Stalls at idle

2007 FORD F-150
180,000 MILES • 4.6L • 6 CYL • 2WD • MANUAL
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ALSTONE
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Only with a full tank of gas truck runs rough and stalls at idle after driving if I start and let idle it is fine. No engine lights. Did get a check fuel cap. But that was not the case when the problem started. I drove it for three weeks only filling it half full and it drove fine. Then I filled it up and the same problem.
Jun 20, 2017 at 7:53 AM
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HMAC300
  • ✓ASE Certified Mechanic
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  • ASE Certified Mechanic
have it scanned for codes see it there is a fuel pressure sensor issue or if there is an EVAP issue. it may be EVAP canister is full of gas and not getting good vacuum.
Jun 20, 2017 at 8:24 AM
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ALSTONE
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I just changed out the EVAP canister thinking that was it. At the ford dealership they checked for codes and nothing came up. They could not duplicate the stall since at that time my gas tank was low enough and I did not realize it was connected to a full tank.

Jun 20, 2017 at 9:37 AM
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HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
just for the heck of it try cleaning throttle plate on both sides and IAC hole with choke cleaner see if that takes care of it. you might see if any vacuum lines are disconnected or kinked as well especially ones leading to EVAP.
Jun 20, 2017 at 11:58 AM
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