Sometimes the car starts like normal, drives fine. Turn car off then try to restart it cranks but will not start. After several minutes of trying it starts like normal. Prior to this starting gased the car up and it ran very rough not allowing me to push the tech past 3 thousand rpm. and trouble starting. Any ideas how to fix this car has 234,000km when it runs it runs great.
Filling up the gas tank can stir up the fuel fumes. You may need to check your evap system? I can't rule out bad gas?
When the problem is ongoing, have a helper crank it while you check for spark at the plugs. If spark everywhere, use a gage and check proper fuel pressure and fuel injector pulse. With intermittent issues, need to test when problem is ongoing. How long since a tune-up? Any applicable trouble codes?
Problems at higher rpms, the basics, you check for a blockage of some kind, fuel--air--exhaust.
SOURCE: 2001 hyundai sonata 2.4 dohc, cylinder 3 misfire code
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.
SOURCE: 2000 Elantra Overheating
First when vehicle is cold like in the morning check and make sure that the vehicle has enough coolant/ antifreeze in radiator and reservoir. If coolant is need use a 50/50 mixture of water and antifreeze. You will need some time to do this let car run at idle until the temp guage is in the middle NOT+ normal operating temperature. At this point if the thermostat should be in the open position. Let vehicle run and check to make sure that radiator fan comes on. This should come on when guage is about midway/half way. If temperature rises above half going to h/hot and fan doesn't come on, you either have a BAD FAN BAD FAN SWITCH BAD FAN RELAY OR BLOWN FAN SWITCH FUSE. You will need to check all of the following I will help if its needed. If fan comes on and doesn't go off and vehicle continues to get hot even with fan running. Feel radiator hoses and see if the lower radiator hose is cool/cold. If it is you have thermostat that stuck closed. Replace thermostat and fix problem. If all the above is good and vehicle continues to over heat. THE BAD NEW IS THAT YOU MAY HAVE A BLOWN HEAD GASKET /CRACKED HEAD /BROKEN WATER JACKET. Basically you will need a HEAD JOB at least a head gasket. ONe tell tail sign of this is oil looking like milkshake/chocolate milk-a creamish while residue in oil or antifreeze. Contact if you need hel0p. Good Luck and thanks for using FIX YA
SOURCE: After filling up my 2004 Hyundai Sonata, it has
Try some dry gas, there maybe water in the tank or crud being kicked up,
Next time fill it up when it gets to a 1/2 tank to test..
if the problem remains it could be a evap or pressure problem..
How old is the fuel filter?
SOURCE: 2004 Hyundai Sonata won't start or starts hard in
try replacing the plug wires,it sounds like they are bad,
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