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  1. E

    coolant sender voltage and gauge issue.

    I have 12 volts on the green wire. The gauge runs to red over a few minutes of engine running not immediately. Maybe wrong sender.? I assume tstat is open as heater blows hot. Was just wondering if 12 v was normal. Looking at the schematics I figured it was.
  2. E

    coolant sender voltage and gauge issue.

    90 cheyenne 5.7 tbi 4x4 In re the coolant sender in the head, what is the voltage on the green wire that connects? in the course of tracking down a non functioning gauge. installed new sender and gauge redlines. t stat is new. thanks
  3. E

    Lights, fan, signals cause engine to spasm.

    hey. thanks for all your input. I've been traveling out of state and am catching up. So i replaced all the ground braids and cleaned up all grounds i could find. seems to have fixed the problem. as i now can run all systems without a hickup.
  4. E

    Lights, fan, signals cause engine to spasm.

    Hmm .. Well my e problem is on a back burner while i deal with a sheared t stat bolt. Engine was running hot and that can screw up the computer too. Also new sensors. Stay tuned..
  5. E

    Lights, fan, signals cause engine to spasm.

    Year old alt. Charging at 14+ . i assume vr is in the alt? Dash V gauge hits 12 with ac ,flips 10 - 14 w blinkers & Engine pulses. Ac and blinkers together gets reaction. Lights ok alone add ac or blinker and not ok. Checked all grounds i can find they're 30 years old but attached.
  6. E

    Lights, fan, signals cause engine to spasm.

    Yeah.. Work was done by professionals. No rework of wiring or connections... That I'm informed of. Blinker fuse was blown when i picked it up. Changed that. I think I'm looking for a ground issue just not sure where to start, under hood or dash.
  7. E

    Lights, fan, signals cause engine to spasm.

    Got a 90 Cheyenne 4x4. 5.7 . Relaced ac complete under hood. So it runs great until you use the signals or turn the fan blower on doesn't matter ac or not . engine bucks like wants to quit. Turn off blinkers or fan and it's normal again..

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