Will not idle pass 2,000 RPM nor will it run pass 20 mph?

MARYLOVE

MEMBER
2001 KIA OPTIMA
2.4L
4 CYL
2WD
AUTOMATIC
150,000 MILES

Hi my car turn on it will not idle pass 2,000 rpm nor will it run pass 20 mph, I don't have a check eng. On but have change the iac valve, I clean the egr valve and the tps as well. Can anybody help me thanks.

Tuesday, February 3rd, 2015 AT 9:40 AM

2 Replies

HMAC300

MECHANIC
48,601 POSTS

Clean throttle plate on both sides and iac hole with choke cleaner check for a vacuum leak, bad hoses etc.

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Tuesday, February 3rd, 2015 AT 10:26 AM

KEN L

MASTER CERTIFIED MECHANIC
47,536 POSTS

It sounds like you have a clogged up catalytic converter. This guide can help you confirm the problem.

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

Also, please go over this guide can as well to help understand the problem better.

https://www.2carpros.com/articles/engine-has-low-power-output

here is the location of the cat so you can do the testing. Check out the images (below). Please let us know what happens.

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