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  1. #1
    Sr. Mechanic Ethan's Avatar
    Join Date
    Sep 2009
    Cedar Park, TX

    Default Timing Advance issues and a Performance Chip for 1994 Chevy

    So my 94 is having what I think is timing issues concerning the timing advance. The truck stays constantly 20 degrees advanced at idol and under heavy load and anything inbetween. My MPG is lacking and it is lacking power under heavy load starting off the line. The truck is timed correctly, disconnected the wire under the dash to time it and everything. Is this normal or is something wrong?

    Also, I'm looking into a performance chip to help with MPG's and power. To me after I give it past 50% throttle it feels like the fuel is being limited cause the truck wont give anymore after 50% throttle.

    What kind of chip should I look into? I've looked at Jet Chips but they wont respond to any of my question.
    1994 Chevy Silverado 1500 Ext Cab 350 cuin TBI in dark Chevy blue
    160,000+ miles
    Original paint
    Original interior
    Original engine and tranny
    wrecked twice stolen once
    Diamond Plate bed rails
    Power windows
    Original Alloy wheels
    Original fancy smancy cup holder
    Tow package
    Original plastic bed liner
    K&N Cone Air Intake
    Dual MagnaFlow exhaust(not true dual) with chrome tips
    MSD Street Fire Performance Ignition coil

  2. #2
    Sr. Mechanic Ethan's Avatar
    Join Date
    Sep 2009
    Cedar Park, TX


    Anybody? This is proving to be a real issue. If ya'll need more information, I've replaced all the sensors, the map, coolant temp sensor, IAC, TPS sensor. The only sensors I didn't replace were the O2 sensor, and knock sensor because they are sending back the correct information. Transmission is also new and working perfectly.

    Is it possible when I did the intake manifold gasket that I moved the distributor off one tooth and stabbed it wrong? It felt like it was keyed cause it only went in 2 ways, the correct way and 180 degrees off.

  3. #3
    Master Mechanic zigger215's Avatar
    Join Date
    Sep 2011
    Fairbanks, Alaska


    First off, getting a chip or a programmer BEFORE you solve the real issue is a terrible idea. Second off, replace the inline fuel filter.

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