I Can't Win! IDI Throttle Cable - Ford Truck Enthusiasts Forums
 

Go Back   Ford Truck Enthusiasts Forums > Diesel > Pre-Power Stroke Diesel (7.3L IDI & 6.9L)
Log In 


Pre-Power Stroke Diesel (7.3L IDI & 6.9L) Diesel Topics Only

I Can't Win! IDI Throttle Cable

Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 12-07-2015, 05:02 PM
Russell F Cary's Avatar
Russell F Cary Russell F Cary is online now
Senior User
 
Join Date: May 2015
Location: Backwoods of Alaska
Posts: 389
Russell F Cary is gaining momentum as a positive member of FTE.Russell F Cary is gaining momentum as a positive member of FTE.
I Can't Win! IDI Throttle Cable

The throttle cable on my '88 7.3 has been giving me fits ever since I purchased the truck. When I put my foot to the floor, the throttle had a tendency to stick open, and the pedal would only release after I kicked it back with my foot. Being that a new throttle cable was relatively inexpensive, I just replaced it, hoping the problem would be resolved.

No such luck.

It was actually relatively problem free for the last four months or so, and then it started binding again. So I put a heavier spring on the injection pump, thinking that would finally solve it.

It stopped binding, but the pedal became even more obscenely hard to press, to the point that it was almost a workout to do it.

Well, then the plastic bushing that sits at the top of the pedal arm to catch the end of the cable disintegrated. So I had to use some large split shot to take up the slack in the cable.

And then, this morning, a cold morning, the pedal starts sticking again!!

I'm tired of throwing temporary fixes at this thing. I need it fixed, once and for all. It's my understanding that you should be able to work the throttle with a few fingers, just like every other vehicle out there.

I've verified that the injection pump is not the problem. Any ideas?
__________________
"Callie" '88 F-250 4x4, ZF5 behind a 7.3 IDI Turbo
Reply With Quote
  #2  
Old 12-07-2015, 06:21 PM
Pkupman82's Avatar
Pkupman82 Pkupman82 is offline
Postmaster
 
Join Date: Feb 2003
Location: Muskegon, MI (home)
Posts: 3,160
Pkupman82 has a good reputation on FTE.Pkupman82 has a good reputation on FTE.
Did you try unhooking the cable and checking it for proper function? I guess the other thing I would try is to remove the cable assembly from the truck and try spraying some WD40 or a comparable spray lubricant in the end of the sheath. Work it in and out while spraying it periodically. I would think that should take care of it. My guess is the braided cable inside could be fraying and getting snagged up inside the sheathing. I've had this issue with one of my old gassers.
Reply With Quote
  #3  
Old 12-07-2015, 08:35 PM
Russell F Cary's Avatar
Russell F Cary Russell F Cary is online now
Senior User
 
Join Date: May 2015
Location: Backwoods of Alaska
Posts: 389
Russell F Cary is gaining momentum as a positive member of FTE.Russell F Cary is gaining momentum as a positive member of FTE.
No, I have not tried it with the new cable, but I tried it with the cable I replaced and it didn't help. It still functioned smoothly when I removed it from the truck, but I replaced it anyway because I had the new one in my hand.

I suppose there's two separate issues I'm trying to deal with. One is the fact that the pedal sticks to the floor sometimes. The second is that the pedal is ungodly hard to actuate. It should be smooth and easy to work simply with a motion of my ankle. It shouldn't take my entire leg to get the pedal to the floor. Right?
__________________
"Callie" '88 F-250 4x4, ZF5 behind a 7.3 IDI Turbo
Reply With Quote
  #4  
Old 12-07-2015, 09:21 PM
tecgod13 tecgod13 is online now
Postmaster
 
Join Date: Sep 2007
Location: Western Mass
Posts: 2,791
tecgod13 is gaining momentum as a positive member of FTE.tecgod13 is gaining momentum as a positive member of FTE.
Pedal should be easy to operate.
Is it kinked or sharply turned anywhere?
When you unhook the cable, how does the bare pedal feel? It should flop around with basically no effort at all, maybe you need to free up the pedal itself.
__________________
1988 F250, 7.3L IDI, regular cab, long bed, 5spd ZF
Mods: ATS turbo, 3.5 inch exhaust, superduty springs front and rear, 4 gauge A-pillar pod: boost, pyro, coolant and 4th spot is switches; was 2wd, now 4wd with Dana 60 front axle
next projects: fix/complete the 3.5 inch exhaust (tailpipe exits waaaaaay to low, and needs to be extended out from under the bed) swap to a rust free cab
Reply With Quote
  #5  
Old 12-07-2015, 09:25 PM
Russell F Cary's Avatar
Russell F Cary Russell F Cary is online now
Senior User
 
Join Date: May 2015
Location: Backwoods of Alaska
Posts: 389
Russell F Cary is gaining momentum as a positive member of FTE.Russell F Cary is gaining momentum as a positive member of FTE.
The pedal on its own articulates freely. There's no binding in the pedal arm. It does have a few turns in it, simply due to the length. I can see how it would have a more direct path if it were shorter, but it's the same as the one I pulled out of it when I bought it.

Perhaps I should look into shortening it?
__________________
"Callie" '88 F-250 4x4, ZF5 behind a 7.3 IDI Turbo
Reply With Quote
  #6  
Old 12-07-2015, 09:46 PM
FordTruckfan89's Avatar
FordTruckfan89 FordTruckfan89 is offline
Senior User
 
Join Date: May 2013
Location: NC
Posts: 397
FordTruckfan89 is gaining momentum as a positive member of FTE.
dusty.davis.731 Rattlin_89IDI
try hanging it up and soaking it with a grease or cable lubricant. unbolt the pedal assembly from the truck and check the pivot point for unusual wear. Only thing I can think of is when there is pressure from the cable pulling it at the top of the arm, it gets in a bind. Even try unhooking the end of the cable from the pedal assembly and pulling on the end with pliers, see how it moves.
__________________
1989 F250 4x4, 7.3, E4OD,3.5" exhaust, K&N filter, 3G Swap, Headlight relays, 55/100w bulbs, Dayton 43-398 front springs
Admin for the FB NC OBS Ford Owners Group
FTE NC chapter member
Dustin
Reply With Quote
  #7  
Old 12-07-2015, 10:28 PM
Red454sedgwick Red454sedgwick is offline
Posting Guru
 
Join Date: Feb 2013
Posts: 1,153
Red454sedgwick is starting off with a positive reputation.
trf sedgwick
I haven't had any luck my self with after market cables, go to a junk yard and get one, one of a fuel injected small bock will work, also check that you cable hasn't been melted by the turbo
__________________
Clevenger 93 F250 xlt 7.3idit excab 4x4 5 by 3, always gets me where i'm going
Vince 88 F250 xl 7.3idit excab 4x4 E4OD banks 2, likes to leave me far from home
Tow truck 89 custom 7.3na dually c6, wont work somedays
White 95 F150 xl 302, 4x4 5 speed, always gets me home
toyoda 92 corrola auto, parts runner
Reply With Quote
  #8  
Old 12-07-2015, 10:54 PM
Russell F Cary's Avatar
Russell F Cary Russell F Cary is online now
Senior User
 
Join Date: May 2015
Location: Backwoods of Alaska
Posts: 389
Russell F Cary is gaining momentum as a positive member of FTE.Russell F Cary is gaining momentum as a positive member of FTE.
I have verified that the sheath is not being melted by the turbo.

What benefit have you seen in using one off an FI small block, as opposed to the proper part for this engine?

Also, how does your pedal feel? Is it easy to manipulate with your hand?
__________________
"Callie" '88 F-250 4x4, ZF5 behind a 7.3 IDI Turbo
Reply With Quote
  #9  
Old 12-08-2015, 07:25 AM
fhafer's Avatar
fhafer fhafer is offline
Senior User
 
Join Date: Dec 2010
Location: Norfolk, VA
Posts: 141
fhafer is starting off with a positive reputation.
Have you checked the FIPL/TPS on the opposite side of the IP from the throttle assembly? Is it binding...or is the IP shaft rotating freely? Just a thought.


Never mind, you have the five speed.
Reply With Quote
  #10  
Old 12-08-2015, 07:49 AM
tjc transport's Avatar
tjc transport tjc transport is offline
i ain't rite
 
Join Date: Mar 2005
Location: ElephantIsland Antarctica
Posts: 40,004
tjc transport has a superb reputationtjc transport has a superb reputationtjc transport has a superb reputationtjc transport has a superb reputationtjc transport has a superb reputationtjc transport has a superb reputationtjc transport has a superb reputationtjc transport has a superb reputationtjc transport has a superb reputationtjc transport has a superb reputationtjc transport has a superb reputation
there are three or four different length throttle cables. if the one you put on is not the proper length for your engine, you will get binding.
for the diesel the throttle cable should be 42.25 to 42.5 inches long
__________________
Tom
Moderator of the "not wrapped too tight forum"
rarely in life do you meet a person that will drop everything to help a stranger,
and give the shirt off his back to a friend.
Steve Price was that kind of person.
Godspeed "window licker", the short bus will never be the same with you gone.
Reply With Quote
  #11  
Old 12-08-2015, 08:53 PM
Russell F Cary's Avatar
Russell F Cary Russell F Cary is online now
Senior User
 
Join Date: May 2015
Location: Backwoods of Alaska
Posts: 389
Russell F Cary is gaining momentum as a positive member of FTE.Russell F Cary is gaining momentum as a positive member of FTE.
Well, the battle rages on.

One of the pieces of split shot that I crimped on the end of the cable popped off tonight.

I'm not in a position to do much in the way of mechanical work right now, but need my truck operable.

Tom, according to the specs online, the cable currently in the truck is 42.2" long.
__________________
"Callie" '88 F-250 4x4, ZF5 behind a 7.3 IDI Turbo
Reply With Quote
  #12  
Old 12-08-2015, 09:50 PM
Red454sedgwick Red454sedgwick is offline
Posting Guru
 
Join Date: Feb 2013
Posts: 1,153
Red454sedgwick is starting off with a positive reputation.
trf sedgwick
The small bock was what I had and it would be easier to find in a junkyard, it works just fine. It's been in my 88 since may this year
__________________
Clevenger 93 F250 xlt 7.3idit excab 4x4 5 by 3, always gets me where i'm going
Vince 88 F250 xl 7.3idit excab 4x4 E4OD banks 2, likes to leave me far from home
Tow truck 89 custom 7.3na dually c6, wont work somedays
White 95 F150 xl 302, 4x4 5 speed, always gets me home
toyoda 92 corrola auto, parts runner
Reply With Quote
  #13  
Old 12-08-2015, 10:11 PM
Russell F Cary's Avatar
Russell F Cary Russell F Cary is online now
Senior User
 
Join Date: May 2015
Location: Backwoods of Alaska
Posts: 389
Russell F Cary is gaining momentum as a positive member of FTE.Russell F Cary is gaining momentum as a positive member of FTE.
Alright, I'll look into it. What makes the small block throttle cable superior?
__________________
"Callie" '88 F-250 4x4, ZF5 behind a 7.3 IDI Turbo
Reply With Quote
  #14  
Old 12-08-2015, 10:44 PM
The_Josh_Bear The_Josh_Bear is online now
Senior User
 
Join Date: Feb 2008
Location: North Bend
Posts: 452
The_Josh_Bear is starting off with a positive reputation.
Quote:
Originally Posted by Red454sedgwick View Post
I haven't had any luck my self with after market cables, go to a junk yard and get one, one of a fuel injected small bock will work, also check that you cable hasn't been melted by the turbo
Quote:
Originally Posted by Russell F Cary View Post
Alright, I'll look into it. What makes the small block throttle cable superior?
He's saying the AFTERMARKET cables are not the best. The OEM gasser cable isn't superior to the OEM IDI cable, just that it works fine in this application, better than the aftermarket ones.
__________________
'89 F-250 7.3 N/A, 5-speed, 4X4, 4.10's, Crew Cab, Long Bed - 3g Alt, Beru's with manual glow plug mod, soup bowl gone, 4" ram air, proper west coast towing mirrors, LuK flywheel/clutch kit, proper Y-pipe collector to 3.5" exhaust
Quote:
Rick993: My thinking right now is everything I'm installing (axle pivot bushing, leaf spring bushings, etc) just requires parts, a lot of brute violence, and a torque wrench. I'm comfortable with that.
Reply With Quote
  #15  
Old 12-08-2015, 11:42 PM
Ford_Six's Avatar
Ford_Six Ford_Six is offline
Super Moderator
 
Join Date: Oct 2002
Location: The Big, Oregon
Posts: 17,390
Ford_Six has a superb reputationFord_Six has a superb reputationFord_Six has a superb reputationFord_Six has a superb reputationFord_Six has a superb reputationFord_Six has a superb reputationFord_Six has a superb reputationFord_Six has a superb reputationFord_Six has a superb reputationFord_Six has a superb reputationFord_Six has a superb reputation
With the cable off, move the pump lever. It should move quite freely, just like a carb lever. If you have to crank on it to move it, something's wrong.
__________________
Jared
Real trucks have the key on the left
FTE Guidelines
Quote:
Originally Posted by tjc transport
but i can't tell you where i am, i don't want the nice men in the white suits and hug me jackets finding me
Reply With Quote
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Call out to you 5.0 EFI users Jeff and Nicolle 1948 - 1956 F1, F100 & Larger F-Series Trucks 19 01-30-2016 07:34 PM
throttle cable DB9787 Super Duty & Heavy Duty 1 09-29-2015 07:59 AM
Throttle linkage Spparky82 1967 - 1972 F-100 & Larger F-Series Trucks 9 08-18-2015 09:40 AM
Throttle Position Sensor goes bad every 6 months or sooner BigRedWeather 1994.5 - 1997 7.3L Power Stroke Diesel 12 08-03-2015 05:01 PM
Did my injection pump die? bashby Pre-Power Stroke Diesel (7.3L IDI & 6.9L) 12 05-14-2015 03:12 PM


Go Back   Ford Truck Enthusiasts Forums > Diesel > Pre-Power Stroke Diesel (7.3L IDI & 6.9L)

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump



All times are GMT -5. The time now is 11:47 PM.

 

Advertising - Terms of Use - Privacy Statement - Terms of Service - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup