Smoking At WOT
Thread Starter
Pro
Joined: Jan 2001
Posts: 674
Likes: 0
From: Pleasant Hill,CA,USA
Smoking At WOT
My friend has been complaining that when he gets on it that his car starts to smoke.I witnessed it the other day while driving with him on the freeway he was doing about 60 and nailed it and it started to smoke but when he let off the gas it stopped.I know that the car needs new vavle seals because it smokes at start up.Could it be the rings have gone bad?The car is an 87 with 91K
Team Owner
Joined: Mar 2001
Posts: 54,124
Likes: 30
From: Cincinnati, Oh USA
Re: Smoking At WOT (tsquare)
Sounds fairly normal to me. At WOT not all the fuel in the cylinders is burned and it goes out the exhaust. Since your were behind him, what odor in his exhaust could you detect? Oil, or gas?
Team Owner
Joined: Apr 2001
Posts: 22,267
Likes: 3
From: Dallas TX
Re: Smoking At WOT (Jays84Z51)
Yep.. that seems normal to me... When you're putting that much fuel through an engine that size... it still doesn't get burned all the way. When you're at 5500rpm, that's VERY little time for combustion to occur, and it doesn't occur all the way in most cases...
[Modified by Glock'94, 1:58 AM 9/23/2001]
[Modified by Glock'94, 1:58 AM 9/23/2001]
Melting Slicks
Joined: Apr 2000
Posts: 3,198
Likes: 2
From: Northern CA
Re: Smoking At WOT (Glock'94)
That explanation makes sense, but after you've been at WOT for a few moments, wouldn't the O2 sensors detect the fuel and compensate? I've seen many cars give a puff of black smoke when they hit the gas, but it goes away pretty quickly.
Team Owner
Joined: Apr 2001
Posts: 22,267
Likes: 3
From: Dallas TX
Re: Smoking At WOT (JasonL)
The computer goes into open mode at WOT, which means that it doesn't even care what the O2 sensors are reading.. The puff of smoke you're seeing is not the same thing.. they are probably just running rich. I assume that the cars you see this happen to are sports cars putting 300hp to the ground too ;).
[Modified by Glock'94, 11:42 AM 9/23/2001]
[Modified by Glock'94, 11:42 AM 9/23/2001]
2nd Gear
Joined: Sep 2001
Posts: 2
Likes: 0
From: Levelland TX
Re: Smoking At WOT (tsquare)
The color of the smoke should tell you. Black smoke is fuel, blue-grey is oil. A little smoke at WOT might be normal, but if it continues
throughout the WOT, it might be rings. If it smokes blue on deceleration, it is most likely valve guides.
[Modified by dgrimes, 8:12 AM 9/23/2001]
[Modified by dgrimes, 8:14 AM 9/23/2001]
throughout the WOT, it might be rings. If it smokes blue on deceleration, it is most likely valve guides.
[Modified by dgrimes, 8:12 AM 9/23/2001]
[Modified by dgrimes, 8:14 AM 9/23/2001]
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Drifting
Joined: Nov 2000
Posts: 1,722
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From: Big D Tx
Cruise-In II Veteran
Re: Smoking At WOT (Glock'94)
smoking at WOT isnt normal. ive have two tuned port cars in my garage, and niether of them smoke at WOT. id be looking to see how the piston rings are. either that or hes way too rich.
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Re: Smoking At WOT (88L98)
Smoking at WOT only, indicates the air/fuel mixture is too rich. I say "too rich" because a little rich at WOT is okay as a safety factor, but to the point of seeing actual smoke is too far.
At the instant you nail the pedal, you may see a slight amount of smoke due to the enrichement, but it should immediately clear and remain clear as long as you keep the loud pedal down.
Watch how clean the winning Winston Cup/NASCAR and Pro Stock cars run. Smoking, in all it's different forms, is bad news.
Hope this helps.
Jake
At the instant you nail the pedal, you may see a slight amount of smoke due to the enrichement, but it should immediately clear and remain clear as long as you keep the loud pedal down.
Watch how clean the winning Winston Cup/NASCAR and Pro Stock cars run. Smoking, in all it's different forms, is bad news.
Hope this helps.
Jake