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Engine Power Loss?

Tiny
SKRAMSEY
  • MEMBER
  • 2003 KIA SORENTO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 135,000 MILES
While driving around town the Sorento does great, but while I am on the interstate travelling 65-70 MPH, It seems to lose power and slow down, and will not accelerate. If I pull over and startup it does fine until reaching those speeds again. What might my problem be?
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Monday, July 13th, 2009 AT 4:25 PM

2 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,164 POSTS
I would check two things. First, make sure the fuel pressure is good. Here is a How to:

https://www.2carpros.com/how_to/how_to_check_fuel_pressure.htm

If it is good, have the catylatic converter checked to make sure it isn't plugging. Also, I am assuming that the check engine light isn't on. If it is, let me know.
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Tuesday, September 1st, 2009 AT 9:05 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,164 POSTS
Hi,

I'm sorry, but they never followed up. Is your vehicle the same year make and model? Does it have the same size engine?

If so, have you checked the fuel pressure? As mentioned above, that is where I would start. If the fuel pump can't keep up, what was described can happen.

Let me know.

Joe
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Friday, March 17th, 2023 AT 7:23 PM

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