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Mind of its own

Tiny
SARAH21
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  • VOLKSWAGEN
?

Mk2 gti 16v, has recently got a mind of its own and is over revving, and do not have a clue why this it just started about a week ago, once she has started up revv's to just over 1000 and goes up to 4000 and back down repetedly? Can any one help?
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Monday, December 18th, 2006 AT 9:10 AM

3 Replies

Tiny
LOSONE
  • MECHANIC
  • 1,616 POSTS
I need the model year to determine what type of fuel injection you have. Let me know. Losone
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Monday, December 18th, 2006 AT 9:32 AM
Tiny
SARAH21
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Yes it a H reg 1990-1991.
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Monday, December 18th, 2006 AT 9:46 AM
Tiny
LOSONE
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The most probable cause of your idle problems is a vacuum leak in the rubber plenum that goes from the air cleaner to the fuel control head. Any vacuum leak will cause a problem. It could be you power barke booster.

Check your engine RPM and pump your brakes if the RPM varies more than 100 rpm it is the brake booster.

One umlikely cause would be trash in the area below the fuel head. There is a round flat plate that often gets trash if the mechanic isn't careful when he changes the air filter.

Good luck but it sounds like a VW mechanic should look at it.

Let me know losone
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Monday, December 18th, 2006 AT 12:57 PM

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