2000 Kia Sephia
Problem for Kia 2000 Sephia

Head lights dimming and losing power while driving




By rfcharles2 on Feb 03, 2009

" "
Driving down the highway I started losing power. The car almost died. pushed in the clutch to pull over and the power came back. let up on the clutch and the same thing started happening again. Replaced the battery, fuel filter and air filter. now the loss of power doesn't make the car almost stall but dims the lights and still losing power. most notably on the highway. Could this be the sparkplugs? the altinator checks out fine and the dealer can't find anything wrong.

thank you for any help with this (120,000 miles)
Comments:

Feb 03, 2009

- Thank you. I will mention this to the dealer and have him look into this

Feb 03, 2009

- can you tell me where the gas cap vent is? Do I need a new gas cap? I want to understand what this is so I can explain it to the mechanic at the dealership

Feb 04, 2009

- Thank you very much. I mentioned this email to the mechanic at the dealership today and he said he would look into it. I'm lucky to have a dealer that doesn't charge anything for the time they spend trying to find the problem.

thanks again I really appreciate your time and help

Best Solution

posted on Feb 03, 2009
Helpful)

zero-7

Rank: Master 
Rating: 87%, 17 votes
Next time this happens, pull over and unscrew the gas cap. The vent may be clogged.

Otherwise, your catalytic converter may be failing. It can also clog and hinder engine exhaust.

Good luck !
Comments:

Feb 04, 2009

- Hi again...

The vent is part of the gas cap and cannot be replaced on its own. You need to replace the cap as a whole.

Befor you do that, try what I suggested. When you start losing power on the highway, pull over, unscrew the gas cap, then get back in and drive. The Check Engine light may come on without the cap - don't worry about that for now.

If the power loss does not return, the gas cap is at fault. Go get a new one.

If the power loss returns even without the cap, your problemm lies elsewhere...perhaps a clogged catalytic converter.

Hope this helps !

Marco
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