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    HVAC Troubleshooting

    Thanks. My next Diag was going to test the voltage at the solenoid connector, then swap to my other ac control panel. It is a OEM panel but had to replace it due to a bad and melted connector on the fan speed circuit. I had soldered in a new connector and put in a cheap control panel. Thats...
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    HVAC Troubleshooting

    I used a variable voltage power supply and a meter. The new solenoid activated at 6v. This would lead me to believe it would have to be actuated off of the “blend” circuit off off of the control panel inside the vehicle.
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    Ignition distributor upgrade?

    I seem to be going to more distributor caps here lately. The truck will act like you lose fuel pressure, you can put the pedal to the floor and then all of a sudden you just takes off out of nowhere. Idle gets to be super rough and then will clear up out of nowhere I’m 99.9% sure it’s the...
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    HVAC Troubleshooting

    So by the information you’re telling me, the solenoid should have a 12 V and ground signal correct. Ground probably chassis and 12 V when the max button on the AC panel is pressed? I don’t think I have a vacuum leak, I replace the preformed factory hose from the manifold to the solenoid with a...
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    HVAC Troubleshooting

    I have a 99 two-door Tahoe. I recently noticed about a month ago the AC would start blowing hot under heavy acceleration, or a change in vacuum manifold pressure. There is a solenoid on the firewall that runs from the manifold, and then down to the heater control valve that is between the engine...

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