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Porsche Junky
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Beware....The Bucking....
I came suddenly....silently....
It came as I was having a little tet a tet with a 350Z down an uncrowded rural highway... Done toying, I downshifted and waited for the boost to propel me away from the Z when BAM! The Bucking.... Today was my first chance to really explore the issue...there is definitely a correlation between a suddenly lean condition showing on my WB A/F meter near full boost and....The Bucking....but the car runs great otherwise To be continued......... 
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1986 930 RUF equipped |
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07-07-2007, 02:42 PM
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A fellow Pelacanite
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Overboost switch ?
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1981 UK 930. G50/01 shortened, 964 3.8RS Fibreglass Body Kit, 18" Alloys 8.5" F & 10" R, 225's F & 285's R, Special Colour Metallic Blue Paint, FIA Sparco Evo's, A/C and Air Pump removed, Electronic Boost Controller, GHL Headers, Tial46 WG. Fitting - New service kit. Needs Fitting - Innovate XD-16 Kit, Kokeln IC. Stephen's K27 HFS, EVO Intake Assy & his Modded USA Fuel Head. 1983 UK 911 3.2 Carrera Sport Coupe. Black, Black Leather with Red Piping, Black Alloy Gear Knob, K&N Air Filter Element, Turbo Tie rods. Needs Fitting - K&N CO Sensor, Round A/F Dial Gauge, Factory Short Shift Kit. http://www.danasoft.com/sig/Iamnotanumber.jpg |
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07-08-2007, 04:30 AM
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Manassas, VA
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See my post above
It's called "Intercooler Wiring Modification"
Mark
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1991 964 Polar Silver Metallic Turbo Coupe |
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07-09-2007, 07:58 PM
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Registered
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Oh, too bad you weren't in that 3.6 conversion you sold to me... you'd have blasted by that Nissan - like when the Enterprise accelerates to mock 10 in Star Trek next Gen... as if you forgot
 Hee Hee
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James 91 Black on Balck 964 C4 (DD) 82 Metallic Red SC 3.6 Varioram (sold) |
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07-13-2007, 12:48 PM
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Porsche Junky
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Hehhehheh....I smoked that Z even with the overboost prob....
 Undoubtedly my wastegate is sticking....havn't had time to investigate further...
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1986 930 RUF equipped |
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07-16-2007, 05:18 AM
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Wo ist die Rennstrecke?
Join Date: Mar 2004
Location: St Johns, FL
Posts: 1,210
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Re: Beware....The Bucking....
Quote:
But I did.... |
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07-16-2007, 04:59 PM
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Porsche Junky
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Quote:
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1986 930 RUF equipped |
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08-02-2007, 01:40 PM
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Registered
Join Date: Feb 2002
Location: Atlanta, GA
Posts: 933
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What makes you think it is the wastegate?
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C.H. Boost Addiction - honestly, I have it under control 1989 911 Turbo Cabriolet Mods include: Kokeln IC, GHL Headers, Hooligan muffler, Modified K27 7200, BL WUR, LC-1 & XD-16, Bilstein Sports (4), TRG sway bars, Oversize torsion bars, Strut brace |
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08-17-2007, 12:01 PM
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Registered
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Did you fix the problem? My car was doing the same thing - bucking violently when coming off of full boost/throttle. Ended up being a torn wastegate diaphragm. It was maintaining the correct boost pressure at WOT, but once I lifted the boost would spike and trip the overboost sensor. A quick way to check: Disconnect the wastegate boost signal line at the intercooler and blow into it. if air passes thru you have a leak.
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Steve 85 930 |
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08-20-2007, 09:05 AM
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Registered
Join Date: Jun 2001
Location: Sweden
Posts: 5,911
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Quote:
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Thank you for your time, |
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08-20-2007, 01:23 PM
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1982 Porsche 911 SC 3.6 L
914 2.0
944 Turbo
1986 Porsche 930
1991 Porsche 964 Turbo 3.3L
1982 Porsche 911 3.6 Varioram
1985 Porsche 930 3.3
