NA Motor Discussions regarding N/A KA24E, KA24DE, and SR20DE

White Smoke, car idles like sh*t

Old 09-03-2008, 09:04 PM
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White Smoke, car idles like sh*t

please someone help, i got a 90' 240sx w/ a SOHC ( ka24e ). I replaced my fuel filter and now the car runs like crap. i checked it, no leaks. I dont think the fuel filter has anything to do with it, it might have just been a coincidence.

What happens is the car starts up and then idles real low, almost dying. After about a minute or so, the rpms start to jump all the way to like 2k and then back then, from then on the car just jumps all the way to 2k+ and all the way down to almost dying.

i thought it was a injector leak, so i replaced the o-rings, still runs like crap. Also there is white smoke coming from the back of the motor near the firewall. I have no idea any more, if anyone has any idea what it might be, or any input please let me know asap. i need this car running.

- also the collant level has gone down, but i dont know if it has anything to do with me cracking the overflow res. recently. ( dont know if that has anything to do at all, just putting that in there. )
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Old 09-04-2008, 05:08 PM
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sounds like you have a blown head gasket.
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Old 09-04-2008, 09:14 PM
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damm, hopefully not, none of the for sure signs yet. no milky stuff anywhere
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Old 09-04-2008, 09:34 PM
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check the oil for water
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