Question about 2001 Hyundai Sonata

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2001 hyundai sonata stalls at highway speeds. Had code read and code said misfire on all 4 cylinders. Why?

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Dear friend- can you be more specific with the conditions and fault codes.this sounds like your TPS sensor is instructing the ECU to cut the feul,therefore there must be another fault code.

Posted on Jul 21, 2009

  • dear friend- can you be more specific with the conditions and fault codes.this sounds like your TPS sensor is instructing the ECU to cut the feul,therefore there must be another fault code.

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Not getting spark on my 2001 sonata 4 cylinder sadan


The crank sensor control spark in this car. Check if you set any codes. Check for power at the coil. Here's a forum on this...

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Multiple cylinder misfire


There could be a couple of reasons for this. If you are getting multiple misfires then usually it has something to due with the plugs going bad. It also depends on how many miles you have on the plugs and the wires. The other problem could be with the ignition coils or the ignition module.

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Higher octane gas 93 with some good octane boost in the black can at autozone cost about 7 dollars or a bottle of 104 octane boost. Change the fuel filter. Probably only one coil pack is bad. The OBDII reader should tell you which one was a misfire.

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Could be misfire. You need to get a code reader to find out what the trouble codes are. You can then better know what to do next. Spark plugs could be the problem. They are easy to change on the four cylinder, and the V6 is a bit of a chore as the intake plenum needs to be unbolted to change the three rear plugs. Get the codes read! best of luck!

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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.

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2001 sonata V6 spark plug


For starters if your going to do 1 do all. The locations are from left to right when standing in front of the car. 1, 3, 5
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wires are 3
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Nov 03, 2008 | 2001 Hyundai Sonata

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