HFC smell? - hard acceleration

elmz · 10-18-2011, 02:32 PM

If you haven't already, get under the car and make sure all the bolts are tight.

Mandingo · 10-18-2011, 04:30 PM

Update:

Thanks for the suggestions guys. I wish there was a bag stuck to the exhaust. That would have been an easy one.

I felt around all the flanges with the engine running and listened with a 2 foot section of hose (shadetree stethoscope) but couldn't find a leak.

I'm going to get someone to hold the exhaust tips closed briefly (with leather gloves on and some rags) to see if that makes a leak more apparent.

I retightened the bolts about 1500 miles ago as a precaution. They're still very tight.

It smells like fired gunpowder mixed with an unpleasantly intense new-car-smell. Sounds crazy I know but thats the best description I've come up with. I'm taking it to another dealer next week but would rather figure it out myself if possible.

Could my clutch be slipping even when accelerating in one gear all the way to redline then back down? It would have to be a defect since I only have 6200 miles on the car. Clutch fluid is 1/3 below the high mark, never raced.

B&W_Evader · 10-18-2011, 05:53 PM

How to check for clutch slip...

Take your car on the highway, no need to speed, in sixth, push in the clutch and get you car up to about 6k RPM, engage the clutch slowly while you push the accellerator down. Get it floored before you fully engage the clutch fully. The RPMs should drop down immediately when the clutch is fully released. Easy to tell if the clutch is starting to go out this way since you can get full torque into it without having too much speed change during the test. Do it quickly, 1/2-1 sec on the clutch engagement cause you don't want to burn it if it's still good. RPMs will come down gently if your clutch is near end of life.

Pelican170 · 09-14-2012, 08:15 AM

Just curious if you ever figured this out? i know the thread is old...

Just recently i feel like im having the same issue. Car drives fine but notice a smell on hard acceleration.

Just curious..

Mandingo · 09-15-2012, 02:50 AM

I still get the smell, but it isn't as bad.

Can you describe the smell? Mine isn't like anything I've encountered on a car before. Its almost like gunpowder.

Pelican170 · 09-17-2012, 08:30 AM

Quote:

Originally Posted by Mandingo

I still get the smell, but it isn't as bad.

Can you describe the smell? Mine isn't like anything I've encountered on a car before. Its almost like gunpowder.

Mine really just smells like exhaust for the most part. Im taking it to the dealer to get the exhaust tightened up just to be sure...

10-18-2011, 04:30 PM	#2 (permalink)
Mandingo Track Member Join Date: Nov 2010 Location: Dallas Posts: 625 Drives: '10 370z 6spd Rep Power: 3371	Update: Thanks for the suggestions guys. I wish there was a bag stuck to the exhaust. That would have been an easy one. I felt around all the flanges with the engine running and listened with a 2 foot section of hose (shadetree stethoscope) but couldn't find a leak. I'm going to get someone to hold the exhaust tips closed briefly (with leather gloves on and some rags) to see if that makes a leak more apparent. I retightened the bolts about 1500 miles ago as a precaution. They're still very tight. It smells like fired gunpowder mixed with an unpleasantly intense new-car-smell. Sounds crazy I know but thats the best description I've come up with. I'm taking it to another dealer next week but would rather figure it out myself if possible. Could my clutch be slipping even when accelerating in one gear all the way to redline then back down? It would have to be a defect since I only have 6200 miles on the car. Clutch fluid is 1/3 below the high mark, never raced. DEpointfive0 likes this. __________________ some mods

09-14-2012, 08:15 AM	#4 (permalink)
Pelican170 Track Member Join Date: Jul 2010 Location: Sandy Hook, CT Posts: 972 Drives: Nissan 370z Nismo Rep Power: 16	Just curious if you ever figured this out? i know the thread is old... Just recently i feel like im having the same issue. Car drives fine but notice a smell on hard acceleration. Just curious.. __________________ Fast Intentions CF Exhaust - Fast Intentions HFC's - HPS Tubes w/ AFE Dry Flow Filter's

09-15-2012, 02:50 AM	#5 (permalink)
Mandingo Track Member Join Date: Nov 2010 Location: Dallas Posts: 625 Drives: '10 370z 6spd Rep Power: 3371	I still get the smell, but it isn't as bad. Can you describe the smell? Mine isn't like anything I've encountered on a car before. Its almost like gunpowder. __________________ some mods

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10-18-2011, 02:32 PM	#1 (permalink)
elmz Track Member Join Date: Feb 2009 Location: San Diego, CA Posts: 674 Drives: 2014 Porsche Boxster Rep Power: 18	If you haven't already, get under the car and make sure all the bolts are tight.

10-18-2011, 05:53 PM	#3 (permalink)
B&W_Evader Track Member Join Date: Aug 2011 Location: CA Posts: 972 Drives: slower than before Rep Power: 387	How to check for clutch slip... Take your car on the highway, no need to speed, in sixth, push in the clutch and get you car up to about 6k RPM, engage the clutch slowly while you push the accellerator down. Get it floored before you fully engage the clutch fully. The RPMs should drop down immediately when the clutch is fully released. Easy to tell if the clutch is starting to go out this way since you can get full torque into it without having too much speed change during the test. Do it quickly, 1/2-1 sec on the clutch engagement cause you don't want to burn it if it's still good. RPMs will come down gently if your clutch is near end of life.