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Registered User
Join Date: Jan 2014
Posts: 10
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slight loss of accelearation
I've owned my 02 996 for about 4 months and have noticed a loss of power. Not the usual, "I'm getting used to it'.
The car had a KICK to it above 35-6500rpm but now it's flat all the way up through the rpm range. NO, it's not a dawg but it is noticeable. Before I left on a long trip I had a code reading secondary air injector. I erased it and did a quick tune up in a bottle. Not much change. The day before leaving for return trip back came the code. Called my mechanic Son and he advised some good injector cleaner and some octane boost just to see what happens. After a few hours of driving the CAR WOKE UP!! the kick was back with a big smile on my face. Now it's back to it's lazy days again. Research has given me a few areas such as mass air, secondary air inj. I don't have a good shop manual but I believe I read that the 996 3.6 engine does have a secondary much like the old 4 barrel carbs I grew up with and it acts as if it's only running on the front two. Any ideas. thanks, tom m Ocala, FL |
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06-19-2014, 07:53 PM
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Registered
Join Date: Mar 2009
Location: New Windsor NY
Posts: 297
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I have a 02 with the 3.6 that has been rebuilt to a 3.8. I wound not take advice on a 911 from a mechanics kid. I would start with the basics.
1)Air intake. 2)fuel 3)spark If all those are fine, IE filters and plugs, coil packs, then comes the other stuff. MAF, which you would get a code for. Air injection you can hear it when its shot. Also you can loose power on the higher RMP with a bad clutch, like slipping. I would take it to a good Porsche mechanic. He will figure it out. Robert When my MAS went I got a PCM/ABS light. Car ran fine.
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1985 Euro Red Carrera Coupe."SOLD",1985 White Targa Carrera. "SOLD",1977 Yellow 930. "SOLD",1991 Black 964 C4. "SOLD",2002 Silver 996 C4 Cab "SOLD", 2001 Polar Silver 996 twin Turbo |
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06-20-2014, 02:35 AM
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Registered User
Join Date: Jan 2014
Posts: 10
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thanks
No strange noises as air injector you explained to me. The car does have a very small idle problem, you can hardly notice it at all and does clear up as soon as I rev to move the car. Clutch is good no slip. I'll start with the obvious as you suggested.
The car is so much fun to drive. My last was an 83 911, wow what a difference. This has also been my peace meal as I have just curtailed my racing down to a couple of races a year. Did it for 29 years SCCA, Formula and production. Would love to find a young not so fortunate kid and put him in the Spec Miata I also own but most of the younger kids would rather take their chances on the street. It's a tough sell to get them on the track. Thanks again |
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06-20-2014, 06:45 AM
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Registered
Join Date: Jan 2008
Location: NJ
Posts: 1,186
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There is no secondary throttle plate. ~3200 is where the cams change timing/lift toward high RPM profile. One of your cam solenoids may be malfunctioning. I would think it would throw a code.
Buy a Bentley manual for your 996. Porsche 911 Carrera (Type 996) Service Manual: 1999, 2000, 2001, 2002, 2003, 2004, 2005: Bentley Publishers: 9780837617107: Amazon.com: Books Or "Porsche 996 the essential companion" This has a lot of information less DIY Porsche 996 The Essential Companion: Supreme Porsche: Adrian Streather: 9781845840969: Amazon.com: Books
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2013 991.1 Carrera S Cab 2004 996 Turbo CAB X50 sold 2003 996 cab 6 speed Sold 1972 RS 3.2 twin plug short stroke crank fire, roll bar, sold DE instructor since 1985 |
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06-20-2014, 06:48 AM
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Registered User
Join Date: Jan 2014
Posts: 10
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Bought it
Thanks Frank, just ordered it. tom
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06-20-2014, 09:49 AM
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