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engine missfire hard starting pulling codes

 
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Old 10-03-2012, 05:27 PM
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engine missfire hard starting pulling codes

I hope someone can help. I have a 97 prelude ran good til it ran out of gas. (found out gas gauge doesnt work). Anyway i put gas in it. Now I have to hold pedal to floor to start then stalls at idle and engine misses throughout rpm range. I checked pump and screen, pump runs screen is clean, tank is clean. Changed fuel filter just to make sure. Scanned computer pulled p0301 cylinder 1 missfire and p1399 random missfire. Changed plugs gapped correctly changed coil. Checked wires cap rotor dis. Swapped around injectors no change. Egr was eliminated a while ago when i put new intake manifold on, ran well before now so i cant see it being related. So if anyone had any ideas please let me know im out of ideas.
Thanks Cody
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Old 10-03-2012, 08:53 PM
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Re: engine missfire hard starting pulling codes

Injectors?
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Old 10-03-2012, 09:25 PM
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Re: engine missfire hard starting pulling codes

he said he swapped the injectors around and it didnt change. im assuming he meant that he cleared codes swapped injectors around and still got cylinder 1 misfire.
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Old 10-03-2012, 10:37 PM
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Re: engine missfire hard starting pulling codes

yea i cleared it and still pulled same codes
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Old 10-04-2012, 02:24 AM
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Re: engine missfire hard starting pulling codes

valves might be out of adjustment, could be a bad head gasket, timing might not be right, do some more maintance maybe, seafoam, new air filter? check for a vacuum leak, any reason why your exhaust would be clogged maybe? crankshaft or camshaft position sensors, some components of the valve train might be worn.

have you done a compression test? air/fuel mixture might be too lean.....

theres lots of things that can cause the cylinder to be misfiring
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Old 10-04-2012, 06:18 PM
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Re: engine missfire hard starting pulling codes

well i pulled the valve cover and found a broken valve spring retainer on cylinder 1 intake side. obviously thats the problem. thanks for the thoughts. if anyone has any advice for the job it would be greatly appreciated
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Old 10-04-2012, 09:27 PM
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Re: engine missfire hard starting pulling codes

good you found the problem, good luck with the fix

bump, someone who knows let him know
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Old 10-04-2012, 09:35 PM
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Re: engine missfire hard starting pulling codes

Try a compression test across all cylinders. if cyl. 1 is showing a bad compression, I'd suspect the head gasket located around it, or excessively worn piston rings. You did say you already swapped around the injectors, installed a new coil, and gapped the spark plugs to specifications, so I'd suspect the head gasket and/or the worn rings.
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