Question about 1998 Volkswagen Jetta

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98 Jetta won't start on hot days

I am so glad that I am not crazy! My Jetta just recently started having this problem where it won't start when it is hot outside. It takes me almost 20 minutes to cool the interior of the car down and just so I can get it started. It is such a pain!!! But on cool days or in the early a.m. or at night it usually starts right up. Its making me crazy and it seems that no one has an answers! Arghhh!

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I think u need to check ur ignition mudule,should be located somewhere unrthe dashboad

Posted on Oct 04, 2009

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Check the map switch

Posted on Jul 13, 2009

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If it's only hard to start when it's warm, I would have to suspect the Engine Coolant Temperature (ECT) Sensor. Volkswagen does not give specific measurements for the ECT and it has to be tested with a scan tool. The temperature should be within one or two degrees of the coolant temperature as measured with a thermometer. This part has been known to make a hard start for the Jetta, it was an issue I had also. Below are the part numbers of the old faulty one and the good one. I attached a link to a page showing how to change out the old one. OLD -Temperature Sender (Black)Part#: J78-919-501C
NEW/Updated - Temperature Sender (Green)
Part#: 059-919-501A
O-Ring
Part#: N90316802
Retaining Clip
Part#: 032-121-142

http://forums.vwvortex.com/zerothread?id=1287042

Posted on Oct 02, 2009

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I have an issue with a 98 Vw Jetta. It will crank but will not start. It is getting fuel to the injectors and does have a spark coming to the cap. It will not turn over. We have replaced the cap...spark plugs...injectors.... ignition coil is working fine because it is getting a spark. Do not think the thios car had a crank sensor cause we are unable to see one. What could be the issue?

Posted on Oct 18, 2009

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hallo
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