Runs good for a few minutes then loses power

Tiny
WRIGHTWRONG1984
  • MEMBER
  • 2000 KIA SEPHIA
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 125,000 MILES
It starts runs good for about five minutes then loses power. I have to cut it off and it cranks right back up. Every time runs fine five or ten minutes.
Wednesday, May 22nd, 2019 AT 7:11 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,300 POSTS
Welcome to 2CarPros.

This can be a few different issues. First, is the check engine light staying on when the engine runs? Does it come on when power is lost? If it is on, you need to scan the computer for diagnostic trouble codes. Here is a quick video showing how it's done:

https://youtu.be/YV3TRZwer8k

I realize most people don't own a scanner, but often times, a parts store will do it for free or rent or lend you a scanner.

Now, the reason I suggest checking for codes is because there are multiple things which can cause this. Components such as a bad crankshaft position sensor, low fuel pressure, partially plugged catalytic converter and the list goes on.

Check that and if you find codes, let me know what they are. Also, if the light isn't on, here are a few links you may find helpful. They discuss fuel pressure testing, symptoms of a bad crankshaft position sensor, how to check a catalytic converter and so on.

https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor

https://www.2carpros.com/articles/bad-catalytic-converter-symptoms

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Let me know what you find or if you have other questions. Also, I will watch for your reply.

Take care,
Joe
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Wednesday, May 22nd, 2019 AT 7:26 PM

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