Question about Hyundai Elantra

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'13 Hyundai Elantra. When driven for a while & approx 1/4 tank of gas it idles rough/stalls. Starts back up but stalls until parked for a bit & rests. No check engine light & my mechanic is stumped

I did through a code once for the MAP sensor which was replaced but it is still doing it.

Posted by Anonymous on

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  • Hyundai Master
  • 5,320 Answers

Even perfect electronics have trouble making an engine run properly if the mechanical parts aren't similarly in good order and when an engine obviously isn't right but nothing obvious is wrong it is time to check the less obvious, in particular check for dribbling injector(s) and bad spray patterns and of course fuel pressures.

It is also worth carrying out a cylinder leakage test (compression test is inadequate) to ensure the intake valve seats aren't leaking.

Posted on Dec 20, 2018

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6ya6ya
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SOURCE:

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Posted on Jan 02, 2017

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  • 141 Answers

SOURCE: Engine runs rough after about ten minutes /idles really low

Just trowing some suggestions out there, but, I would check the idle air control valve (solenoid) or the throttle position sensor. If they check out then my last guess would be the map sensor or the vaccuum to the map sensor. Hope I was able to help. Best wishes.

Posted on Jan 17, 2009

csmock132
  • 4669 Answers

SOURCE: check engine light on,running rough code P0172

When I see all these codes i instantly think of two things. Vacuum leak especially intake manifold gaskets and Mass air flow sensors. Spray the engine with carb cleaner when its running and see if you get it to rev up,run rough or run different. Next unplug the MAF and drive the car, see if it runs normal.

Posted on Jun 02, 2009

  • 184 Answers

SOURCE: 2003 Hyundai Elantra GLS. Check engine light, code PO133

Did you use a aftermarket O2 sensor or a genuine Hyundai one? If it's an aftermarket one it may be bad or not as good as the OEM one. See here for more details and other potential causes: P0133

Posted on Feb 11, 2010

wyatt1582
  • 453 Answers

SOURCE: 1998 FORD CONTOUR CHECK ENGINE

sounds like EGR valve and sensor this controls idle speed when at a stop. the po171 is a burn lean or rich code need to know what bank 1 or 2. also check for a vacuum leak from one of the hoses.

Posted on Aug 07, 2010

  • 1 Answer

SOURCE: 98 jeep grand cherokee limited

98 jeep grand cherokee, starts fine but then dies and will not run, after it dies it will start right back and do the same thing, can not get it run, any help is always appreciated

Posted on May 31, 2011

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1 Answer

How do i fix a rough idle and stall?


Hi Cody:
I'd be checking all of the vacuum hoses and the PVC valve.
Also it wouldn't hurt to put some fuel conditioner like SEAFOAM through it.
My approach tends to be to make sure the basics are looked after before starting to second guess for major problems.
Cheers.

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Hello! The 2000 Hyundia line has a common fault in the design of their evaporator system; The handling of fuel fumes. If, at any time, you may have overfilled the gas tank, gas will saturate the charcoal canister. This causes small pieces of charcoal to circulate within the evaporation control system, clogging it up, not allowing the gas tank to be filled. Does your Elantra have trouble accelerating, run rough, or stall? Probably so. Take the car to someone you trust and have them flush the evaporator system with the canister removed. You will more than likely need a new canister.

Guru................saailer


I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867

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