2008 kia rio smoking from under hood

Asked by Jan 14, 2017 at 04:56 PM about the 2008 Kia Rio Base

Question type: Maintenance & Repair

Ok 2008 kia Rio is smoking from under the hood
and out into the cab if the car. But just when
starting and then it clears. Also will not go above
like 20 or 30 miles an hour. We just replaced the
catalect converter, the ignition coils and spark
plugs. We got the codes read at the auto store.
One says multiple misfires. One says system to
rich and two say that 2 and 4 are not firing at all.
I'm trying tie avoid going to a mechanic if I can do
the work with my husband but we are stumped
right now. Help please.

2 Answers


"Any, some or all of a hundred different causes for your problem" Having similar problems myself. I hope you got it fixed, I'd be very interested in what is wrong. For me, it started with rough running, replaced spark plugs, no effect. Replaced coil, same code. Moved the misfiring coil to an new position misfire remained and a new different cyl started misfiring. Tried a whole new coil loom, no effect. Lots of back pressure, found the undercar CAT clogged. Knocked the CAT clear out = no effect. I've cleaned out the throttle body, soaked the fuel injectors in cleaner, wont start. There is an idle sensor bolted on to the throttle body that gets blocked up with road soot, took that off and cleaned it.


Also, did you replace which CAT? the one attached to the manifold or the one under the car? If the manifold cat is failing it could plug your new CAT under the car.

Your Answer

Kia Rio Experts

  • #1
  • #2
  • #3
    Tom Demyan
View All

Related Models For Sale

Used Kia Rio5
21 Great Deals out of 695 listings starting at $900
Used Hyundai Accent
43 Great Deals out of 1,444 listings starting at $2,222
Used Hyundai Elantra
159 Great Deals out of 3,810 listings starting at $2,280
Used Toyota Corolla
149 Great Deals out of 3,672 listings starting at $2,495
Used Honda Civic
252 Great Deals out of 4,527 listings starting at $2,495
Used Kia Optima
36 Great Deals out of 792 listings starting at $5,979
Used Ford Focus
53 Great Deals out of 2,399 listings starting at $1,495
Used Nissan Versa
41 Great Deals out of 413 listings starting at $1,895
Used Nissan Sentra
113 Great Deals out of 1,856 listings starting at $2,200
Used Ford Fiesta
31 Great Deals out of 719 listings starting at $2,995
Used Mazda MAZDA3
123 Great Deals out of 2,689 listings starting at $1,995

Used Cars For Sale

2018 Kia Rio For Sale
119 listings starting at $15,605
2017 Kia Rio For Sale
57 listings starting at $11,995
2016 Kia Rio For Sale
6 Great Deals out of 57 listings starting at $8,466
2015 Kia Rio For Sale
5 Great Deals out of 42 listings starting at $7,990
2014 Kia Rio For Sale
6 Great Deals out of 75 listings starting at $7,495

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.