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What cause an engine to idle high?
A vacuum leak could cause that.
Can a vacuum leak at the manifold cause the check engine light to come on?
Yes
What could cause engine to idle irregular?
A vacuum leak is one possibility.
What happens when a vacuum line is broke on a PCV valve on a 305?
The vacuum leak will cause the engine to run lean.
Will a vacuum leak cause the check engine light to come on?
It could.It could.
Would bad pistons cause the engine to shake?
Most definitely. Any miss will cause the engine to shake. A vacuum leak will also cause this.
Will a vacuum leak always make your engine run rough?
No, on a fuel injected engine it can cause high idle speed.
What are the symptoms of a bad EGR valve in a 2000 Saturn SL?
A bad EGR valve in a 2000 Saturn can have several symptoms. The EGR valve can cause misfires, the valve can cause vacuum leak style problems. There could also be an engine knock.
Can a vacuum leak be the only problem if the transmission is idling too high?
Well, a transmission itself does not idle...the engine does. A vacuum leak in the engine will cause faster idling or slower idling depending on where the leak is. Newer transmissions do not use vacuum at all for their operation. Older vehicles used vacuum to help with the shifting of gears-automatic transmissions.
Can a dicconnected vacuum tubes cause the engine to run badly?
yes they were put on there for a reason ,,a vacuum leak will make a car run terrible.
Where do you spray to find a vacuum leak?
To find a vacuum leak. the vacuum hoses should be sprayed while the engine is running. A solution of dish soap and water sprayed on a leaky vacuum hose will cause it to blow soap bubbles. Spraying both the hose and the connectors should find the vacuum leak quickly.
What would cause 2003 TB to vibrate while in park or stopped with brakes on?
Possibly a broken motor mount. If it runs good otherwise one cause can be a vacuum leak. The check engine light should be on if it is a vacuum leak.
