black smoke on start up
06-02-2006, 12:05 PM
#2
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Join Date: Aug 2005
Posts: 27
That normally means that your car is burning oil in the cylinders (aka bad). Check the seals on your valves and pistons for cracks or tears if there are any cracks or tears then get them replaced ASAP. The trouble starting could be caused by fouled spark plugs or a faulty starter. My guess is the spark plugs are getting fouled due to the oil getting into the cylinders
06-02-2006, 12:09 PM
#3
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Join Date: May 2004
Location: Placentia CA, Socal
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spark plugs looked ok, but i replaced them already.
i changes my clutch, and i just read from another post the it could be a crank sensor on the tranny. so im going to check all that out too.
anyone else got any other ideas?
from what i understood, white smoke is oil, black smoke is fuel, and a light blue smoke is coolant.
i could be wrong though.
i changes my clutch, and i just read from another post the it could be a crank sensor on the tranny. so im going to check all that out too.
anyone else got any other ideas?
from what i understood, white smoke is oil, black smoke is fuel, and a light blue smoke is coolant.
i could be wrong though.
06-02-2006, 12:49 PM
#4
Senior Member
Join Date: May 2006
Location: South Denver Area(ish)
Posts: 393
Get new valve guides, new valves, and possibly get new oil controll rings on your pistons 
Also check that the valve springs are tight, they will probably need a washer added to them soon.
Sounds like a good time to rebuild your engine if you wana...
Also check that the valve springs are tight, they will probably need a washer added to them soon.Sounds like a good time to rebuild your engine if you wana...
06-02-2006, 01:08 PM
#6
@ some of the suggestions in this thread. Your car isn't burning oil since oil doesn't produce black smoke, as you already know. Seems like excessive fuel is entering the motor at startup. Maybe the injector o-rings are bad. Any codes?
06-02-2006, 03:52 PM
#9
Originally Posted by z0dE
That normally means that your car is burning oil in the cylinders (aka bad). Check the seals on your valves and pistons for cracks or tears if there are any cracks or tears then get them replaced ASAP. The trouble starting could be caused by fouled spark plugs or a faulty starter. My guess is the spark plugs are getting fouled due to the oil getting into the cylinders
06-02-2006, 05:15 PM
#10
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Join Date: Mar 2004
Posts: 37
hmm
blue? black smoke? and why do u guys suggest he change his piston rings, valves and other things as if theyre easily done.
anywho.....valve guide seals.....rubbery.....when the car is cold they allow engine from the heads to leak down into the combustion chamber....as the engine gets warmer the rubber seals expand enough to seal up the gap...therefore u dont get any smoke when ur car is warm....
oil control rings on the pistons could also screw you over in the same way.....i dont know how u would distinguish between the two but i think that if it was the oil rings on the pistons then you could be burning oil all the time..
for the meantime you can try some additive ...Rislone or even Seafoam can help firm up those seals a bit.
anywho.....valve guide seals.....rubbery.....when the car is cold they allow engine from the heads to leak down into the combustion chamber....as the engine gets warmer the rubber seals expand enough to seal up the gap...therefore u dont get any smoke when ur car is warm....
oil control rings on the pistons could also screw you over in the same way.....i dont know how u would distinguish between the two but i think that if it was the oil rings on the pistons then you could be burning oil all the time..
for the meantime you can try some additive ...Rislone or even Seafoam can help firm up those seals a bit.
06-02-2006, 05:47 PM
#11
Originally Posted by drvefastho
and why do u guys suggest he change his piston rings, valves and other things as if theyre easily done.
06-02-2006, 06:23 PM
#14
Originally Posted by JSutter
Black is extra fuel being burned AKA rich. All OBD2 cars run rich when cold.
06-02-2006, 07:06 PM
#15
Originally Posted by risingmist
spark plugs looked ok, but i replaced them already.
i changes my clutch, and i just read from another post the it could be a crank sensor on the tranny. so im going to check all that out too.
anyone else got any other ideas?
from what i understood, white smoke is oil, black smoke is fuel, and a light blue smoke is coolant.
i could be wrong though.
i changes my clutch, and i just read from another post the it could be a crank sensor on the tranny. so im going to check all that out too.
anyone else got any other ideas?
from what i understood, white smoke is oil, black smoke is fuel, and a light blue smoke is coolant.
i could be wrong though.
LOOK BELOW!
06-03-2006, 06:43 AM
#17
schemes on chicks in his max.
Join Date: Aug 2005
Posts: 208
your car is running rich. and you have excessive gas going into your engine....if your not the 1st owner i would def check the fuel pump fuse because some people are cheap to the point where instead of getting new fuses they connect the 2 prongs together with aluminum foil(keeps the fuel pump running even after shutoff believe it or not). or like someone said before you can definitely have bad injector orings
06-03-2006, 06:56 AM
#18
Wow. . . from black smoke suggestions were make for valves and valve guide!
You are burning off excessive fuel. If your started is dragging and takes a while to catch and start the engine (let say 6 cranks later) fuel is collecting in there, and finally when the car starts its going to burn off all that fuel shooting out the black smooke in the back.
Our cars naturally run rich at start up in order to get the car up to proper working temperature. and the idle settles down and the car warms up the A/F mixture leans out.
You are burning off excessive fuel. If your started is dragging and takes a while to catch and start the engine (let say 6 cranks later) fuel is collecting in there, and finally when the car starts its going to burn off all that fuel shooting out the black smooke in the back.
Originally Posted by MaximaInCT203
your car is running rich. and you have excessive gas going into your engine....if your not the 1st owner i would def check the fuel pump fuse because some people are cheap to the point where instead of getting new fuses they connect the 2 prongs together with aluminum foil(keeps the fuel pump running even after shutoff believe it or not). or like someone said before you can definitely have bad injector orings
06-03-2006, 11:13 AM
#20
He had this happen right after a clutch install. This is definitley a grounding issue. I would bet my right nut. If I am wrong, may I be forced up against a tile wall and violated 
06-04-2006, 08:36 AM
#21
I think the guys advocating excessive fuel have it right. That raises the question of whether you have fuel collecting (i.e., dripping) while the engine is shut down (e.g., overnight), or the engine is getting excessive fuel being introduced when you try to start it (bad signal to/from the ECU or a bad injector).
In order to get an idea of which of these areas to troubleshoot further, here's what I'd try: after starting the engine and it's had 10-15 seconds to burn off (or blow out) the excessive fuel, shut the engine off. Wait 30 seconds or so and restart the engine to see if you get that black puff again. If not, I'd suspect that maybe one of the injectors was somehow allowing fuel to get into the port and pool while the engine was off for a long period.
In order to get an idea of which of these areas to troubleshoot further, here's what I'd try: after starting the engine and it's had 10-15 seconds to burn off (or blow out) the excessive fuel, shut the engine off. Wait 30 seconds or so and restart the engine to see if you get that black puff again. If not, I'd suspect that maybe one of the injectors was somehow allowing fuel to get into the port and pool while the engine was off for a long period.
06-09-2006, 01:38 PM
#24
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