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B230FT fuel pressure? 900 1993

posted by  anarchyx34 on  Mon Jul 28 06:15 CST 2003
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last visit: Thu Feb 21 03:14 CST 2008
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I've been having an emissions problem (high HC & NOX) that I'd like to figure out. SOme have suggested I'm running lean so I checked the fuel pressure. I'm getting 40psi at idle, and 44psi with the regulator unplugged. Is that good?
--
'91 Volvo 740 wagon. A big comfy box.... and a '90 Mazda 626 GT turbo, 16psi on upgraded turbo and a bunch of other mods.








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    More likely bad cat or (open to see) 900 1993

    posted by  JohnBin on  Mon Jul 28 07:05 CST 2003
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    We recently had a high nox and hc because the connector to the throttle switch was disconnected! Hooked it up and it went away.

    Of course, there was also a pressure leak in the hose to the compressor bypass valve (1987, not on your car) that was probably leaking enough to enrich the mixture excessively.







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