R32 idle speed adjustment

[B0oStEr]

My R32 used to idle way too fast (1500-1700 rpm) for 10 or so seconds after I pulled up at the lights or what ever, before it dropped to 800rpm.

My mechanic adjusted the idle control device at the rear of the inlet manifold by disconnecting the plug then screwing the adjustment in until it was right then he reconnected the plug. Apparently it was way out.

It's been much better since he did this.

My sons recently purchased R32 has a similar fast idle problem and I said to myself "I know this one" and pulled the plug off the controller and tried to screw in the adjustment. The only problem is that it's already screwed in all the way (1200 rpm idle) and screwing it out only increases the idle so there must be another problem.

Does anyone have any ideas what it could be or how i should adjust the idle properly?

[Slide]

does the air conditioning compressor kick in when this happens?

[blind_elk]

The valve probably needs a clean. They get gummed up with carbon. It's simple enough to remove, disassemble and clean.

[dangerous_daveo]

Just use carby cleaner to clean it???

[Godzilla32]

I have the same problem but its not my AAC vavle it can be an intake leak. Around the plenum or throttles, use sum aerostart . Spray it around the intake and throttles. if the engine picks up revs then you got a leak there

[BHDave]

There is a bit of adjustment on the throttle body closed position, check that it hasn't been messed with maybe?

[Alex Au]

take the valve out & clean it. it could be the internal spring won't get back & close the hole.