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Banned
Join Date: Jan 2006
Location: Chicago
Posts: 570
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CO/Idle: car dies after warmed up
My cars just stinking like gas every time I come to a stoplight or pull into my garage and idle it for the typical 1-2mintes before shutting her down. Here's the story, at cold startup, she starts/idles fine right around 950-1000rpm. Then after engines warmed up a little, she'll die if I dont keep blipping the gas pedal at idle. Is this my CO adj or idle adj?
or something else altogether? Sometimes the rpm's lag down so low the red engine light comes on, and she struggles to stay alive. Im thinking its got to be my idle screw is set too low perhaps? I have an Andial IC, stock everything else. guys, any ideas? thanks |
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03-12-2006, 05:03 PM
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Crotchety Old Bastard
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You don't say what car you have. I gather it is an early CIS 930.
First off you don't need to let the car idle before shutting it down - unless you have just finished a lap at the track. What you describe sounds like the control pressure is not high enough when the engine is warm. Cold Pressure Spec @ 70F = 1.0-1.5 bar (~20psi) Warm Pressure Spec @ 70F = 2.6-3.0 bar (~40psi) If your WUR is not achieving a minimum of 2.6bar your engine should run rich. I'd set the idle up enough to keep the car running and check your fuel pressure. If all is good then adjust the CO to 3%. Can you tell us a little more about the engine, such as what year it is and what emmision/CIS equipment it has?
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds '78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8 |
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03-12-2006, 06:50 PM
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Banned
Join Date: Jan 2006
Location: Chicago
Posts: 570
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Im a moron, I know!
oh so sorry, '88 930 CIS car with 53k miles, Adial IC , no other mods, stock headers, cat delete, muffler gutted out.
I adjusted the CO although I have no way to measure cuz I dont have a CO meter, basically I leaned it in tiny increments until the engine stopped "hunting". Now only thing is my idle's too low(about 600rpm), but I cant seem to find that darn idler! Ive got pics of where its at, right behind the IC accessible from drivers side, reached back there with a long 12" screwdriver but couldnt find it. Will try again tomorrow. I also went out and bought a multimeter to measure dead on the rpm's so I dont have to keep looking on the dash while Im adjusting the idler, question is how do I hook it up to the car? i threw out the box with the instructions by accident!%$@ Last edited by diabolos88; 03-12-2006 at 07:36 PM.. |
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03-12-2006, 07:29 PM
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78 Porsche 911SC 3.0L, 3.3Turbo soon. 
