I'm not sure how correct the settings are on my IAC, TPS, and TV cables are, so I'm going to go ahead and adjust them. I've read articles on how to, and the TV cable is pretty simple, and checking/adjusting the TPS seems fairly simple (anyone know where I can get a digital voltmeter?), but can someone elaborate a little more on how to adjust the IAC? I may not even need to since my car idles where it should, but I just want everything to be in tune. I've also noticed that if I stick my foot down to WOT going about 35mph or so, that it only downshifts to 3rd and not 2nd, I'm hoping that by adjusting my TV cable, it can fix this. All help is appreciated.

 

Vader:

Idle Air Control Cleaning

You can remove the IAC and service it. Remove the electrical connector from the IAC. Unscrew the IAC unit from the throttle body.

You can gently rock the pintle back and forth and allow the spring to extend it until it comes apart in your hands. Clean everything with lint-free cloths and a mild solvent. Harsh solvents can affect the insulation of the stepper motor coils. It's generally the dirt and buildup on this worm shaft that causes sluggish IAC operation.

When the worm gear on the pintle shaft is clean and dry, apply one drop of clean light oil to the shaft and work the pintle back into the rack gears of the motor by the same rocking motion. It takes a while to get the pintle back into the worm gears, but you'll get it. It is important to get the pintle fully retracted into the housing so that the pintle is not forced against the gears when reinstalling the IAC unit in the throttle body.

While the IAC is out, clean the air passages in the throttle body. The orifice in the TB where the IAC resides is the seat that the IAC valve closes against, and it can accumulate a lot of carbon, dirt, and debris. The easy way to do this is with carburetor cleaner and a small stiff brush.

When everything is clean and dry, replace the gasket if it is damaged, apply a little anti-seize to the threads, and torque the IAC to the proper specs. (13 ft/lb for '85-'89 , 30 in/lb for 1990-on.) Proceed with setting the TPS and minimum air position.

 

at 35 mph, you shouldn't even be in fourth(od). if you are, then your motor must be lugging big time. at 35 mph you are most likely already in 3rd and downshifting to 2nd when you go wot.

 

I can physically feel that im in OD, step on it and it only grabs one gear, hopefully once I adjust the kickdown/tv cable, that should solve it.

 

does the car try to stall when it goes into od at 35 mph? i have a 3.27 rear gear. in od at 60 mph i am turning 2000rpm. i think what you are feeling is the torque convertor locking up. in drive at 2000rpm i am only doing 40mph. see where i am going with this.