Question about 1997 Subaru Legacy
I have a 1997 Subaru Legacy, 2.5L Sport Utility Sedan AWD. The car starts fine, and engine runs stable, but it vibrates unusually, a bit too much than a normal running engine would. when pressing gas pedal, it stops vibrating, only when idle. I was told to replace spark plugs and the wiring set for the plugs, I did, but the problem still remains. Can anyone tell me what to do next?
I'd suspect a vacuum leak in the inlet manifold, check to see if any vacuum lines might have fallen off. This can cause a lean misfire at idle, but often it's not enough of a leak to make it lean enough to misfire at higher rpm. If a leak is not obvious, check if it is a leak by buying a can of engine start (or even CRC will do) and spray it all around the inlet manifold. If the idle smooths out while you're spraying then then goes rough again, it is a leak. By spraying in specific areas you can narrow down the area of the manifold or gasket that is leaking.
Hope this helps.
Posted on Oct 26, 2008
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Posted on Jan 02, 2017
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