Name that misfiring symptom cause - Now with Video of car running.
So.. The NX is able to be deemed mobile again. However, after sitting in storage for several years ( but started and run regularly), it seems the car has developed a recurring misfiring problem.
This started about a year ago and i had thought I fixed the issue by changing the plugs. The plugs that were taken out did not look fowled or in bad condition.
I run NGK Platinums.
The Distributor cap and rotor look A-OK and the coil plug as well as spark plugs have no cracks or wear signs.
The gas that has been sitting in the car has not been over 9-10 months old, and has been treated as well.
Keep in mind, here is the twilight zone aspect of the cars symptoms..
The car only misfires after It has been driven under full throttle above 4K.
I will let the car warm up, cruise for a bit etc. When i let some pressure get through the engine and let it rev only then will the symptoms occur. But only after i have gone through whatever gears in the higher RPM range. so say.. I let it get above 6K in 2nd and 3rd, then shut down to a cruise and put it in 5th.. then Bingo.. I sound like a subaru. the car will then not stop. I can then let the car sit for a couple days and it will start back up fine.
Something tells me this is more fuel system related, but I don't have much experience diagnosing these issues. I dont want to rush and do anything drastic without any pointers or ways to narrow down what could be the issue. Please help, this is the only thing keeping me from attending a local AutoX for some needed fun time with the car. Thanks to any who help!
This started about a year ago and i had thought I fixed the issue by changing the plugs. The plugs that were taken out did not look fowled or in bad condition.
I run NGK Platinums.
The Distributor cap and rotor look A-OK and the coil plug as well as spark plugs have no cracks or wear signs.
The gas that has been sitting in the car has not been over 9-10 months old, and has been treated as well.
Keep in mind, here is the twilight zone aspect of the cars symptoms..
The car only misfires after It has been driven under full throttle above 4K.
I will let the car warm up, cruise for a bit etc. When i let some pressure get through the engine and let it rev only then will the symptoms occur. But only after i have gone through whatever gears in the higher RPM range. so say.. I let it get above 6K in 2nd and 3rd, then shut down to a cruise and put it in 5th.. then Bingo.. I sound like a subaru. the car will then not stop. I can then let the car sit for a couple days and it will start back up fine.
Something tells me this is more fuel system related, but I don't have much experience diagnosing these issues. I dont want to rush and do anything drastic without any pointers or ways to narrow down what could be the issue. Please help, this is the only thing keeping me from attending a local AutoX for some needed fun time with the car. Thanks to any who help!
Last edited by JimmyNX
on 2012-04-22
at 01-01-08.