throttle cable pulls TB when hot

[idt512]

I noticed that whenever I drive my car for more than 30 minutes my idle starts to rise, I watch my AFC and when cold the TPS reads perfect at 0, but when warm it starts to rise usually around .5% to 1.5%, but yesterday I drove my car for about an hour and the TPS got as high as 4%, so I pull over and push on the TB to shut and my idle drops back to normal. I now conclude that I my problem was the throttle cable when all along I thought I had either a TPS or ECU issue...So after letting my car cool down I get to work on the assembly that links all 3 cables (pedal, cruise control, and TB). I check for any binding but I dont see any, could the cable be shrinking when it gets hot? Anyone else experience similar issues?

 

[siceclipse]

you're looking in the right direction.
Its probly not the actual fix, but loosen those locking nuts on the cruise control box (black box) just a turn or two.

thats what i did.

 

[scott91370]

I have the same problem on my 96. It just started and really only happens when the temp of the coolant gets over 210*. I'm hoping after the cooling issue is solved it will not happen anymore.

Check your coolant temps with a datalogger and see if they are getting over 210.

 

[idt512]

I have the same problem on my 96. It just started and really only happens when the temp of the coolant gets over 210*. I'm hoping after the cooling issue is solved it will not happen anymore.

Check your coolant temps with a datalogger and see if they are getting over 210.

Whether or not the temp gets over 210, the solution has to be at the cable since it is the one pulling on the TB when it gets hot. And its also normal for these cars to get well over 210.