[68c10airstream]

Maybe i can help as a past drive-ability guy. Computer supplies a regulated 5.0 voltage and goes to one terminal, and a ground is supplied to another terminal at the tps. The last remaining terminal is the return terminal going to the computer as a gas pedal position reference (computer needs to "see" the pedal position). Inside the tps this return reference is basically a "feeler wire", rubbing across a grid. The grid has ground at one end and 5.0 volts at the other end. As an example if your gas pedal (tps) was about half way open, the feeler wire would be rubbing across about a 2.50 volt position.

If the computer is not seeing any voltage, you have an intermittent connection, (open circuit) on the reference circuit.

I don't want to confuse you, but for all parties reading this i will continue into a little more in depth troubles.

If the computer is seeing full 5.0 supply voltage, the ground circuit getting to the tps has gone open circuit. Reason being is this; with the ground open circuit, inside the tps the grid that would normally have a voltage drop across it's surface is NOT a voltage drop anymore because it's an open circuit so the grid is 5.0 supply voltage all the way across the surface.

The same is true but opposite if the 5.0 supply voltage goes away because it's an intermittent open circuit. The tps grid is ground all the way across surface.

As a caution these issues can be dangerous!! Think of an intermittent 5.0 supply to the tps; you step on the gas pedal, 5.0 supply voltage goes away and the engine falls on it's face as you pull out in front of an oncoming car, only to get t-boned!!

A little more info is this; usually at idle the computer reference signal will be about 10 percent of supply voltage- .5 voltage (1/2 volt) and with the gas pedal floored (tps at max wide open) will be 90 percent of supply voltage= 4.5 volts. These values are just an approximate.

The tps will always be able to move a little farther than the gas pedal can, that way the computer should never "see 0 volts and 5.0 volts, so normally the reference circiut should always have a voltage present!

To sum up your situation, with no voltage on the reference circuit you have an open circuit at the tps area an/or the 5.0 supply voltage is an open circuit.

We have ls1nova as a great help here, eric is a real asset!!!!