Setting the Idle

[rick_hake]

I have a 93 Loyale EA-82 that wants to die occaissional at a stop light. If I am running the A/C it will die at every light. I would like to set the idle but the manual doesn't cover anything but R&R the accelerator cable, and I have tried adjusting the cable position with the lock-nut but it doesn't seem to change the idle speed. I don't see any thing that looks like an idle adjustment. I am going to send my Haynes manual to the recyclers where it can be turned into something useful to read.

Rick

[McDave]

There is a screw recessed in the front side of the throttle body just above the idle air control valve (IAC) that is used to adjust base idle speed. But that's not your problem.

 

I would clean the IAC by starting the car and taking the IAC hose off the air horn and spray Berryman's B12 carb cleaner down the hose. You'll have to operate the throttle with your other hand to keep it running.

 

If that didn't fix it then you probably have some carbon built up on the egr valve holding the valve open. Take the valve off and clean all the carbon out with B12. Slip your finger under the top to lift up the diaphram to get to the inside of the valve too.

 

Either one of those should do it. No adjustment required.

[GeneralDisorder]

Yes - there is no idle adjustment on SPFI's. You just need to clean and verify the function of the IAC as mentioned by dave.

 

DO NOT adjust the throttle plate stop screw. It is set at the factory and according to the manual cannot be reset if changed.

 

GD

[rick_hake]

There is a screw recessed in the front side of the throttle body just above the idle air control valve (IAC) that is used to adjust base idle speed. But that's not your problem.

 

I would clean the IAC by starting the car and taking the IAC hose off the air horn and spray Berryman's B12 carb cleaner down the hose. You'll have to operate the throttle with your other hand to keep it running.

 

If that didn't fix it then you probably have some carbon built up on the egr valve holding the valve open. Take the valve off and clean all the carbon out with B12. Slip your finger under the top to lift up the diaphram to get to the inside of the valve too.

 

Either one of those should do it. No adjustment required.

 

Thanks for the information I will pick up the Berryman's B12 carb cleaner tomorrow.

[McDave]

Thanks for the information I will pick up the Berryman's B12 carb cleaner tomorrow.

You're welcome! I just wanted to add a word of caution - be careful where you spray the B12. It's pretty strong stuff. It's great for cleaning and freeing up metal parts and carbs, but it's strong enough to melt plastics and paint.

 

If you need to clean up a throttle bore that is sticking for instance, it's better to spray the B12 on a rag and wipe it out manually rather that spraying the bore down and risk the chance of the stuff finding it's way into the electronics of the iac and tps sensors.

 

It will work fine for cleaning out your IAC throat and egr valve, just don't get too carried away with it in other areas and you'll do more good than harm.