# black smoke **URL:** \ **Category:** SON240sx Automotive\ **Created:** [October 20, 2006, 9:04pm UTC](https://forums.speedlife.net/t/black-smoke/101011 "2006-10-20T21:04:21Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![FUNGC](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/fungc/32/5539_2.png) [@FUNGC](https://forums.speedlife.net/u/FUNGC)\ **Post date:** [October 20, 2006, 9:04pm UTC](https://forums.speedlife.net/t/black-smoke/101011/1 "2006-10-20T21:04:21Z")
ok so i put another engine in cause the other one was shaking badly, and this engine seems to be alot better. it doesnt shake as much, just a little. i was told that this engine is in perfect running condition. ive checked the spark plugs before i started the new engine up and it looks nothing like the new sparkplugs i put in my old engine. my old engine’s spark plug was pure black, and this one is silvery white. not sure what these mean. but right now im still having a problem with alot of black smoke when i rev the car. and still shakes a bit. i was wondering what black smoke means, and it sorta smells like gas. it puts out tons of carbon. and i also wondering what might be the problem, cause its almost the same situation with my old engine, just that this one is alot better. ---
**Author:** ![B\_Hebert](https://avatars.discourse-cdn.com/v4/letter/b/b9e5f3/32.png) [@B\_Hebert](https://forums.speedlife.net/u/B_Hebert)\ **Post date:** [October 20, 2006, 9:16pm UTC](https://forums.speedlife.net/t/black-smoke/101011/2 "2006-10-20T21:16:59Z")
its rich for some reason is my opinion… Wierd being a stock motor. ---
**Author:** ![FUNGC](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/fungc/32/5539_2.png) [@FUNGC](https://forums.speedlife.net/u/FUNGC)\ **Post date:** [October 20, 2006, 9:34pm UTC](https://forums.speedlife.net/t/black-smoke/101011/3 "2006-10-20T21:34:48Z")
yea im thinking that its rich too from the beginning. but i dont know what has caused this, cause this car is entirely stock. can it be my shitty exhaust system? ---
**Author:** ![B\_Hebert](https://avatars.discourse-cdn.com/v4/letter/b/b9e5f3/32.png) [@B\_Hebert](https://forums.speedlife.net/u/B_Hebert)\ **Post date:** [October 20, 2006, 9:50pm UTC](https://forums.speedlife.net/t/black-smoke/101011/4 "2006-10-20T21:50:30Z")
well i got a 3" catback and i notice that i smell the richness more but i dont see it out the tailpipe. Might just be me but it goes through way more gas than it used to. ---
**Author:** ![G-E](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/g-e/32/5546_2.png) [@G-E](https://forums.speedlife.net/u/G-E)\ **Post date:** [October 21, 2006, 12:32am UTC](https://forums.speedlife.net/t/black-smoke/101011/5 "2006-10-21T00:32:22Z")
> and this one is silvery white that one must be lean… I would have your injectors cleaned and see what happens, I suspect you have one or more leaky injectors that is causing the o2 sensor to lean you out screwing with the mixture on the other cylinders ---
**Author:** ![alesserfate](https://avatars.discourse-cdn.com/v4/letter/a/f6c823/32.png) [@alesserfate](https://forums.speedlife.net/u/alesserfate)\ **Post date:** [October 21, 2006, 12:50am UTC](https://forums.speedlife.net/t/black-smoke/101011/6 "2006-10-21T00:50:20Z")
and check your mafs ---
**Author:** ![FUNGC](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/fungc/32/5539_2.png) [@FUNGC](https://forums.speedlife.net/u/FUNGC)\ **Post date:** [October 21, 2006, 9:05am UTC](https://forums.speedlife.net/t/black-smoke/101011/7 "2006-10-21T09:05:16Z")
> [@G-E](#): > > > and this one is silvery white > > that one must be lean… I would have your injectors cleaned and see what happens, I suspect you have one or more leaky injectors that is causing the o2 sensor to lean you out screwing with the mixture on the other cylinders it was silvery white back then, but now it is black, and puts out tons of black smoke, like the other engine. so i suspect that the engine itself is fine. and im guessing its probably the mafs, ecu or clogged cat maybe? anymore suggestions ---
**Author:** ![FUNGC](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/fungc/32/5539_2.png) [@FUNGC](https://forums.speedlife.net/u/FUNGC)\ **Post date:** [October 24, 2006, 3:27pm UTC](https://forums.speedlife.net/t/black-smoke/101011/8 "2006-10-24T15:27:56Z")
ok now i cleaned tha mafs and everything and i think its messed. it runs even \*\*\*\*tier than before, and when i pull off my mafs it idles the way it should. nice and smooth. now once i put back my mafs, it just bogs down and then shakes a hell lot. does this mean that my mafs is screwed? ---
**Author:** ![Flip240](https://avatars.discourse-cdn.com/v4/letter/f/b5e925/32.png) [@Flip240](https://forums.speedlife.net/u/Flip240)\ **Post date:** [October 24, 2006, 5:56pm UTC](https://forums.speedlife.net/t/black-smoke/101011/9 "2006-10-24T17:56:51Z")
check for ne exhaust manifold leaks. a leak in the exhaust mani will cause bad o2 readings upstream thus dumping more fuel! ---
**Author:** ![FUNGC](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/fungc/32/5539_2.png) [@FUNGC](https://forums.speedlife.net/u/FUNGC)\ **Post date:** [October 24, 2006, 5:57pm UTC](https://forums.speedlife.net/t/black-smoke/101011/10 "2006-10-24T17:57:45Z")
leaks were all fixed during tha second swap. ---
**Author:** ![Fitzy](https://avatars.discourse-cdn.com/v4/letter/f/7ba0ec/32.png) [@Fitzy](https://forums.speedlife.net/u/Fitzy)\ **Post date:** [October 25, 2006, 11:57am UTC](https://forums.speedlife.net/t/black-smoke/101011/11 "2006-10-25T11:57:59Z")
black = carbon = running rich white = trouble = lean OR coolant (head gasket) for running rich on a stock motor it could be your MAFS or you O2 sensor. ---
**Author:** ![FUNGC](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/fungc/32/5539_2.png) [@FUNGC](https://forums.speedlife.net/u/FUNGC)\ **Post date:** [October 28, 2006, 9:17pm UTC](https://forums.speedlife.net/t/black-smoke/101011/12 "2006-10-28T21:17:34Z")
O2 sensor is pretty new, and i just tried my friend’s mafs today, didnt make a difference. not sure if both of ours worth faulty though, since we dont really have a working KADE to test it with.