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Thermal Time Switch only affect engine starting. It provides the ground for the cold start valve. It would not affect idle RPM or dwell. If those changed, something else made those changes.

The...

It may just be a valve cover gasket leak.

I have seen some OEM fans drawing 15 amps or a little more. Not seen anyone state their 20 amp fuse has blown.

A great tool to have is a clamp type DC current meter to check your fan currents. ...

Thanks. I will have to try that engine paint.

Will it wipe without any paint on the towel after it gets fuel on it?

I have yet to find any colored paint to be fuel proof. Clear Poly brush paint seems pretty good but the spray cans that claim colored poly seem just as bad as any other paint. "Steel It" paint is a...

The idle ECU does try to hold 775 RPM all the time. It does not know if in park or neutral.

There is a thermistor (changes resistance with temperature) in the Y pipe that provides the measurement...

Fan relay would not kill one fan. If you tested the voltage at the fan connector and get no voltage when the other fan is running then you need to test that you get voltage (with the one fan...

Those jumpers are not installed in the correct pins.

With the OEM ECU the module circuit is powered by the small purple wire. The actuators get powered by the red wire from the beaker.

Photo reminds me that I recently fixed my hood light from falling out all the time. About 10 layers of masking tape on one end of clear lens and now it holds in very nicely. I think a lot of owner...

There are only 2 wires for the door switches. One is grounded when both doors are locked and floats when unlocked. The other wire is grounded when both doors are unlocked and floats when locked. ...

Agree. The GM module gives you better dwell (less power consumed at idle) and current limiting (6 amps max) but still can run OEM unit with about 1.5 ohm coil.

Yes. Don't keep running it like that with a 0.40 ohm primary coil.

The white/yellow goes to the coil. The white wire gets 12 volts with the key on (from AUX relay). So you would connect the white wire to the white/yellow wire and tape off (or remove) all other...

The ignition coils normally need about 6 amps of current when running. The use of a resistor was the normal design so when cranking a cold engine you could get that 6 amps when the battery voltage...

I would think where the sheet does sharp bends it could thin that much.

Look at this thread. Start at Post #85 if you don't want to read the whole thing.

https://dmctalk.org/showthread.php?13649-Ignition-ECU-operation-HEI/page9

Thanks. Stopped in Harbor Freight and they don't have much for 3/4" drive unless you what to buy a full set. I just picked up a 3/4" to 1/2" adapter and a 32 mm 1/2" drive impact socket. You would...

What socket size it the outer drive shaft hub (the one that requires 270 ft/lbs). I need to have that socket and an extension for my 3/4 torque wrench on hand.

Does your car hold the idle at 775 RPM? The idle ECU opens the idle motor at power on so that should provide enough throttle to start without using the gas pedal.

The warm up regulator makes the...

Hard to see in that photo but I think I see uneven spacing which has shown the springs are a problem.

With all those symptoms, my guess is you have leaking deceleration springs. Did you look at springs?

Here is a photo of bad springs.

I used locktite to lock that holding washer in but as long as the correct O-ring is installed it should make a good seal. I also put some grease on the copper pipe which may also help with sealing.

It's best to compare vent temps not using re-circulation (max). With max air you can get very cold running a long time in the shade. With outside air it's a more stable test of how well the system...