Question about 1992 Buick Regal

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92 Buick-On restart, it runs rough and acts like a partial vapor lock action. Always running smooth before shut down. Then, after the restart, it acts also like it's on a cold winter day and trying to go while moving out. Gets real.

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Bad Ignition Module

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2003 buick lesabre ac fan runs when car is cut off


How long does it run? The reason I ask is because it is designed to run after engine shut down under certain conditions of temperature to cool down the engine and prevent vapor lock in the fuel rail. If it just stays running all the time after the key is turned off that is of course a problem.

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98 olds bravada. Acts like fuel vapor lock. New pump 1 year new filter 1 month. When it happens outdide temp over 103 and will restart after a few mins.


Do you hear cooling fan coming on ? After you shut the vehicle off the fans will still run for up to seven minutes if hot !

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Vapor lock occurs when the gas in a fuel line turns from liquid to vapor, before it reaches the engine. The first signs of vapor lock are normally when your engine begins to run roughly. The engine may sputter and hesitate. It will then stall completely and refuse to restart. It may seem like the car is out of gas or the fuel pump has failed. While these are possibilities, vapor lock may be the problem.

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check you have good earthing points, also check the earthing strap from engine to shell. main earthing point follow the negative lead it will go to the shell.

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