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Engine Specific Tech
96-04 - 4V Specific
04 mach 1 start/idle issue.
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<blockquote data-quote="96blak54" data-source="post: 1578336" data-attributes="member: 14727"><p>Sounds like a bad fuel rail pressure sensor or a cracked vacuum line to it. The sensors have been know to be crap. If its stock, its probably bad, if its aftermarket, its probably bad. I have zero trust in them darn things. Anyhow, the sensor registers pressure in the fuel rail and relates it to the ecu. Car will run, but hard start, and run/idle like trash. I think they roughly $50 new. And this is not say 100% is your issue, but just some experience ive been through. If you are smelling gas while trying to start, be cautious, its possible the fuel pressue sensor is compromised and transfering gas straight into the intake manifold through the vacuum hose.</p></blockquote><p></p>
[QUOTE="96blak54, post: 1578336, member: 14727"] Sounds like a bad fuel rail pressure sensor or a cracked vacuum line to it. The sensors have been know to be crap. If its stock, its probably bad, if its aftermarket, its probably bad. I have zero trust in them darn things. Anyhow, the sensor registers pressure in the fuel rail and relates it to the ecu. Car will run, but hard start, and run/idle like trash. I think they roughly $50 new. And this is not say 100% is your issue, but just some experience ive been through. If you are smelling gas while trying to start, be cautious, its possible the fuel pressue sensor is compromised and transfering gas straight into the intake manifold through the vacuum hose. [/QUOTE]
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96-04 - 4V Specific
04 mach 1 start/idle issue.
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