Any ideas on why RPM need would bounce and check engine light come on for a few seconds?

50

Asked by Jun 04, 2013 at 07:31 AM about the 2005 Kia Optima

Question type: Maintenance & Repair

RPM needle drops down to 0, bounces and then goes back to normal while going 50-70mph. When the needle goes back, the check engine light comes and then turns off a couple seconds later. I can feel a slight change when light comes on and off, like I pulled my foot off gas for a split second.

Took it to a mechanic and when he ran the check engine light codes there was nothing registered. Took it to him while check engine light was on and he said it was a misfire in cylinder 1 and 2. Replaced the throttle position sensor (tps), coils, spark plugs and plug wires. Got the car back today and it is still doing it.

Please help!!! This has been going on for a few months now and still no answers. Thank you!

Kia Optima 2005, 120k miles

8 Answers

274,405

Without knowing the codes, I can't help much besides telling you to take it back to your mechaninc and tell him he didn't fix the problem. You can scan for codes without the light on BTW. They are stored in memory until cleared.

2 of 2 people found this helpful.
130

i had the exact same problem today, mine is a 2003 optima with 140k miles on it

7 of 7 people found this helpful.
50

We finally got it fixed and it was a faulty ignition sensor. Hope that helps your KIA! Good luck. It was the oddest thing that it never saved on the check engine light codes, but after over a month of it acting up my mechanic figured it out. Runs great again now.

5 of 5 people found this helpful.
130

thanks! in the past few weeks, the needle would drop for a second, and id lift my foot off of the gas, and it would be fine, but today it shut down completely to where i had to pull over and restart. ill have it checked out and repaired. thanks again for the info

3 of 3 people found this helpful.
130

hello adierks3- would that be the same as ignition failure sensor?

3 of 3 people found this helpful.
50

Yes that was it, sorry.

10

Had loss of power for a short time and engine light came on. Went away, then came back. Tachometer had intermittent operation. Instead of going through the troubleshooting steps of measuring opens/shorts, etc., replaced ignition failure sensor. $92. Check engine light not on anymore and car seems to run fine. Tachometer behaving well again.

1 of 1 people found this helpful.
20

My 2013 optima is doing it now, but no check engine light came on. Took it back the the dealership where I got it from and they don't know what's wrong with it. They had my car for 4 days and could not figure out what was wrong with my car. Then taday it happened again. I have to take it in on Monday to see why this keep happening.

2 of 2 people found this helpful.

Your Answer

Optima

Looking for a Used Optima in your area?

CarGurus has 32,319 nationwide Optima listings starting at $2,450.

ZIP:

Kia Optima Experts

  • #1
    Tom Demyan
    Reputation
    1,080
  • #2
    kc07kia
    Reputation
    470
  • #3
    James Warner
    Reputation
    440
View All

Related Models For Sale

Used Honda Accord
858 Great Deals out of 88,772 listings starting at $1,444
Used Hyundai Sonata
642 Great Deals out of 54,842 listings starting at $1,500
Used Toyota Camry
1,111 Great Deals out of 78,194 listings starting at $1,100
Used Nissan Altima
1,151 Great Deals out of 76,224 listings starting at $900
Used Ford Fusion
953 Great Deals out of 64,034 listings starting at $888
Used Chevrolet Malibu
1,080 Great Deals out of 54,838 listings starting at $1,250
Used Honda Civic
641 Great Deals out of 54,520 listings starting at $1,500
Used Nissan Maxima
347 Great Deals out of 21,020 listings starting at $1,175
Used Dodge Charger
347 Great Deals out of 36,030 listings starting at $1,999
Used Hyundai Elantra
601 Great Deals out of 47,373 listings starting at $495
Used Chevrolet Impala
507 Great Deals out of 32,641 listings starting at $1,000
Used Kia Sorento
486 Great Deals out of 34,866 listings starting at $1,800
Used Mazda MAZDA6
179 Great Deals out of 12,246 listings starting at $1,900
Used Toyota Corolla
926 Great Deals out of 70,852 listings starting at $1,479

Used Cars For Sale

2018 Kia Optima For Sale
4 Great Deals out of 17,220 listings starting at $13,995
2017 Kia Optima For Sale
115 Great Deals out of 2,257 listings starting at $12,099
2016 Kia Optima For Sale
36 Great Deals out of 2,085 listings starting at $9,119
2015 Kia Optima For Sale
202 Great Deals out of 5,142 listings starting at $7,995
2014 Kia Optima For Sale
64 Great Deals out of 1,636 listings starting at $7,799

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.