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Won't start unless gas is held down.

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Old 10-03-2011, 10:48 AM
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Default Won't start unless gas is held down.

I'm not sure if this belongs here or not. Might be for the tech/misc section.

Yesterday I went to start my car to move it and after a few seconds it just shut off. It won't start back up unless you hold the gas in. Then it runs rough as hell and sounds like a Subaru. I had some spare distributor stuff laying around so I changed it out just to see and nothing. Coil-cap-rotor
I put new plugs in it and pulled them after I got it to start. They are black as coal and wet from gas. I was tuned in June so I'm not sure if that may have something to do with this or not. It was done at IMW by John Kerr and I know he's good at what he does so I wouldn't think that's the cause but who knows.

Any suggestions?
Old 10-03-2011, 11:59 AM
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Default Re: Won't start unless gas is held down.

i kinda have the same situation with my car in a way, i had the vavles adjusted and it helped a little.. new dizzy, injectors and nothing the head when i got it had 4 bent valves and replaced them with used ones i bought on ebay and i lapped them in and seemed to seat correctly but when i did a compression check later on that cylinder had low compression so i either have bent valves or they are not seated properly and that makes my car run like that to where i give it gas to start it and it will run like a suby for a sec or two then straiten out.. so idk maybe a valve adjustment for you or do a comp test?
Old 10-03-2011, 12:41 PM
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Default Re: Won't start unless gas is held down.

my car does the same thing. I have to hold the gas to get it to start then itll idle fine
Old 10-03-2011, 12:44 PM
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Default Re: Won't start unless gas is held down.

Check electrical connections and grounds. What did you use for tuning; can you datalog?
Old 10-03-2011, 01:22 PM
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Default Re: Won't start unless gas is held down.

Turned out it jumped time sitting in my driveway. I got it to start and idle again on it's own power. Revs up kinds rough so I believe it's still maybe 1 tooth out. At least I know where to start again when I get back to it. I was doing this in the driveway and it's raining plus 45 degrees so I called it quits for the day.
Old 10-03-2011, 04:26 PM
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Default Re: Won't start unless gas is held down.

was gonna say MAP sensor...
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