It's called a "dead" cylinder and you did right by replacing the cam sensor. Still does it though? Do a ohm meter test on the injectors to find if one is bad. The one that shows the lowest reading compared to the rest is the bad one. Code being P0304 means it's #4 cylinder dead. IF that injector shows a low reading, replace it or have it cleaned professionally. If the test shows all injectors reading the same, 16.5 or so, none are bad. do a compression test on all cylinders, if you find #4 cylinder is on the low side with a compression test, you have a bad exhaust valve and must give it attention.
SOURCE: Car reving up and down on its own 3 to 4 times, then sputtering and dying?
The previous solution to check the idle air contol is in the correct area but needs some clarification.
The idle control is accomplished by two parts: Throttle position sensor ( $35 at Autozone) and idle contol valve approx $190. I replaced the throttle position sensor about a week ago and it runs perfect
to date but am a skeptic after almost two years of dealer incompetance. I researched all the sensors and failure symptoms on the internet and the throttle position sensor failure symptoms matched mine
exactly. See http://wiki.seloc.org/a/Throttle _Position_Sensor
SOURCE: car dies seconds after starting it, everytime.
Hi,I would thnk you have an immobilizer fault/fuel pump/fuel pump relay problem.If you have a spare key try it.
SOURCE: 2001 Elantra stall, loss of power. Driving at
I am having the exact same problem with my 2001 Hyundai Elantra. I was told that the engine code that comes up when the sensor is on is called "Absolute Pressure In The Manifold". I was told by a "Hyundai Specialist" that when that code comes up it usually means that the seal on the manifold is Fuct. When my mechanic checked that out for me he had noticed that my manifold had 4 cracks in it(can varify cause he showed me). He replaced the manifold and gasket. The car ran fine for about 2-3 days and since then the problem has since come back and my check engine light will no longer go on/off it only stays on. Because of the check engine light always staying on I have noticed that on many occasions my car will hiccup many times in a row. The only way to stop the hiccup I have noticed is to take my foot right of the gas for approx. 2-3 sec then car will continue without hiccup(till it happends all over again). All in all I have been having this problem now for approx. 1 year and if there is somehow someway it could be repaired I would appretiate it.
SOURCE: STARTING PROBLEM!! Have 2003 Hyundai Tiburon GT
try to get a wiring diagram it sounds like you have a rubbed thru or corroded wire in the circuit. haynes manual at autozone $20.00. Some local larger libraries have the wiring books also.
SOURCE: 2003 Hyundai Sonata with 4
P0301 - Cylinder 1 Misfire Detected.
Possible Causes:
- Improper spark plug at cylinder #1
- Insufficient compression at cylinder #1
- Incorrect fuel pressure
- The injector circuit is open or shorted at cylinder #1
- Fuel injector #1 may be faulty
- Intake air leak at cylinder
Possible Solutions:
- Perform Injector Service
- Replaced Spark Plug #1
- Replaced Injector #1
- Replaced Ignition Coil #1
Being you have a heavy gas smell I would look into the injectors. If injector #1 is over producing it can cause a misfire. Test your compression and fuel pressure.
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