Question about Volkswagen Jetta
Replaced plugs ,have a big exhaust leak
Need more information about the vehicle but sounds like the distributor cap and or rotor may be corroded. The points of contact can become covered with electrical corrosion. if you clean the four points and the rotor under the distributor cap it may fix the problem.
Posted on Dec 30, 2012
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Posted on Jan 02, 2017
I have changed a few cylinder heads under warranty for this type of problem. The exhaust valve guides wear, this causes the exhaust valve to seat badly, giving low compression. if one cylinder compresion reading is more than about 50 psi below the others, then this warrants head removal. It is quite a job, due to the fact that the camshft id chain driven. If you are up for it then once the head is removed, poor liquid into the exhaust ports and see if it leaks out through any of the exhaust valves.
Posted on Jul 23, 2009
a lot of people have reported this issue with the 2001 Nissan altima. it is a design flaw and the idle rpm fluctuation is caused by a bad intake manifold gasket. the part only costs about 10 dollars but do to the 5-10 hours it takes to replace it is a very costly on the labor side
Posted on Feb 05, 2010
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