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RETIRED
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adjustable or hammer time?
I recently completed a run up to Big Bear with a bunch of Pelican Parts BBS
listers. While up in the 7-8,000 foot elevation range my new 3.6 powered SC's engine decided it did not like to rev past 5,000 rpms. Is this typical? Once down from the hill it ran great. It also smells a bit rich. Scope and adjust? or Hammer time? |
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11-20-2002, 06:45 AM
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SCWDP- Shock and Awe Dept
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Did you throw in the other disks yet? I have no idea if it would help but you mentioned it Sunday. Besides, you can't have an SC (Paul’s w/ the sport exhaust) louder than your 3.6, can you?
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Ryan Williams, SCWDP '81 911SC Targa 3.6 '81 911SC Coupe 3.2 #811 '64 VW Camper Bus, lil' Blue |
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11-20-2002, 08:57 AM
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Administrator
Join Date: Feb 2000
Location: Los Angeles
Posts: 13,333
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My car didn't have any trouble on the last Big Bear run, although I'm not sure we took the same route, and other factors (temp, barometric pressure and humidity) might have been different. Your exhaust is different, too.
On my car, the 'binary-o-ram' secondary plenum kicks in at about 5500 rpms. I wonder if the lower ambient air pressure could have been taxing the vacuum reservoir's ability to trip that switch? Or is your motor Varioram? Is your motor set up with a hammer plug? I've considered adding it to mine.
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Jack Olsen 1972 911 My new video about my garage. • A video from German TV about my 911 Last edited by Jack Olsen; 11-20-2002 at 10:59 AM.. |
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11-20-2002, 10:56 AM
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RETIRED
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Hmmmm, nope....no return to the louder sounding muffs.....the neighbors like it.
My gut feeling, is that I MAY have to throw in an 02 sensor....maybe the FI is having a problem with out it.... |
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11-20-2002, 12:49 PM
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You do not have permissi
Join Date: Aug 2001
Location: midwest
Posts: 39,884
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Most of the OBD2 systems will go into an over rich safe-mode without a major sensor, but will the pcar do that with a non-existant O2? Any way to check the codes?
Try the run with the plug in the O2 bung removed, mabye too much backpressure? (edit: this shouldn't be it-there's less flow there) An expensive route, but this may be worth it: Ease software has connector adapters that will let you hook up the Datalink to a laptop and let you record everything the computer see's while you recreate the situation. I think OBD2 doesn't save a nice 30 second datastream like the OBD1, only a snapshot when its tripped. There may be a temp or pressure sensor not functioning/spec. On that same note, were the sensors put in the same positions during the conversion i.e. ambient temp sensor under the front bumper and not on top of the engine? Last edited by john70t; 11-20-2002 at 01:51 PM.. |
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11-20-2002, 01:44 PM
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Da cab
1981 Porsche 911SC Targa 3.6
