Can a worn gas cap effect fuel pressure
#3
Registered User
on older vehicles that are vented through the cap a plugged vent will create a vacuum in the tank and starve the engine of fuel. old school trick was to loosen the cap and see if it ran better. I doubt anything with fuel injection would have issues like this.
#4
Registered User
A carburetor is more about fuel volume than fuel pressure. The stock mechanical fuel pump only has about a 4-6 psi output.
What does affect the fuel system is the float level.
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