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1983 Chevrolet Pickup C20 7.4L Always Full Advance
Set base timing with vacuum to advance plugged off - to 4' BTD @ 700 RPM. Hooked up vacuum gauge to vacuum advance to test advance unit did not move. Replaced defective advance unit, pulled vacuum and got advance. Hooked up vacuum line at idle I got an immedia...
FIX posted 9/12/2002
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Message Closed w/FIX
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9 Replies Received
9 Replies Received
| VIN | [No VIN Available] |
| Engine | 7.4 L / 8 cyl / GAS |
| Trans | 3-speed Automatic |
| Delivery | CARB / Original 4 bbl Roch Quadrajet |
| Emissions | Fed |
| Symptoms | Always Full Advance |
| Occurs | Idle |
| Misc. | Heavy Duty Tow Set-Up, With Duallies |
Message Closed w/FIX
Vehicle Data
1983 Chevrolet Pickup C20
| VIN | [No VIN Available] |
| Engine | 7.4 L / 8 cyl / GAS |
| Trans | 3-speed Automatic |
| Delivery | CARB / Original 4 bbl Roch Quadrajet |
| Emissions | Fed |
| Symptoms | Always Full Advance |
| Occurs | Idle |
| Misc. | Heavy Duty Tow Set-Up, With Duallies |
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