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Model specific boards => Golf mk3 => Topic started by: don-tucker on 05 February 2008, 12:14

Title: Dodgy throttle again
Post by: don-tucker on 05 February 2008, 12:14

I'm back,still with the same symptoms ,being the revs slow down very slowly and even remain some times if held at about 1500 rpm ,seems ok at higher revs,up to now I have removed the throttle body and cleaned,taking off the plastic cover at the back and all seems fine,replaced vacume pipes and hoses,cleaned the AMS.
It is a 2ltr 8 valve Mk3 has anyone got any ideas please?
Don

Title: Re: Dodgy throttle again
Post by: Horney on 05 February 2008, 12:28

DO these have an ISV? If so it could well be that bad boy!

Nick

Title: Re: Dodgy throttle again
Post by: Pete Taylor on 05 February 2008, 12:37

I don't believe they have an ISV. When it stalls, does it start up again straight away? Fuel pump relay will be the next replacement

Title: Re: Dodgy throttle again
Post by: don-tucker on 05 February 2008, 12:42

No they haven't got an ISV,I don't know about the fuel pump relay as it does not stall .
Don

Title: Re: Dodgy throttle again
Post by: Pete Taylor on 05 February 2008, 12:52

Did you clean out the breather hoses whilst you were there?

Title: Re: Dodgy throttle again
Post by: don-tucker on 05 February 2008, 12:57

Yep Pete,they are new.When I try to reset the TB by switching on the ignition for a few mins.I dont hear any clicking or anything else,should I?
Don

Title: Re: Dodgy throttle again
Post by: Pete Taylor on 05 February 2008, 13:03

Did you check the idle switch?

Title: Re: Dodgy throttle again
Post by: don-tucker on 05 February 2008, 14:01

Where is the idle switch? Pete if it,s the small contacts like a relay in the black plastic cover then ,yes i did.
Don

Title: Re: Dodgy throttle again
Post by: Pete Taylor on 05 February 2008, 19:31

Nope, it's a tiny switch on the throttle body that the accelerator cable mechanism stops on. So when you're off the gas it presses the switch in to tell the engine to idle. pull the accelerator open at the throttle body and give the switch a good spray with wd40 and a clean up. Snap the cable stop back on it a few times to make sure it's loose and clicks when pressed

Title: Re: Dodgy throttle again
Post by: don-tucker on 06 February 2008, 08:04

This car hasn't got an idle switch,I wish it had,it would be something else to try.
Don

Title: Re: Dodgy throttle again
Post by: Rmachines on 06 February 2008, 08:38

i had somthing very similar when i took my TB off to clean it on my 1.4L MPI, The revs would take along time to drop to idle, and even then it would tick over arround 1500-2000 and eventualy drop to 1000 if i left it running.   I never figured out what it was but i ran the engine and pulled the vacuum hose off that runs the brake servo, the engine tryed to stall so i poped it back on and it was fine ever since!?

Worth a try! it worked for me  :wink: :smiley:

Title: Re: Dodgy throttle again
Post by: don-tucker on 06 February 2008, 08:45

Anything is worth a try,