about a 1/4" counter clockwise and then try starting it. You never answered the question, are you using a timing light?
Thread Starter
Heel & Toe
Joined: Jul 2015
Posts: 17
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if you found top dead center the 0 on the harmonic balancer should have lined up. Your timing is too retarded from everything you have posted. With the engine off, the 4 pin connector disconnected, rotate the distributor about a 1/4" counter clockwise and then try starting it. You never answered the question, are you using a timing light?
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Thread Starter
Heel & Toe
Joined: Jul 2015
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I can't even get base timing using TDC to make it start I'm doing some step wrong or backwards do u make the mettle piece the rotor bolts to point at #1 cylinder after TDC is found or the rotor itself and witch end of rotor if so
Team Owner
Joined: Jan 2006
Posts: 37,637
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From: Crossville TN
If the ECM system on your '81 is still operational, IT sets the timing as needed, depending on inputs it gets from O2 sensor, etc. There is a specific procedure by which initial timing is set for the stock '81, and it can be found in the 1981 Chevrolet Chassis Service Manual (may not be called exactly that for '81, but it's the manual made for Chevrolet to depict each of the car's operating systems and how to maintain them). You can probably find that procedure on the web, too.
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Instructions
http://www.stl-vettes.com/65Vette/co...istinstall.pdf