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Join Date: Mar 2004
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Weird 996 problem. No start
I have a weird problem with a 996 that doesnt want to start. It doesnt want to start when its been warmed up for a couple hours, and then shut off for several minutes. It will restart if you try to start it immediately, but if you let it sit for a few minutes it wont restart for a couple hours after everything has cooled back down again. Not throwing any codes. Replaced: fuel pump, fuel pressure regulator, 3 crank sensors, Idle stabilizer, engine compartment temp sensor, and water temp sensor. I have verified the fuel pressure is good and the injectors are firing. I am pretty much at my wits end on this. Any ideas?
james
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james www.gruppe9autowerks.com Its not how fast you go...its how you go fast Last edited by j911brick; 04-09-2018 at 05:47 AM.. |
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Well u need fuel, air and spark to make a motor run. Sounds like u have covered fuel, i assume u have checked for rodents in the air filter housing
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Quote:
All six coils would have to fail at once for it not to start.
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Check your purge control valve. It lives on the drivers side of the throttle body.
Part no 996 110129053 m100 Looks like this ![]()
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2013 991.1 Carrera S Cab 2004 996 Turbo CAB X50 sold 2003 996 cab 6 speed Sold 1972 RS 3.2 twin plug short stroke crank fire, roll bar, sold DE instructor since 1985 |
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I have been suspicious of that valve, but dont know how to test it.
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With the electrical plug unplugged no air should be able to pass through in the direction of the throttle body. Really not either way. With power to it air should pass through.
This valve allows fuel vapor to pass through the charcoal can purging it by pulling fuel vapor through the engine. This alters the fuel/air mix in an uncontrolled manner. With the engine fully warmed up, running at a predetermined RPM, this valve clatters like a fuel injector as long as a vapor recovery test is not being performed. Next time this happens try holding the gas pedal down to see if it helps.
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2013 991.1 Carrera S Cab 2004 996 Turbo CAB X50 sold 2003 996 cab 6 speed Sold 1972 RS 3.2 twin plug short stroke crank fire, roll bar, sold DE instructor since 1985 Last edited by FPB111; 04-20-2018 at 02:50 PM.. |
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Quote:
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Youre the winner. This valve was the problem.
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Great Job..
Amazed at the expertise of the people on this site. Another problem solved.
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wow. that was impressive. kudos and congrats
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99 911 Carrera 2, factory LSD, GT3 aero 85.1 944, white with tan scripts *sold* 88 944 azurite blue at to mt swap and restoration/upgrade |
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And if you want to know if this valve is a problem then just clamp off the soft portion of the hose. Car will run fine like that.
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Interesting thread. On a 997.1 C2S (3.8 ltr) where is this purge control valve?
I think this car has a different evap setup from a 996 or a 3.6 liter 997 Thanks Todd 07 C2S cab |
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On a 996 the valve is adjacent to the throttle body in plain sight. Could very well be different on the c2s since many things are different on the S.
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