And we are STILL having problems imagine that!!!!Thanks so much

 

According to that this sensor won't fit my truck and yet according to the pic the one on the right of the 2 is exactly what I need. Been looking for 2 weeks on the net and nothing...Thanks again T

 

You're more than welcome, my friend. Hope you get it all sorted out soon.

 

Just ordered one tonight for the 2000!

 

I too needed the one on the right for my 2000 (198K miles), so I purchased a genuine Motorcraft Part No. FS4Z-9B989-AA (DY-967) from eBay and when it arrived it looked like the one on the left and was not compatible with my pedal assembly. This lead me to my local NAPA...They had exactly what I (thought) I needed in Part No. 610-1089.

My original issue reared it's head up while driving to work a couple of weeks ago. Driving 40 mph the truck unexpectedly dropped to an idle (SES light was illuminated)...I tapped the accelerator a couple of times and all seemed fine for a couple of days. Then while leaving work I start the truck, put it in gear and get nothing but an idle when depressing the accelerator...again, I tapped the accelerator a few times and all seemed good except for the SES light still be illuminated.

I started searching this site after the initial incident and was pretty sure it was TPS related. I tried cleaning the original TPS, put it back together and no change...still a dead spot. So I swapped the original TPS with the new NAPA part and still no change. So, back to searching this site I go...I found a thread where a member had a similar result. They rapidly pushed the accelerator to the floor five or six times and they claim that the problem went away (Perhaps an IVS issue?). I did the same and the truck ran fine for a week, but still with an illuminated SES light.

Today, I drove nearly 100 miles and the problem reared it's head again. In an effort to make it home, I disconnected both batteries momentarily and was able to make it home without incident and the SES light was no longer illuminated. Once home, I tried starting and stopping the truck and the SES once again remained illuminated.

I'm hoping to get the codes read tomorrow, but wanted to do some phishing here in the interim. Thank you!

 

Please Let us know what you find out Thanks Terry

 

Next time try manually putting it in second and then back to drive. If that works you might have a neutral safety switch problem. Before mine would be driving along and suddenly act like it was in neutral. The switch fixed it Terry

 

Thanks for keeping this thread alive. Bookmarked the part and I am sure I am going to need one in the future.

 

Thank you Terry...

I took my truck to Pep Boys this morning and they checked for codes because the SES light is still on. The only code they could find was P0678 "Cylinder 8 Glow Plug Circuit". They used a Matco Tools MD60 Code Advisor. I'm pretty sure I had a similar code some years ago for cylinder 6 and it ended up being the glow plug relay.

It would seem on face that my current issue is not glow plug related, but I'm a rookie and somebody here usually always puts me on the right track once I bring the details to light and more info is gathered.

Thank you in advance for anything additional you or others may add.

Gary

 

So, I removed my pedal assembly again and wanted to take a good look at the Idle Validation Switch (IVS) and check continuity. I brought it in to work and explained to my electronic guru co-workers what the issue was. Nobody could find a thing wrong with the IVS so back together it went. I also looked over some of the connectors I've read about on this site and didn't find a smoking gun, but did do a thick wrap of tape around the loom that rubs against the driver's side valve cover.


I continued to drive the truck this last week without any issues until this mornings trip to work. I didn't mention this in my original post, but I'm now pretty sure I was on a grade and had switched the truck out of overdrive shortly before I lost the accelerator on the 100 mile trip I spoke of in my first post.


I have been going crazy trying to duplicate whatever it was that is causing this issue. This morning I was switching the overdrive off and on several times and I lost the accelerator again! I actually got it to do it twice and both times I heeded the advice of MTNMX and tried manually downshifting into 2nd gear. The first time doing this it made no difference...still no accelerator, but the second time the accelerator came back. The whole while I was pumping the accelerator in hopes of it working again.


I would like to think that I'm narrowing in on the root cause Today, when I get home from work I will pull the covers off of the column and check the overdrive wiring and switch. It's not blowing Fuse #19, but it does seems ironic that all of these pieces in question (TPS, IVS and O/D Switch) are on the same circuit. After reading several threads here, perhaps there is a broken wire inside the shrink wrap tubing or the switch has an intermittent problem that's causing everything on that circuit to lose it's mojo. Hopefully it's not PCM related...


Thank you again for taking a look and offering solutions...


Gary

 

I wanted to follow up with my findings over the last three months. I removed the column cover and everything looked great. I went back to searching the web for anything I could find related to this subject and stumbled across a YouTube video of a guy that had an earlier truck with a 7.3 PSD that was experiencing the same problem and he said that his TPS appeared to be functioning correctly when checked with a meter, but it was bad. He swapped the pedal assembly and his problem went away.


I purchased a new Ford pedal assembly off the internet for $236 installed it and voila, my problem also went away. I've put over a thousand miles on the truck since the swap without so much as even a similar symptom. I've used the OD switch extensively and it hasn't triggered anything odd as I had previously suspected.


Thank you all for your help!


Gary

 

Gary, do you mind posting a picture of the pedal assembly you purchased? Also, the YouTube link you found, please!

Stewart

 

Gary,

Thanks for "closing the loop" on this one.

Not everybody does.

Pop

 

Note: I didn't have any dash light issues like the person in the video...only the no throttle response for me. If you read my previous posts, you'll see that I did swap out my original TPS for a new NAPA unit and the problem persisted. I'm of the opinion that the IVS was the culprit and that can only be changed by installing a new pedal assembly.





The red and yellow wires in the photo above go to the Idle Validation Switch (IVS).



I know I've been a past offender Pop...I'll try harder to not leave the membership hanging.

Gary

 

Sorry, Gary, I never meant to imply that YOU were EVER "an offender", but after re-reading my post, I see one could take it that way.

Again, sorry for the poorly-worded postl

Pop