xylene
Posts: 3
Joined: 2/11/2008
Status: offline
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While many things can cause similar symptoms...
Check for a vacuum leak as a good jumping off point.
Almost any car will exhibit the 'bouncy idle' you are describing if it has a vacuum leak.
Plus you car is just about the right age for the vacuum hoses to have begun to oxidize and decay.
The way I have gone about this is to disconnect the vacuum hose from the manifold (eliminating all vacuum to see the state of operation, then work my way up the system
Vacuum hose is pretty cheap. Anything even a little suspect (dry crack) I replace. Use some rubber preseravitve to lube the joints. Avoid the petroleum based lubes. Tubing that is in OK shape I coat with rubber preservative. It iws a good idea to clean and protect all the underhood rubber in your car anyway.
If it fixes the problem, great. Otherwise you might need some more diagniostic work. A diagnostic tool is a good idea, or employ a mechanics talent.
Invest in the full technical manual for your car. It will run new about 100 bucks (maybe a little more) but will be well worth it. Shop for used one online to save some dough, but don't count on getting lucky.
My opinion - Always run good high octane gas in your older golf too. Use a gas line dewaterer (iso-alcohol) every 4th tank in humid weather. Use a fuel injector cleaner as needed, but at least every 3 months.
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HELP HELP HELP (Self reving Engine) - 
