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Stalls at idle

Tiny
SPOILEDBRAT
  • MEMBER
  • 2000 HONDA
  • 3.0L
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 144,000 MILES
When I let my car idle or too long it shuts off and than have to hold the gas peddle until the rpm reach 3000 and than it will start and not shut off. Check engine light is on and stays on with code P0420. It says on the freeze frame that fuelsys1 CL.
I am not sure what the numbers are supposed to be on the rest of the freeze frame information to tell you if it is normal or not. Today it started to feel like its not getting enough gas when you go to take off. It sounds and feels bad when you turn the car off as well.

Changed the spark plugs and alternator was replaced recently as well. Oil change is not due until August. Please tell me where to begin on troubleshooting. I am a female that has done most of the troubleshooting so I jut need some guidance and walk me through the beginning and I can do the rest.
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Wednesday, July 12th, 2017 AT 7:32 PM

7 Replies

Tiny
HARRY P
  • MECHANIC
  • 2,292 POSTS
Solve that PO420 issue. That code is usually for a catalytic converter that is not functioning properly. If the converter is restricting the flow of the exhaust, it will cause the car to feel like it's bogging down and shutting off. If there are no other codes, then I would test for a bad catalytic converter. Here is a guide: https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

Do that and let us know what your results are.
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Wednesday, July 12th, 2017 AT 7:56 PM
Tiny
STEVE W.
  • MECHANIC
  • 13,480 POSTS
Yep, test the converter for flow and back-pressure. Which model Honda is it?
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Wednesday, July 12th, 2017 AT 8:51 PM
Tiny
SPOILEDBRAT
  • MEMBER
  • 3 POSTS
Steve, it is a 2000 Honda Accord V6. I will check the catalytic converter.
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Thursday, July 13th, 2017 AT 5:33 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,702 POSTS
Please let us know what happens.

Cheers, Ken
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Friday, July 14th, 2017 AT 11:55 AM
Tiny
SPOILEDBRAT
  • MEMBER
  • 3 POSTS
Heyman that link isn't working and I'm going to check now but I think it might be my fuel pump. I'm gonna take a picture when I get off and tell me if it doesn't look normal.
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Friday, July 14th, 2017 AT 2:44 PM
Tiny
HARRY P
  • MECHANIC
  • 2,292 POSTS
https://www.2carpros.com/articles/how-to-test-a-catalytic-converter - try this one. You might have to copy and paste it into the address bar
And please stay on course with the catalytic converter. Even if it doesn't solve your running problem, it is a problem that needs to be addressed. And personally, if I were a betting man I'd bet on the cat being the cause of your problems here.
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Friday, July 14th, 2017 AT 6:56 PM
Tiny
STEVE W.
  • MECHANIC
  • 13,480 POSTS
Fuel pump won't cause a P0420. Not possible. But a failed cat which a P0420 indicates can cause the loss of power and hard starting.
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Friday, July 14th, 2017 AT 9:37 PM

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