A friend recently bought a 1991 318i that has the wrong exhaust fitted - no cat and the AFM doesn't have a mixture adjuster. Would an earlier unit with mixture control function ok or is a pre cat ECU needed as well.
Any info would be appreciated.
Pre Cat AFM
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daimlerman
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Brianmoooore
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The later AFM should have a potentiometer on it for mixture control, but if the car originally had a lambda sensor it won't be connected to anything.
Under the bulkhead wiring cover, near the middle, there is a plug and socket with a white/black wire connected to each part. This plug and socket will not be plugged together, so just need pushing together to connect the pot.
Under the bulkhead wiring cover, near the middle, there is a plug and socket with a white/black wire connected to each part. This plug and socket will not be plugged together, so just need pushing together to connect the pot.