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Matt
Matt, Engineer
Category: VW
Satisfied Customers: 20594
Experience:  Mechanical Engineer with 20 years experience in the auto industry, 8 yrs in formula 1 engine testing
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Volkswagen: 2002 Jetta gas, starts then stops

Customer Question

2002 Jetta gas, starts then stops
Submitted: 1 year ago.
Category: VW
Expert:  Matt replied 1 year ago.
Hello
if the engien starts then immediatly stops then I'd say that this sounds like a lack of fuel and could be a lack of fuel pressure from the electrical pump at the tank.
If the connections to the pump are corroded or damaged then the pump could stop at any time or could not be running at full speed. Check that its relay switches in and out and the relay contacts are clean and bright – replace the relay if in any doubt and do the same for the fuse,
Ideally measure the pressure at the injectors and if this is low check the pump as described and also consider changing the fuel filter as if this partially blocked this too will reduce pressure.
this is assuming that you don't have any check engine lights on - if you do then the next step should really be to have a diagnostic device plugged in as this is by far the fastest way to repair
Expert:  Matt replied 1 year ago.
hi
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