Club 80-90 Forums

Hi, apparently there is a section in the bentley manual to set the throttle stop on the 2.1 inj, i have a haynes manual which doesn´t mention this, so can anyone tell me what the bentley manual says. I know it´s preset but i think mine has been messed with before, any help is much appreciated....merry xmas

bruce wrote:Hi, apparently there is a section in the bentley manual to set the throttle stop on the 2.1 inj

I found the Bentley specs weren't that much help, probably because of wear in my ~160k mile throttle body...

There's really only a few things you need to pay attention to. Find the multiplug around the RHR intake runner. Take that apart, and with a multimeter check the throttle position switch (the end of the cable that disappears towards the throttle body, under the manifold). It should reliably go closed when the throttle's fully closed and fully open, and be open circuit in between. Check with the engine running and the engine stopped. Check with the throttle closing gently and snapping shut. It should ALWAYS switch when the throttle closes and opens.

Adjust it so that it does, using the throttle cable adjustment and the throttle stop. You want there to be a tiny bit of play in the cable, then the cable going tight a snidge before the lever comes off the stop.

If the TPS doesn't switch, the idle control circuitry won't do anything.

Thanks for that but my micro switch is working ok as i said in the post the stop has been messed with & i need to set the butter fly

AdrianC wrote:

bruce wrote:Hi, apparently there is a section in the bentley manual to set the throttle stop on the 2.1 inj

I found the Bentley specs weren't that much help, probably because of wear in my ~160k mile throttle body...

There's really only a few things you need to pay attention to. Find the multiplug around the RHR intake runner. Take that apart, and with a multimeter check the throttle position switch (the end of the cable that disappears towards the throttle body, under the manifold). It should reliably go closed when the throttle's fully closed and fully open, and be open circuit in between. Check with the engine running and the engine stopped. Check with the throttle closing gently and snapping shut. It should ALWAYS switch when the throttle closes and opens.

Adjust it so that it does, using the throttle cable adjustment and the throttle stop. You want there to be a tiny bit of play in the cable, then the cable going tight a snidge before the lever comes off the stop.

If the TPS doesn't switch, the idle control circuitry won't do anything.