Burning smell under hard acceleration
03-12-2011, 12:19 PM
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Burning smell under hard acceleration
Help. Oil levels fine, oil pressure fine, all fluids fine. Nothing on the floor of the garage? Temps run fine, but each time I get on the gas a bit, I get a burning smell coming out of the AC vents. Its disconcerting. Anyone have any thoughts. All new belts and seals as well. Oh, yeah...and no clutch slippage.
Last edited by mtnspeed; 03-12-2011 at 12:46 PM.
03-12-2011, 01:34 PM
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i got that doing a top speed pass near south dakota. pretty startling smell for sure.
mine went away almost immediately, though.
mine went away almost immediately, though.
03-12-2011, 02:01 PM
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Yeah, but mine does it even when not WOT. Then, like you said, it goes away almost immediately. Other than that, she drives great with no issues?
03-12-2011, 06:09 PM
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What kind of burning smell? Rubber? Clutch? Belt? Paper? Oil?
My first guess would be serpentine belt slip. After that maybe a hose getting abraded by a belt or sprocket.
-Joel.
My first guess would be serpentine belt slip. After that maybe a hose getting abraded by a belt or sprocket.
-Joel.
03-12-2011, 06:37 PM
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That's what's weird. I can't really place it. It's not rubber, and frankly I have never had a clutch burn out on me, so....I am not sure there. I smells more engine or machine like than rubber, belts, etc. I was paying extra attention to the clutch today, but besides it getting close to the top its all good.
?????
03-12-2011, 08:38 PM
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I was thinking alternator/AC belt slip as well. Try this: Park the car and let it idle. With the A/C switch off, turn the fan to "4". Then press the A/C button. If the belt is not tensioned properly, your voltage should drop, you should get the smell, and you might hear the belt squealing.
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03-13-2011, 11:23 AM
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I"ll give that a try today
I was thinking alternator/AC belt slip as well. Try this: Park the car and let it idle. With the A/C switch off, turn the fan to "4". Then press the A/C button. If the belt is not tensioned properly, your voltage should drop, you should get the smell, and you might hear the belt squealing.
03-14-2011, 10:16 AM
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Slipping belt smells like a vacuum cleaner or sewing machine... kind of a machine smell. The 944/968 suffers a bit from poor belt wrap around the alternator so it frequently slips if not quite tight. This is usually noticed at startup, it might squeal a bit and then quiet down when it warms up.
There is a kit from 928 Motorsports that adds an idler between the alternator and AC pump that helps a bit.
-Joel.
There is a kit from 928 Motorsports that adds an idler between the alternator and AC pump that helps a bit.
-Joel.
03-14-2011, 07:20 PM
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Hmmm
No vacuum cleaner smell. Mostly like burned oil. I was considering the fact that it was a small leak getting burned off. Just seems weird that I wouldn't see anything, or smell it at any other time. I am going to try the AC recommendation just to rule it out.
