@@TurboWorld thank you for the quick response. In your case of a bad IACV , it was just a high idle, not a surging idle correct? Tackling this issue rn
does this year have TPS sensor? we cleaned out the IAC valve on 94 supra that seem to be causing the engine to surge, however the idle sits a bit high at idle around 1200rpm.. The TPS sensor seems to have space to adjust at the screws, clockwise or counterclockwise to maybe set the rpm rage at more appropriate idle, around 700- 800 rpm
Don't press it in with a vice that's not how they work it slides up and down on a screw internally if you press it with a vice it will snap the plastic retainer you need to spin the motor shaft til it frees up
Same problem with my supra I cleaned it good it still high I replaced it with another one and also cleaned that one still high so now I think i might have a vaccum leak
Yeah , good possibility of it having a vacuum leak. Spray a bottle of windex all around the gasket areas of in take and throttle body, while running to listen for changes in sound of idle. Should help you find your leak pretty quickly jvst20051 .
I think i am having the same problem because it idles high and my tachometer shows my rpm lowers slowly. I took off the iscv but it isnt seized like yours. I did the resistance and ohms test and i have some questions. When i first took off the iscv it read 21 ohms. When i put it everything back together it read 23 ohms. Then i put it back in the car and it started up to 1400 rpms then it idled at 2000 rpms. What ohm should it read?
Why were you covering the vacuum leak with your finger in the start? To show that the idle air control valve was the problem?
To show the difference it makes with a touch of a vacuum leak at idle. A little Leak makes a big difference
@@TurboWorld thank you for the quick response. In your case of a bad IACV , it was just a high idle, not a surging idle correct? Tackling this issue rn
@@bagginn Np, I have had both, and a hard start as well. Smoke test helps a ton.
does this year have TPS sensor? we cleaned out the IAC valve on 94 supra that seem to be causing the engine to surge, however the idle sits a bit high at idle around 1200rpm.. The TPS sensor seems to have space to adjust at the screws, clockwise or counterclockwise to maybe set the rpm rage at more appropriate idle, around 700- 800 rpm
Yes it does, You may have to set that too.
You might have just solved the problem on my 86 supra
I turn on my Supra and it revs up all the way without stopping could this be the same?
Yes
Don't press it in with a vice that's not how they work it slides up and down on a screw internally if you press it with a vice it will snap the plastic retainer you need to spin the motor shaft til it frees up
Same problem with my supra I cleaned it good it still high I replaced it with another one and also cleaned that one still high so now I think i might have a vaccum leak
Yeah , good possibility of it having a vacuum leak. Spray a bottle of windex all around the gasket areas of in take and throttle body, while running to listen for changes in sound of idle. Should help you find your leak pretty quickly jvst20051 .
Where did you get a new one at
Used actually, Ebay.
I think i am having the same problem because it idles high and my tachometer shows my rpm lowers slowly. I took off the iscv but it isnt seized like yours. I did the resistance and ohms test and i have some questions. When i first took off the iscv it read 21 ohms. When i put it everything back together it read 23 ohms. Then i put it back in the car and it started up to 1400 rpms then it idled at 2000 rpms. What ohm should it read?
Hmm. I don't remember the exact number, but supraforums should have the info.
did you need to drain the coolant
Only a little to get coolant out of throttle body.