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What could be causes for long crank while hot but instant start when cold?

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Old Dec 22, 2018, 03:06 AM
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Question What could be causes for long crank while hot but instant start when cold?
Seems like when car is cold it starts instantly, no problem. When its hot, sometimes it starts fast but sometimes takes 3 to 4 seconds of cranking before starting. This a symptom of something?
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Old Dec 26, 2018, 12:31 PM
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check fuel pressure & residual pressure.
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Old Dec 26, 2018, 03:05 PM
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In for suggestions. Mine has done it since being tuned with a certain version of software. Curious to see if it's something mechanical and was just a coincidence.
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Old Dec 26, 2018, 04:25 PM
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Originally Posted by kaj
In for suggestions. Mine has done it since being tuned with a certain version of software. Curious to see if it's something mechanical and was just a coincidence.
Same here. Always get a quick light off but with a heat cycle still present it takes a few cranks & kinda stumbles alive
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Old Dec 26, 2018, 04:42 PM
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Originally Posted by MinusPrevious
Same here. Always get a quick light off but with a heat cycle still present it takes a few cranks & kinda stumbles alive
Mine started when I went to Tehpra v7. I've blamed my mini battery, IACV, and anything else I can think of.
Sometimes ,I have to give it some pedal to start. Only when warm.
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Old Dec 26, 2018, 10:09 PM
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Im seeing reports of Cam position sensor being the culprit. Anyone try replacing theirs? Im thinking about giving it a shot.
Part - MD348074

Video on replacement -
Last edited by Chrushev; Dec 26, 2018 at 10:16 PM.
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