1999 model, it cuts out once per trip, always at low speed pressing on the accelerator, I hear the electrics go off and oil+battery light on dash just like when starting, it sometimes comes back to life after a second while coasting but if not then it takes a few minutes to restart when stationary.
I've replaced spark plugs but theres no change. There was a transmission fluid leak at the same time this started happening but that was fixed and the cut out problem still happens. TIA
I had this happen to mine twice. Once when I first bought the car in 2002 and after several trips to the dealer they replaced the crank shaft position sensor. Earlier this year I had it happen again and I replaced the same thing and it solved my problem.
I have the same problem with my 95 hyundai sonta, and I asked my mechanic what could be the cause and he said it could be the air intake. You will see a group of i think about 10 little hoses all together and to check to see if there is an air leak in those, it could be that and be solved with a few dollars spent on some new hoses, that you could do yourself.
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this being a new car probably with very low mileage the noise you hear is more than likely the exhaust cooling off after getting hot from driving.it will stop doing this after a while when it gets driven more.some cars do this as it gets broke in from driving.
I just bought a 1999 Sonata "as is" and had the same problem bringing it home. The previous owner said it was a fuel filter or pump problem, but I found this online regarding recalls on this model: VEHICLE DESCRIPTION: SOME SONATA VEHICLES EQUIPPED WITH 2.5 LITER V-6 ENGINES AND ALL ELANTRA MODEL VEHICLES MAY HAVE EXPERIENCED INTERMITTENT LOW-SPEED ENGINE STALLING, WHICH COULD OCCUR IF THE MAF (MASS AIR FLOW) SENSOR ELECTRICAL SIGNAL IS INTERRUPTED AS A RESULT OF ENGINE VIBRATION TRANSMITTED TO THE MAF SENSOR CONNECTOR WIRING HARNESS. You might want to ask your mechanic to check this out.
I have the same problem with my elantra 1999 you should check oxygen sensor or replace it but before that cut the yellow from the oxygen sensor if the problem gone then replace it else i dont know but try
I have the same problem..but mine has a hard time getting up to 55 ..it also does the hard shift thing and will not excelerate going up any kind of hill.I've already replaced the input..output speed censor's and had a tune up...it has about 116,500 miles on it and i dont know if its the transmission causing the problems.
BEST SOLUTION: Take/Tow your vehicle to an authorized Hyundai dealership and pay the diagnostic fee... they will tell you exactly what the problem is and the cost of parts/labor to fix it... at least this way you'll know what the problem is and what's required to fix it.
I have a 2002 Hyundai Sonata and I had the same problem. But mine would always shift into 3rd gear and STAY there until I turned the car off. I took it to a Hyundai dealer and he had to rewire a speed sensor on top of the transmission. Apparently a little animal got up in that tight little spot and gnawed on my sensor wires. The car has run fine since. To make a long story short, it might be your speed sensor on your transmission.
tried testing the igniter also i would look into the injector, that will cause a single cylinder misfire and probably is your problem?misfires are not noticeable at higher speeds, which im sure you know but i would go that route, could have a pinched injector or a stuck one. one easy way to test is swap 3rd injector with another and see if that one starts misfiring instead, another rought is to get a cheap auto stethoscope and put it to each injector to hear if its opening and closing, compare with others. good luck.