Re: Dad's 91 caddy fuel pump went


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Posted by 92sub (198.208.159.20) on 06:51:31 12/21/07

In Reply to: Re: Dad's 91 caddy fuel pump went posted by Ben

Sitting in the fuel rail of the hot engine is what makes it hot. The pressure regulator isn't an ON/OFF switch, it's more like a dimmer switch. There's always some amount of fuel going by which returns to the tank. The very latest injection systems are 'returnless'. They still have a regulator but it's inside the tank (along with the non-serviceable fuel filter).



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