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Try Doc Rebuild

Okay E4ME Gurus. I have found descrepencies in the manual on E4ME settings. I just went thru mine. Float, .420" Idle mix 3 1/3 turns out M/C sol 3 1/2 turns out M/C travel 3/32"\ TPS, .46 volts at curb idle, from B to C Idle bleed screw at 30* dwell Runs good. Idles a little erratic.;squint:

1 is Yellow. The other is purple w/ white tracer

GM Quadrajet

If your leads are long enough, read voltage from battery - term to term E

I ran an HEI on my 76 pick-up for 20 years without touching the timing. GM engines are designed to run at 36* advance at 2,500RPM, period. When running under light load, they can take up to 52*. a 16* vacuum unit automatically controls this.

Coolant sensor/ Don't believe everything you read. Okay. Doing diagnostics today. The book says if the coolant sensor reads over 1,000 ohms, replace it. It read 2,260 ohms. Bought a new GM one today. $42.00. Guess what. 2,260 ohms. WTF? Anyone else notice this?:confused

I am doing computer diagnostics today. If I see it, I'll let you know. Pull the driver's side console cover, the one with carpet. See where it goes. E should def. be "chasis ground". When you read this 12 volts, where are you measuring from? Batt ground? Where?

Do you have the Helms GM shop manual, or the quadrajet book by Doug Roe?

A-Carb sol. (same as green test lead) B-Check engine light C-Air control (Diverter valve) D-Diagnostic enable E-Chasis ground I do not know the value of D. I am quite sure it is 2volts or less

Okay Cris. Do me a favor. Do you have a dial back timing light? Chart the curve for me sometime. Then I can make an edified decision. Idle 500 1,000 1,500 2,000 2,500 3,000 Fair enough? (P.S. Name one performance/race car with an 81 computerised carb)

Okay. Two places to check(That I know of). Engine ground. Pass side, block to frame. This one is rather large. Front of carb. There are two wires to the M/C , pass side, a green clip for testing dwell, and a ground wire to the carb. It should be black.

That's a point we will never agree on. If you change to an earlier quadrajet, and put a proper curved vacuum HEI in there, Big difference. Cam? GM 181. Gears? 3.73.. This puts them back to where they were before. 3.08 and 2.79 coupled with ECM is about MILAGEand EMISSIONS, not PERFORMANCE.

If you do not have smog inspections, pull that crap off. Cheapest bang for the buck, change rear gearing. It probably needs going thru anyhow. After that, change the cam.,then...........................;LOL

The choke is not controlled by the ECM. The only commonality here is the engine and ECM grounds. Start there.;)

Your ahead of the game. You won't be in trouble till you catch the dreaded "whileI'matIt"s." Then your done.:L

:ugh Wow. You definetely have a wiring problem. I have never heard of that one.

I would still change the solenoid again.;)

The starter brace has a small shield between the manifold and solenoid. However, the main root of the problem is the solenoid. Replace it with a Delco unit. Should solve it.

Thaanks Danny. Guys, if you can find this on E-Bay, buy it. It is only for the 81 computer systems. I guess the schematic page did not come thru.:L