2004 Hyundai Sonata Questions

All 2004 Hyundai Sonata Questions

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could it be a weak coil. The copil is on cyl 4 but I think it serves cyl 2 also.
When I climb a hill, I am huffing and puffing. When I merge onto a freeway, I cannot excler fast enough.
It passed the safety inspection with no problems, but the mechanics are stumped on why only 3 of the 5 tests are "showing up" for the Missouri emission test. Two of the tests consistenly won't even register so they ...
The airbag light stays on all the time.
This problem is driving me nuts, i have replaced the tires and had them balanced. i think the problem is in the engine, while drining at highway speeds i shifted into nutral and the shaking stopped, shift back to driv...
bought a speed sensor but don't know where to put it
and also the light bulb on the turn signal for the windshield wipers.you can not see any of them at night. I hope you know what I am talking about.Thank you Debbie
this happens every fill up, it also has a surge or it feels like a momentary power loss when idlig or accelerating. just had timing belt replaced & tune up. these didn't help any. also cleaned out gas tank vent lines
After taking the battery cables out, the air bag light was on. So, it never turned off again. Any tips?
how much to change the alternator and belt on a 2004 hyundai sonata v6. please just tell me what labor should be
DECEMBER OF LAST YEAR I KNOTICED MY RPM NEEDLE STARTING TO DROP WITHOUT ME ACCELERATING,THEN MY CHECK ENGINE LIGHT WENT ON,THEN IT ALL CHANGED. ONCE THAT NEEDLE WOULD DROP TO 0 MY CAR WOULD SHAKE REALLY BAD AND COMPLE...