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  #11  
Old 11-19-2019, 11:12 AM
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I know why mine ran rich but because of the idiotic non gauge thermo indicator I didn't know my engine was never coming to temp so suggesting to check for the same.

Make sure engine gets to operating temp so the DME stops makeing the fuel mix rich.
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  #12  
Old 11-20-2019, 07:46 PM
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Quote:
Originally Posted by upallnight View Post
Short term fuel trim is spot on but long term fuel trim is -25 so the DME is taking away fuel which indicates a rich condition. Does the long term fuel trim go down when you raise the rpm and hold it for a minute or two?

What type of gas are you using? Ethanol gas aka gasohol?


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  #13  
Old 11-20-2019, 08:14 PM
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Here are some more stats, including temp - she's warming up. So we can eliminate that. It does appear that downstream Bank 2 has a bad connection.

Same info, one with raised RPMs.
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01' DINAN 7 S62 Swap - Stratus Grau
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85' BMW 635csi, 60k miles
Greenville, NC
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Old 11-21-2019, 09:05 AM
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Your 02S1 volt for B2 seems to varies the most compared with 02S1 for B1. The voltage drops from 0.67 v down to 0.05 v. Could be a bad 02 S1 sensor for B2 or because the voltage for 02S2 B2 doesn't seems to be changing the DME is assuming that the mixture is still rich so it continues to remove fuel from the mixture and that is why the fuel trim is so high. This is just base on a snapshot of the engine, the voltage should be varying constantly. If the volatge is not varying you could have a lazy 02 sensor.
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Old 11-22-2019, 02:34 PM
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I guess in short, with the age and supercharger - I should slate it to replace bank 2 up and down and ride.

Looks like $60 upstream and $90 downtstream on FCP with ye old lifetime warranty
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01' DINAN 7 S62 Swap - Stratus Grau
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02' 4.6is DINAN X5 S2 Supercharged
833/3258 produced | 1/27 Dinan X5's
85' BMW 635csi, 60k miles
Greenville, NC
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Old 12-01-2019, 04:10 PM
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Sensors on order.....waiting.

Hope to install next weekend!
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01' DINAN 7 S62 Swap - Stratus Grau
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85' BMW 635csi, 60k miles
Greenville, NC
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