Interesting..... Leave the P/S jumper in place for now since it cleared the 52 code, hopefully it's not a one off.

TPS signal (green wire) is too high. I'm also concerned about the Ref, Voltage as well, seems high, which will effect the TPS signal voltage.
Got to think about this.

You had an old Continues code of "51c" - (ECT – Voltage to high), the ECT uses the same Ref. Voltage.
2 of those ECA Capacitors are in the 5v Ref. Circuit.

Also concerned about your KOER not running the course.
Check All your codes again after your drive.

 

One thing to try, barely loosen the screws to the TPS, keep your meter attached, lift up carefully the TP Sensor, see if the voltage lowers.

 

Just took it for a drive.

Not normal. It sounds like 1 cylinder is not firing, but it may also have something to do with non-normal accelerator pedal feel.

I just checked the cable... It's connected, but the braided steel that wraps around the cable, is shredded. It shouldn't change the idle, because it appears to be in the same place when I unplug the cable.

The battery is dead now, so I put a charger on it and am ordering a cable now. ( I say ordering, because our local parts houses don't seem to stock much for this truck. They all say its too old).

 

Sorry, your messages came in after I posted.

 

Oh yeah, one thing to check is that that cable is not keeping the TB Valve from returning to the screw stop.

 

So, is your battery old, or your system is not charging.

Things don't work well with bad batteries.... aargh.....

 

After drive codes

KOEO
O - 67
C - 33

I had my wife and daughter help me to get readings while I jiggled plug. It didn't make any difference.

Something to consider...

The 87 TPS is different than the 88 - 92 that the throttle body came from. 87 seems to be a lone year for that tps. The holes for the mounting screws are smaller on the 87. I had to drill them out a little to get the screws to go through.

I have the plug that came one the 92 throttle body. It has three wires going to it, just as the 87. They're colored coded as follows:

grey with orange stripe
black with white stripe
grey with white stripe.

You know where I'm going...

I have the plug that goes with it out of the harness. (I could solder it up and give it a try).

 

The cable didn't look like it would. I disconnected it anyway to remove any possibility.

They'll have it in tomorrow.

I will be out for a couple hours. Wife needs me to do something.

 

battery is less than a year old. I left the ignition on overnight.

It's charging now.

 

You charging system should have easily charged your battery up on that 10 mile run.....

"33c" - Check/Clean the connectors to the EVP Sensor on the EGR Valve. Give the EGR Valve a few hard taps with the hammer. Check the vacuum line to the EGR Valve. Nothing to worry about right now.

"67o" Expected this one to come back, but let's come back to this. (make sure your air-conditioner is turned off when testing)

When you get the chance, photo your old TPS & this other connector you are speaking of, get a shot of the TPS connector as well.

Ahhh, since you know how to drill, go at it again, or use a small round file to make a slot on each side of the screws slots, this will make it adjustable. (adjust to 0.97v or less, green wire)) (if the screws are long enough, add a flat-washer). Kind of curved slotted, Example;





No need to apologize for living the rest of your life, just got back to the house myself.......

 

"I had my wife and daughter help me to get readings while I jiggled plug. It didn't make any difference."

Sorry, I don't understand what you were trying to do here, was it the "Wiggle" test?

 

From your previous post; (“The 87 Throttle position sensor is different than the 88--> up, but can fit... snugly.”)
Maybe, would need to compare the parts.

grey with orange stripe – (Probably a Red stripe)

The color code for the TPS did not change until 1991, so you have an = or > 91 TB.

I don’t know when the connector style changed.
(Did you capture any numbers off your TB before you installed)

Do you have the Part Number for the new TPS – Box, Receipt, etc.
Line your 2 old TPSs up and photograph both sides when you get the chance.

No need to change the plug, same signal paths, but my concern is the proper fit and operation of the sensor.
You will want to be sure the sensor is not binding or causing the TB not to close all the way against the throttle stop screw.

Let us know ahead of time if you something like this happens again, the more we know, the better we can help you.
You are our eyes (if you have 2), ears & fingers on the front line.

So, make some slots in the TPS. (If the holes you drilled are big enough, you might get some adjustment out of it, you won’t need to modify a lot)
Measure both wires at Throttle Closed & WOT.
Then see if you can adjust the Signal wire (green) voltage to 0.97v or less.
(exercise the accelerator, then remeasure)
(readjust if necessary)

If successful, take final measurements and post.

 

what format do you insert pics as? I've tried to cut and paste, jpgs, tiffs, & pdf's. None insert the pic; just the name of the pic.

I have the throttle cable. Installing it and catching up on what you've instructed.

 

I didn't get ten miles in. Throttle cable prevented that.

 

I'm no expert, but I usually upload jpg/jpeg photo's. Don't think you can cut or copy and paste. Use the icon in the menu, (insert image) square with the mountain scene in it.