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Registered
Join Date: Oct 2005
Location: Riverside,Ca
Posts: 26
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cylinders 5 and 6 not firing
new rebuild on 2.4 w/zeinth carbs. I was running the car in 2 nd gear @5k rpms when it started to not fire on 5 & 6. leakdown for both cylinders cold is 0%. I got spark and fuel. I know i did not overrev the engine. and it happened suddenly. what could it be other than a bent valve.
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03-21-2006, 07:18 AM
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PRO Motorsports
Join Date: Nov 2001
Location: Burbank, CA
Posts: 4,580
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When you say 0% leakdown, do you mean it's holding 100%, or it's losing 100%?
If they are holding full pressure, then it would have to be fouled plugs. Or flooding float bowl, since those two cylinders share a common float chamber. If the stuck, or the needle and seat aren't sealing, it would flood those two cylinders and fuel foul the plugs.
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'69 911E coupe' RSR clone-in-progress (retired 911-Spec racer) '72 911T Targa MFI 2.4E spec(Formerly "Scruffy") 2004 GT3 |
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03-21-2006, 12:23 PM
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Registered
Join Date: Feb 2006
Location: Oahu
Posts: 2,303
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I've never seen "0" leakage before. Are you sure?
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Jon |
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03-21-2006, 04:32 PM
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Registered
Join Date: Oct 2005
Location: Riverside,Ca
Posts: 26
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It turns out that their was debris in the jets to those cylinders. It now fires on all pistons but running rough. slight miss thorugh out the rpm range. It miss's less when I get on the throttle hard.
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03-23-2006, 04:16 PM
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