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Alan L Alan L is offline
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Join Date: Apr 2006
Location: New Zealand
Posts: 3,261
I would not discount the cold start valve malfunction - until you can be sure it is working.
You may have simply adjusted the idle screw mix pig rich to compensate and run rich when warm as a result.
You could also check the WUR is working properly. Cold pressure about right - but is it rising when warm - to lean the engine out.
It should rise about about 15 psi - depends a bit on which model engine/WUR you have. But it should rise by this ball park number. If it does not, the WUR is malfunctioning.
The cold start valve will seize over time if not used. If you can acess it at all (hard to get at - below and behind fuel head), you should feel it click (solenoid activated injector) when cranked on start. Maybe it is not supposed to work at 95 deg - but I would still check it if possible.
Old 07-08-2008, 06:06 PM
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