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How to set timing is NOT in the shop manual. I would assume like any other TBI EFI engine there is a wire that you must disconnect to bypass EST. Don't know which one or where it is on my 82. Shop manual is incomplete as usual.
From: At my Bar drinking and wrenching in Lafayette Colorado
It's a single tan wire with a black stripe that breaks out of the harness with an exposed disconnect connector. Driver's side in the area between the brake booster, valve cover, and firewall. You must disconnect it to set timing. Suggest you bump the timing spec up at least 2 degrees from the stock setting.
Here is the connector on the Chevy trucks - you can see how obscure it is:
Unfortunately I do not have one (early production 82 ). My EST wire is solid from distributor to firewall. I am assuming it is the caramel brown wire with black stripe coming out of my distributor. I guess I could cut that wire and make my own connector? I guess GM didn't want anyone messing with timing on crossfire cars or balancing the throttle bodies or messing with fuel pressure!
*I have also fried my tachometer somehow (pegged at 7000 RPM) (must have grounded it).
Last edited by Mikey1339; Jan 14, 2022 at 08:08 PM.
From: Arizona - If you don’t know CFI, STOP proliferating the myths around it...
On an 82 it is exactly like Lars has pointed out. Same position as well, drivers side between dizzy and MAP sensor near the firewall, its there, but may have to dig for it to find it. It IS a one wire connector exactly like pictured. GL
Both Buc and Lars are correct.......but I like to bump the timing from 0 to 4-5 degrees......massive difference in response and low end torque........
I ran up to 6 degrees on my TBI equipped 92' Camaro but you have to move the AIS sensor and mount the knock sensor in outer space to avoid ECM nanny from pulling timing upstairs.....
High mileage cars/trucks run great with 6-7 degrees due to timing stretch.....this also helps injector timing as it is triggered by the distributor as well.....the distributor is the "cam sensor" on this old stuff....
From: Arizona - If you don’t know CFI, STOP proliferating the myths around it...
Originally Posted by Jebbysan
Both Buc and Lars are correct.......but I like to bump the timing from 0 to 4-5 degrees......massive difference in response and low end torque........
I ran up to 6 degrees on my TBI equipped 92' Camaro but you have to move the AIS sensor and mount the knock sensor in outer space to avoid ECM nanny from pulling timing upstairs.....
High mileage cars/trucks run great with 6-7 degrees due to timing stretch.....this also helps injector timing as it is triggered by the distributor as well.....the distributor is the "cam sensor" on this old stuff....
Jebby
Both 82/84 corvette GM spec is 6* BTDC. If you go to 8*, you should be OK. I used to run 10* when mine was stock with no issues. If it does knock, drop it 1* at a time until no knock. My 383 is another story and run 12* now and runs like a BOSS!
Both 82/84 corvette GM spec is 6* BTDC. If you go to 8*, you should be OK. I used to run 10* when mine was stock with no issues. If it does knock, drop it 1* at a time until no knock. My 383 is another story and run 12* now and runs like a BOSS!
My bad...the later TBI stuff was all 0 degrees spec from GM.
So Lars/Buccaneer, is there any advantage to setting at 8 for a completely stock, softly driven 82? They seem to run pretty good at 6 on easy afternoon drives around town. Are the gains only realized in the higher demand ranges?
1982 Timing Where is EST Disconnect
