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Engine noise
It seems like I have more exhaust noise in the engine bay, and a slight decrease in power at times(which I think is my fuel pump). But when I open my hood and have a listen, there seems to be more of an exhaust noise coming from the engine. What would be some things that would cause that??
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08-07-2014, 04:00 AM
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Registered User
Join Date: May 2012
Posts: 383
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Loose or broken exhaust header studs or flange bolts.
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'78 924 "NA" '87 944 "S" '93 968 "SC" |
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08-07-2014, 05:03 AM
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Proprietoristicly Refined
Join Date: Jul 2001
Location: ~Carefree Highway~
Posts: 5,833
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Cracked exhaust header 1-4.
Look up from under car where the 2 pipes join for cracks. J_AZ
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1988 924S, 85,750K ..+ 1987 924S, 154K DD (+15K est. bad odo) |
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08-07-2014, 06:00 AM
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Registered
Join Date: Jun 2014
Location: Lake County, FL
Posts: 820
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The first thing I would check would be the o2 sensor, it's fairly common for them to be cross-threaded, which causes them to rattle loose over time. It sounds like a nasty header leak.
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08-07-2014, 06:37 AM
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944 addict
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Put a piece of Kleenex on the end of a stick and move it around the exhaust system and manifold. Look for the Kleenex to flutter in the area of a leak, while the engine is running. I saw this cool trick on Wheeler Dealers. It actually works.
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3 944's, 2 Boxsters and one Caman S, and now one 951 turbo. Really miss the Cayman. Some people try to turn back their "odometers." Not me. I want people to know 'why' I look this way. I've traveled a long way and some of the roads weren't paved. |
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08-07-2014, 07:05 AM
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Thanks for the tips!!
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08-07-2014, 03:41 PM
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Registered
Join Date: Apr 2008
Location: Cincinnati, Ohio
Posts: 378
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Do let us know what your results are.
I am in learning mode 
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86 944na Alive and Rollin 
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08-08-2014, 04:41 AM
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944s
Porsche 944 NA
1986 Porsche 951
