Need some Techs with expertise gs300
04-01-08, 11:12 PM
#1
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Need some Techs with expertise gs300
Hi everybody, new to the site and let me get to my problem...
Ok, check engine light came on and so did VSC light, I feel lost of power, hesitation from the engine. 1st. scan code. P0304 - misfire cylinder #4, inspect spark plugs - looks ok I replace it 10k ago. Ohm test spark plug wires - there is continuity. Ohm test Coil pack and all thee of them gave the same reading so I'm guessing they are still good, just be on the safe side I swap the coil pack from #1 to #4. Install everything back together, clear code and fire it up and let it run for a while. Check engine came back on with the same code p0304. Ok, now I test for power to the fuel injector. There is pulse (flashing) from the injector harness connectors with noid light kit, I can hear injector pulses with a stethoscope. Just to make sure that injector #4 is not clog I swap #1 injector to #4 injector....Install everything back together again and clear code and fire it up and let it run a while again. And the P0304 and VSC light up again!! Now, this is where I am stuck...did I miss anything??
I have fuel, spark....the only thing I have not done is compression test but I don't think it is likely to be the problem. Let me know if you have any idea, I have been playing with this car for 2 days and running out of ideas. Thank you for reading.
Ok, check engine light came on and so did VSC light, I feel lost of power, hesitation from the engine. 1st. scan code. P0304 - misfire cylinder #4, inspect spark plugs - looks ok I replace it 10k ago. Ohm test spark plug wires - there is continuity. Ohm test Coil pack and all thee of them gave the same reading so I'm guessing they are still good, just be on the safe side I swap the coil pack from #1 to #4. Install everything back together, clear code and fire it up and let it run for a while. Check engine came back on with the same code p0304. Ok, now I test for power to the fuel injector. There is pulse (flashing) from the injector harness connectors with noid light kit, I can hear injector pulses with a stethoscope. Just to make sure that injector #4 is not clog I swap #1 injector to #4 injector....Install everything back together again and clear code and fire it up and let it run a while again. And the P0304 and VSC light up again!! Now, this is where I am stuck...did I miss anything??
I have fuel, spark....the only thing I have not done is compression test but I don't think it is likely to be the problem. Let me know if you have any idea, I have been playing with this car for 2 days and running out of ideas. Thank you for reading.
04-02-08, 06:01 AM
#2
Welcome to CL ... You are definitely posting your problem in the wrong section, this is the classifieds where people come to buy or sell parts ... I'm sure a mod will soon move your post to the right section so you can get the answers you need, good luck 
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