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weird (flooding?) cold start problem 200

uid 18083's pic
posted by  lucid on  Mon Aug 30 12:47 CST 2004
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last visit: Fri Oct 24 12:31 CST 2014
[RELATED]

"It sure feels like flooding to me"

Why guess? Pull a couple of plugs next time you try it. With a car that old, there are too many possibilities to start guessing. But Mario's idea to check for some known suspects can't hurt.

I use Propane to test for vacuum leaks (less messy than carb cleaner or other sprays). Take the nozzle tip off a propane torch and replace it with some snug fitting rubber hose about 2 feet long. Practice with the valve to get a moderate gas flow (not a roaring blast).

With the engine at a warm idle (or barely running if that's all it will do), open the gas valve and poke the end of the hose around each injector for a couple of seconds. If the seals leak, you should hear an RPM change when the propane gets sucked in and burned.

Do the same around any other suspected areas, like hidden vacuum hose ends and the intake manifold gasket itself.

To block the breeze from the fan, lay a piece of cardboard from the fan shroud to the engine.
--
Bruce Young
'93 940-NA (current) — 240s (one V8) — 140s — 122s — since '63.






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