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Registered
Join Date: Nov 2012
Location: Bydgoszcz, Poland
Posts: 222
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lambda system freeking out in a 930
hi fellows Pelicans.
lambda system is freaking out in my 86 930. it is a US version - 930/68, with lambda circuit controlling mixture/emission. car runs great without lambda sensor connected. once it is hooked up, however, AFR goes down to ~10 or even below. once sensor is disconnected, it goes back to whatever is set using mixture screw. below two videos showing how it behaves. https://youtu.be/dVhl5wPgZIg https://youtu.be/yJJd4x7ESO8 lambda sensor has already been replaced with new unit. anyone any ideas? thanks! Krzysztof
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VW 1200 Sparkafer 1973 VW T2b Westfalia 1979 Porsche 930 Turbo Carrera US, 1976 ================ 911S 1976, 930 1986 - both gone |
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07-02-2017, 01:24 PM
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Registered
Join Date: Oct 2006
Location: MYR S.C.
Posts: 17,321
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do you mean the O2 sensor was replaced?
check speed relay, perhaps bad solder joint. one side it for the fuel pump the other for the O2 sensor throttle position switch
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86 930 94kmiles [_  _] RUNNING:[__] NOT RUNNING: ____77 911S widebody: SOLD88 BMW 325is 200K+ SOLD 03 BMW 330CI 220K:: [_ _] RUNNING: [__] NOT RUNNING:01 suburban 330K:: [_ _] RUNNING: [__] NOT RUNNING:RACE CAR:: sold |
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07-05-2017, 05:05 AM
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Registered
Join Date: Nov 2012
Location: Bydgoszcz, Poland
Posts: 222
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hi folks,
thought i'd come back to this thread to report on the solution. appeared that it was a bad ground. ended up adding addn'l grounding wire to the o2 sensor brain unit and all is back to the order now. thanks for suggestions! Krzysztof
__________________
VW 1200 Sparkafer 1973 VW T2b Westfalia 1979 Porsche 930 Turbo Carrera US, 1976 ================ 911S 1976, 930 1986 - both gone |
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09-03-2017, 12:23 PM
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