How do you fix an idle screw that backs out when running?

568 Views 13 Replies 12 Participants Last post by Mk1Racer, Nov 30, 2001

84RabbitMan

Discussion Starter · Nov 28, 2001

I have to tape the screw to stop it from turning. Is there a o-ring or something that could be worn out? I think I need injector seals too. I can hear a loud sucking noise from around the 5th injector and that general area. I was going to order the o-rings and little plastic pieces and see if that helps. My vacuum hoses are all shot as well. How many feet of hose would I need to replace every worn out piece on the car(including the heating/cooling/vents inside)? I heard 6 ft. from someone, but I don't know if that's for all of the hoses or not. I've been slowly fixing this car over the last year. I keep finding more and more things wrong with it though. If only money grew on trees.

It's still a blast to drive. Thanks!

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HyKlas

· #2 · Nov 28, 2001

Re: How do you fix an idle screw that backs out when running? (84RabbitMan)

Yes, there is an o-ring in the TB. Easily replaced at any hardware store. Take the old one with you and get the same size. Not sure about vacuum lines though.

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mk1g60

· #3 · Nov 28, 2001

Re: How do you fix an idle screw that backs out when running? (84RabbitMan)

Get that white sealing tape and rap the screw with it. I dont remember what it is called, but it is very thin and should make it stop coming out. You can get it at any hardware store.

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Coolwhite Fox

· #4 · Nov 28, 2001

Re: How do you fix an idle screw that backs out when running? (mk1g60)

quote:[HR][/HR]Get that white sealing tape and rap the screw with it. I dont remember what it is called, but it is very thin and should make it stop coming out. You can get it at any hardware store.[HR][/HR]

Yeah, that teflon sealing tape. Good stuff. http://****************.com/smile/emthup.gif

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theuean

· #5 · Nov 28, 2001

Re: How do you fix an idle screw that backs out when running? (Coolwhite Fox)

Go to a junkyard with a wrench and take one from a throttle body with a good looking O ring. I got mine brand new from a VW parts wrecker brand new.

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white rabbit

· #6 · Nov 29, 2001

Re: How do you fix an idle screw that backs out when running? (Speedemon)

I actally drilled a hole thru the head of my idle screw and safety wired it to another bolt to keep if from spinning.
A week later I bought a new idle screw from the dealer, it came with the o-ring, about $10 usd.

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Mk1Racer

· #7 · Nov 29, 2001

Re: How do you fix an idle screw that backs out when running? (white rabbit)

quote:[HR][/HR]I bought a new idle screw from the dealer, it came with the o-ring, about $10 usd.
[HR][/HR]

Did you at least get grease w/ it????

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cheiden

· #8 · Nov 29, 2001

Re: How do you fix an idle screw that backs out when running? (millerwj)

I have a funny story about this. My idle screw was giving me all kinds of grief while I was Ice racing last year. I'd finish a lap and the car would be idleing at 1700rpm. I couldn't get it to stay in. One of the senior members of the group said "I have an idea". He went over to is tow vehicle, opened the door, and took a tiny bit of the weather stripping glue off and said "try this". I put a little of the sticky stuff on the screw, put it back in, and the car ran great the rest of the day. Grassroots Motorsports at its finest! http://****************.com/smile/emthup.gif I don't think I've ever fixed that screw the "right" way since then.

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eurotrashrabbit

· #9 · Nov 29, 2001

Re: How do you fix an idle screw that backs out when running? (cheiden)

teflon tape

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sirhc

· #10 · Nov 29, 2001

Re: How do you fix an idle screw that backs out when running? (eurotrashrabbit)

Only thing that sucks is that you can't adjust it by hand after you replace the o-ring.

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tomacGTi

· #11 · Nov 29, 2001

Re: How do you fix an idle screw that backs out when running? (84RabbitMan)

I ran some loctite blue down a pin into the area where the screw threads.
Waited a couple of minutes and presto, no more auto adjusting idle.
-Randy

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84RabbitMan

Discussion Starter · #12 · Nov 30, 2001

Re: How do you fix an idle screw that backs out when running? (84RabbitMan)

Thanks for the help! How about the vacuum lines? Anyone?

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WackyWabbitRacer

· #13 · Nov 30, 2001

Re: How do you fix an idle screw that backs out when running? (84RabbitMan)

Definitely use the O-Ring on the bypass idle adjuster. In racing due to vibration, I put a large vacuum cap plug over the adjuster housing, and if the screw backs out, then the vacuum plug retains it....better than looking for another adjuster. Regards, WWR.

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Mk1Racer

· #14 · Nov 30, 2001

Re: How do you fix an idle screw that backs out when running? (WackyWabbitRacer)

Cool idea w/ the cap Ryan! http://****************.com/smile/emthup.gif http://****************.com/smile/emthup.gif
I use a little safety wire on mine.

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