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won't cold start help please

 
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Old 06-26-2012, 02:14 AM
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won't cold start help please

89 prelude 4w steer eng no B20A62004644 has PGM-FI and WILL NOT start without 5 mins of cranking with eventual firing on 2 cylinders for 30 seconds before all fire OK .Replaced engine speed control valve ,checked fuel pump ,filter and pressure all OK distributer cap replaced and all plugs good.
NO ERROR CODES. behaves just like carburettor car in cold weather with no choke. When warm all is fine
Auto technician and I are baffled. Help please
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Old 06-26-2012, 07:08 AM
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Re: won't cold start help please

Might need to do a full tune up along with making sure the valve cover gaskets aren't leaking into the spark plug holes. That means full tune up.Plugs, wires, rotor, dist. cap.
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Old 06-26-2012, 12:39 PM
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Re: won't cold start help please

Possibly weak or clogged injectors, or leaky fuel pressure regulator. Try running a tank of gas with some fuel injector cleaner and then replace the fuel filter.
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Old 06-26-2012, 07:09 PM
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Re: won't cold start help please

I like above advice. How about a tune-up?

Also, check your timing belt position and also ignition timing.

Also do a compression test. Could be a cracked head (hairline crack) or head gasket issue. Sometimes, a head gasket will have a pinhole leak when the engine is cold. Once the engine warms up a little, expansion takes over and closes the void enough to produce normal compression. So the compression test needs to be done after the car sits overnight.
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Old 06-26-2012, 11:12 PM
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Re: won't cold start help please

thanks everyone keep thinking!!
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Old 06-29-2012, 12:26 AM
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Re: won't cold start help please

all those guys have awesome advice definitley check out those injectors and the head gasket stuff sounds legit i would look into doing a compression test for sure
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