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I think my low pressure fuel pump is failing

marauder

Go Kart Newbie
Location
Northern Va
I'd second removing the JB4. See if that corrects the problem. As the JB4 does adjust your LPFP sensor it could be adjusting it incorrectly and causing a problem.

Using VCDS to log your fuel pumps duty cycle at idle would also be quite helpful as you can see if it's overworking.

Doesn't sound like a lubrication issue as people mentioned. You said you had 15 miles left till empty. There's still the reserve gas in the tank so you still had a good 2 gallons left.
 
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