service engine soon light stays on and when fueling up pump repeatedly shuts off

Asked by Feb 24, 2018 at 10:59 AM about the Chevrolet S-10

Question type: Maintenance & Repair

when fueling (gasing up ) pump repeatedly shuts off. Also service engine soon light stays on. How and what part can I purchase to solve my 2002 chevy s 10 pick up 4.3 problem?

3 Answers

35,915

First, since service light is on, get the codes pulled. Any auto parts store can do this for free. You may have an issue with the EVAP system, which would explain why the gas pump constantly shuts off while pumping gas. (They're designed to do that when pressure builds up on the fill neck.) I suspect your tank isn't venting properly. That could be due to a bad vent solenoid, crimped vent line, or fouled EVAP charcoal canister. (regularly over-pumping gas can leave it gas-soaked.)

1 people found this helpful.
292,265

The gas pump shutting off repeatedly means the filler vent is the issue not allowing enough air to escape. So with the SES light on, I suspect you have an EVAP code. Scan for the code to verify the problem. Knowing what part to replace isn't as easy as it sounds. Someone would need to look at the truck.

Thank you guys in a Super way because both answers cite a possible issue causing the problem. Again thanks and both have narrowed down a path for resolutions. You guys have made my week end in my search for an answer. Extremely helpful - both. Johnny B.

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