Question about 1997 Volkswagen Jetta

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Jetta won't start when conditions are damp, very intermittent.

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It sounds like you may have a faulty MAP sensor. The MAP sensor reads the Manifold absolute pressure which sends signals to the ECM, then the ECM will control the amount of fuel used to get the engine started. The best thing to do is go to Auto Zone and have them scan the car for any DTC codes in the history and hope that will help you address any issues that is causing your no start's during damp conditions. Good luck and keep me posted. 

Posted on Sep 30, 2009

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Posted on Jan 02, 2017

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Starts hard when it rains


cover the distributor cap with plastic and the high voltage coil.

with a damp environment, high voltage usually jumps to the nearest ground and would not go to the spark plug.

you can test this at night when it is damped and raining, at night, let some body start the car for you and you watch the engine compartment without light so that you can trace where the spark is jumping out.

tnx 4 using fixya,

drcool

Oct 09, 2008 | 1998 Volkswagen Jetta

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