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Registered
Join Date: Dec 2010
Location: Vancouver B.C.
Posts: 244
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After reading just about every post about 3.2's I came across a comment made by Steve Wong in 2004 about how to test the AFM using a 9V battery . You hook up the battery to terminals 3&4 and check the voltage on #2&1 . Mine read .39v , as I slowly opened the barn door there was no change in voltage until it was opened about 1/8 of an inch then it progressed up in voltage to wide open 8.3v . I loosened the screw on the wiper arm and adjusted it so that I have smooth , constant voltage rise from idle to wide open throttle , without interruption .Gretchen hasn't run this good in years !!
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05-29-2018, 08:26 PM
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Member 911 Anonymous
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Here you go:
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'85 Carrera Targa Factory Marble Grey/Black * Turbo Tail * 930 Steering Wheel* Sport Seats * 17" Fuchs (r) * 3.4 * 964 Cams * 915 * LSD * Factory SS * Turbo Tie Rods * Bilsteins * Euro Pre-Muff * SW Chip on 4K DME * NGK * Sienes GSK * Targa Body Brace PCA/POC |
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05-29-2018, 08:44 PM
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Registered
Join Date: Oct 2016
Location: Kansas
Posts: 1,254
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Quote:
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1987 Porsche 911 Carrera Coupe |
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05-30-2018, 09:45 AM
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Member 911 Anonymous
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For our aging high mileage cars, Yes.
Unfortunately BOSCH does not offer a replacement potentiometer (that white green PCB board). Our only option is to reposition the arm so it will take a new path on the strip. Caveat, you must be careful to make absolute certain the tension is adequate and not too much to make your new path wear out too quickly. The other thing is to check the contacts are absolutely smooth so it can glide without gouging the strip. Yes, quite complicated to say the least. The 9 volt with DVM test shows where it is not making a full contact ergo the fault.
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'85 Carrera Targa Factory Marble Grey/Black * Turbo Tail * 930 Steering Wheel* Sport Seats * 17" Fuchs (r) * 3.4 * 964 Cams * 915 * LSD * Factory SS * Turbo Tie Rods * Bilsteins * Euro Pre-Muff * SW Chip on 4K DME * NGK * Sienes GSK * Targa Body Brace PCA/POC Last edited by DRACO A5OG; 05-30-2018 at 10:04 AM.. |
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05-30-2018, 10:02 AM
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Still here
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But still, you are not doing your engine any favors by running at 2000 rpm 
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05-30-2018, 10:02 AM
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cycling has-been
Join Date: Sep 2004
Location: Jersey Shore
Posts: 7,244
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Quote:
Bill K
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73 911T MFI, 76 912E, 77 Turbo Carrera |
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05-30-2018, 10:15 AM
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Registered
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1985 911 with original 502 191 miles...808 198 km "The difference between genius and stupidity is that, genius has its limits". Albert Einstein. |
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05-30-2018, 10:21 AM
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Join Date: Feb 2009
Posts: 72
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3.2 problem
Some of these replies are simplistic to say the least. Suggesting that SF911 drives at a higher rpm than 2200 insults his intelligence and mine.
SF911 has a driveability problem that shows itself at 2200 rpm in fifth gear. The bucking and kicking is not a pleasant way to drive a Porsche and he has obviously tried numerous adjustments as suggested by interested Pelicans. I would assume he has also spent many sleepless nights trying to resolve the problem in his mind. Thanks to those who engaged the issue in a helpful and positive way. Speaking for myself it is those engagements that make this site such an educational and rewarding reading experience. Great to hear the problem was finally solved (by tracking a previous Steve Wong post) and the car is now running as it should at 2200 rpm and beyond. |
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05-30-2018, 09:00 PM
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Still here
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If you read thru the entire thread, checking the AFM was mentioned multiple times as was running at a higher engine speed. Both are sound pieces of advice. Last edited by pmax; 05-30-2018 at 11:19 PM.. |
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05-30-2018, 10:39 PM
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Marble Grey
Black Label
