Throttle linkage issue

[Austin1985!]

Hi guys, my first post!
Anyway I have a 98 Dodge 12 valve automatic transmission. I am having issues with the throttle linkage. On my scanner the TPS is reading 59% at WOT and about 6.7% at idle. I took the tps sensor off and with a screwdriver I verified the tps is showing 99% at WOT but when I have everything put together it’s at 59%. It’s not hitting the stop. I measured the ball stud to the bracket and it’s right at 5 inches. What do I need to do? Do I need to adjust the linkage rod or?? I’m confused lol. Thank you!!

 

[GAmes]

What condition are the bushings in the linkage? If they are worn the lever will go sideways instead of fore and aft.
Engine/Transmission (1994 - 1998) - ATTN: High milers, Throttle linkage repair | Turbo Diesel Register

 

[Austin1985!]

What condition are the bushings in the linkage? If they are worn the lever will go sideways instead of fore and aft.
Engine/Transmission (1994 - 1998) - ATTN: High milers, Throttle linkage repair | Turbo Diesel Register

Everything seems to be fine as far as I can tell .When I disconnect the rod from the pump bracket and move the rod by hand the TPS will go to 99%. When I put it back together it’s only at 59% and won’t hit the stop so I can’t get WOT. Not sure what the issue is at all lol. Maybe something with the rod itself but it’s looks just fine.

 

[brucejohnson]

Trying simple things first; does the foot pedal go all the way down or is there a floor mat in the way impeding full travel? How about correct position of the cable housing in all brackets?

 

[Austin1985!]

Trying simple things first; does the foot pedal go all the way down or is there a floor mat in the way impeding full travel? How about correct position of the cable housing in all brackets?

Well I was just looking at it more carefully and found out that my “high idle stop screw” is out too far only allowing the TPS to be at 59% at WOT. I just bought the truck so I’m tinkering. Lol. Not sure how to turn the screw in a few turns to get more travel cause it looks like the head of the screw is round from factory. Screw must of backed out after so many years is my only guess.

 

[BigPapa]

Adjustment procedure

 

[BigPapa]

High idle screw should have had a security wire in it. If the wire is gone, the previous owner has been messing with it. I’m sure theres a procedure out there to adjust it, but all the service manual says is not to mess with it.

 

[Austin1985!]

High idle screw should have had a security wire in it. If the wire is gone, the previous owner has been messing with it. I’m sure theres a procedure out there to adjust it, but all the service manual says is not to mess with it.

I appreciate the help! I’ve been studying these pictures and everything is set up correctly. How does one get the TPS to travel more than 59% if you can’t mess with that screw? The screw is what’s stopping it from going further. I do believe the previous owner did something as the security wire isn’t in there. Also I believe the screw has backed out a lot causing this issue. Need to figure out how to turn the the screw so I can at least try and see if that makes a difference. I appreciate ya!

 

[BigPapa]

If I’m not mistaken, the round head is a cover to keep you from tampering with it. Underneath I think there is a slot for a flat-blade screw driver. I have no idea what turning it will do or which way to turn it. Some part of the linkage should contact the other end of the screw, probably at wide open throttle.

 

[Austin1985!]

If I’m not mistaken, the round head is a cover to keep you from tampering with it. Underneath I think there is a slot for a flat-blade screw driver. I have no idea what turning it will do or which way to turn it. Some part of the linkage should contact the other end of the screw, probably at wide open throttle.

Thanks bud! I actually got it out and put another screw in it. Just took some pliers and moved it back and forth and it came right out. I didn’t see a cap on it but i got it out. The old screw got bent somehow. Everything is perfect now. I do appreciate your help!