Strange MPS issue, Lew's car Options

[914itis]

I am helping Brian with Lew's car. As most of you may know, it is a 2056 with djet.
The car was running fine, he drive it to CT one day and when he came back he noticed that the MPS was hanging. The car starts to run on 3 cylinders with #4 not firing. We checked for spark and injectors they are all fine, but if you remove spark wire #4, it had no effect.

The strange thing is if you elevate the mps about 6 inches up, it's all fine, even that 4th cyl works. All the electrical wires on the unit are fine

(IMG:style_emoticons/default/confused24.gif) ?

Dies the 2056 uses 1.7 or 2.0 MPS?

He would like to make it to Hershey.

[914_teener]

I have always thought the two MPS bodies of the 1.7 and 2.0 liter are the same.....the only difference was in the calibration and adjustment of the diaphragm? (IMG:style_emoticons/default/WTF.gif)

That looks like a Fuel Injection Corp rebuilt MPS.

My bet is that the MPS came off the mounting bracket and cracked one of the harness wires.

I would check those first.

[914itis]

I have always thought the two MPS bodies of the 1.7 and 2.0 liter are the same.....the only difference was in the calibration and adjustment of the diaphragm? (IMG:style_emoticons/default/WTF.gif)

That looks like a Fuel Injection Corp rebuilt MPS.

My bet is that the MPS came off the mounting bracket and cracked one of the harness wires.

I would check those first.

Harness was checked and is intact.

[r_towle]

I have always thought the two MPS bodies of the 1.7 and 2.0 liter are the same.....the only difference was in the calibration and adjustment of the diaphragm? (IMG:style_emoticons/default/WTF.gif)

That looks like a Fuel Injection Corp rebuilt MPS.

My bet is that the MPS came off the mounting bracket and cracked one of the harness wires.

I would check those first.

Harness was checked and is intact.

in the end, it was not intact.

Rich

[achman_73_2.0]

I have always thought the two MPS bodies of the 1.7 and 2.0 liter are the same.....the only difference was in the calibration and adjustment of the diaphragm? (IMG:style_emoticons/default/WTF.gif)

That looks like a Fuel Injection Corp rebuilt MPS.

My bet is that the MPS came off the mounting bracket and cracked one of the harness wires.

I would check those first.

Harness was checked and is intact.

in the end, it was not intact.

Rich

We pulled the FI on the #4 cylinder, and unplugged the coil and tested it by cranking. The FI squirted fuel, so it appeared that the harness was intact.

It was partially intact, as I found out.

I am going to make a better repair on the wire, then try to set the timing, then maybe even attempt to adjust the valves, as I don't know when they were done last. Definitely might have to have some help on the last one.

After doing timing and valves, I will re-evaluate the pinging. If it is still there, I will look into calibrating the 037.

Thanks for everyone's help

(IMG:style_emoticons/default/driving.gif)