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Rich problem 700 1991

posted by  Will740turbo on  Thu Oct 8 20:20 CST 2009
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last visit: Wed Oct 22 16:09 CST 2014
[RELATED]

I know others have mentioned it, but have you pulled the vacuum tube off the fuel pressure regulator? Check it for leaking gasoline.
I believe you can have a bad regulator and still hold full pressure. Instead of dumping the excess pressure to the fuel tank, it dumps it to the injectors.

Also, thanks to the poster with the info about creating false lean/rich conditions via the O2 sensor. Seems like some useful info.

Good Luck,
Will
--
1990 740 Turbo, on its way to stock specs, maybe beyond






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