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strykr · 09-30-2013, 08:38 PM

Hi everyone,

I recently purchased a 1990 240SX S13 with a K24E SOHC motor,
The car when i purchased it ran fine and had 143,xxx miles on the motor and transmission.

I am now at 148,xxx miles and the car is messing up on me and it seems bad but i cannot figure what on earth the problem is...

The car feels like its misfiring, i can't seem to figure out what cylinder is doing it but it feels like im running on 3 cylinders, here's the trippy part, the car will run fine and in the middle of driving just start running on 3 cylinders, sometimes it will run on 3 cylinders and then randomly start running fine and idling fine.

ive attached a picture of something that i wiggled the other day trying to figure out what was wrong and when i wiggled this little gizmo i noticed my idle started moving up and down. is this thing the knock sensor ?

I'm not sure whats the problem with the car, even though it feels like its running on 3 cylinders, it's not throwing any codes... -.-

any ideas ? what should i do ? its not my plugs, i recently replaced them all.

my stepdad whose also on this forum and has been a 240 enthusiast for quite some time also cant seem to figure it out ? could it be a timing thing ? he says probably not because the car works and then doesnt fire properly, i also have installed new spark plug wires as well.

any ideas ? please help this is my daily driver and i just want to get it back up and running the way it was when i got it ... thanks guys.

09-30-2013, 08:38 PM	#1
strykr Join Date: Sep 2013 Location: los angeles Age: 39 Posts: 4 Trader Rating: (0)	S13 K24E Problems Hi everyone, I recently purchased a 1990 240SX S13 with a K24E SOHC motor, The car when i purchased it ran fine and had 143,xxx miles on the motor and transmission. I am now at 148,xxx miles and the car is messing up on me and it seems bad but i cannot figure what on earth the problem is... The car feels like its misfiring, i can't seem to figure out what cylinder is doing it but it feels like im running on 3 cylinders, here's the trippy part, the car will run fine and in the middle of driving just start running on 3 cylinders, sometimes it will run on 3 cylinders and then randomly start running fine and idling fine. ive attached a picture of something that i wiggled the other day trying to figure out what was wrong and when i wiggled this little gizmo i noticed my idle started moving up and down. is this thing the knock sensor ? I'm not sure whats the problem with the car, even though it feels like its running on 3 cylinders, it's not throwing any codes... -.- any ideas ? what should i do ? its not my plugs, i recently replaced them all. my stepdad whose also on this forum and has been a 240 enthusiast for quite some time also cant seem to figure it out ? could it be a timing thing ? he says probably not because the car works and then doesnt fire properly, i also have installed new spark plug wires as well. any ideas ? please help this is my daily driver and i just want to get it back up and running the way it was when i got it ... thanks guys.