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2011 Kia Sorento random starting issues / relay issues


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Phantaz
New User

Nov 9, 2021, 8:33 PM

Post #1 of 8 (1267 views)
2011 Kia Sorento random starting issues / relay issues Sign In

Greetings. Need help troubleshooting a relay question/problem.
2011 Kia Sorento EX V6 2WD
158k miles

Car is dying randomly while driving, and will not restart. Also, randomly does not start after sitting for any given period of time. When driving, usually there is a sudden jerking and a loud clunk. At times the RPM will rise to 5-6k other times, the engine just stops.

After trying to troubleshoot, with the wife pushing the start button, I would hear a click from the relay box under the hood. Slightly touched the Fuel Pump Relay and noticed a winding/electrical noise and then the car would start right up. Replaced the Fuel Pump Relay, seemed to work this morning, but on my way home, the vehicle died on me multiple times. I would pop the hood, slightly jiggle the relays, and it would start right up again. Is it another relay that is bad that would affect starting/killing the motor, did I replaced the wrong relay, is there a possibility of the whole relay box being bad, not grounded, or ...? Trying to figure out what the next step is, not much experience with relays and/or relay components.


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Nov 9, 2021, 10:47 PM

Post #2 of 8 (1251 views)
Re: 2011 Kia Sorento random starting issues / relay issues Sign In

Get codes read and post the results - codes, not what some readings may say to replace or do.

The rise to 5-6K (RPM) sometimes is a clue so far to me,

T



Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Nov 10, 2021, 4:03 AM

Post #3 of 8 (1240 views)
Re: 2011 Kia Sorento random starting issues / relay issues Sign In

Sounds like you may have a power supply issue going into the relay/fuse box. Check all the power connections and grounds.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Phantaz
New User

Nov 10, 2021, 6:11 AM

Post #4 of 8 (1227 views)
Re: 2011 Kia Sorento random starting issues / relay issues Sign In

Tom Greenleaf - It is not throwing any codes. Only odd thing it is doing is after the car dies and is restarted after jiggling the Relay(s) is the Downhill assist (red instead of green) and ESC dashlights are on, and occasionally the low tire pressure light.


(This post was edited by Phantaz on Nov 10, 2021, 6:13 AM)


Tom Greenleaf
Ultimate Carjunky / Moderator
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Nov 10, 2021, 8:34 AM

Post #5 of 8 (1207 views)
Re: 2011 Kia Sorento random starting issues / relay issues Sign In

If playing with that relay changes this, Hammer was saying to check for power and grounds. I'll just add fuse/relay if in a box/panel underhood if connections are bad for any reason that has to be fixed up. Is was a cover or anything out of place to get wet? Visual then be ready for testing - go easy just tossing relays (mark them, save it) not for $ back so if no change you know it was good and a waste,

Tom


Phantaz
New User

Nov 10, 2021, 12:00 PM

Post #6 of 8 (1193 views)
Re: 2011 Kia Sorento random starting issues / relay issues Sign In

Once I get home this afternoon, I will test as much as I am able and reply back. Maybe I will have more information to help with a diagnosis. From first visual inspection, there does not seem to be any moisture or water damage and no corrosion that I noticed, but will be looking for that.


Hammer Time
Ultimate Carjunky / Moderator
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Nov 10, 2021, 1:15 PM

Post #7 of 8 (1187 views)
Re: 2011 Kia Sorento random starting issues / relay issues Sign In

Turn the key on before you start and then start wiggling stuff around the relay box to see if anything responds.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Phantaz
New User

Nov 10, 2021, 6:17 PM

Post #8 of 8 (1171 views)
Re: 2011 Kia Sorento random starting issues / relay issues Sign In

After starting the vehicle, I was able to make the engine stop by moving two of the relays, but they were two different relays and I could not duplicate it. One was the AC relay the other was the horn, either of which should cause the engine to stop. I tried to remove the relay box, but was unable to pull them out enough to check the wires within the box. I put everything back together, more out of fear that I don't know enough about what I am doing to feel comfortable disassembling the box further. Taking it to the dealership next week, as bad as I hate to do that. With electrical, I would rather not screw something up more than it already is. Will report what the issue is once I have an answer.






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