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View Full Version : Sputter black smoke and high idle


lost240soul
10-12-2008, 01:04 AM
ok so i have a 90 s13, single cam motor is all stock no mods what so ever..
but the thing is the car idles around 1100-1300 rpm,if i push the pedel a little hard it sputters and spits out a lot of black smoke (rich condition)also idles falls off to like 500 rpm but if i give gas gently it doesnt sputter or bog...

no check engine light and plugs and wires are fairly new..

any ideas let me know

fliprayzin240sx
10-12-2008, 01:49 PM
Vaccum leak...