Date: Sat, 25 Jan 2003 23:56:41 +0100
From: Nel Frikandel <>
Subject: Re: '91 9000T "Check Engine"

On Fri, 24 Jan 2003 19:00:46 +0000, Richard Chew <> wrote: True, however what puzzles me it is not constantly on when on LPG then. Sometimes I don't see it for weeks (running constantly on LPG), then it comes back on. I also had periods when it came on at startup, and went of again after a while. Sometimes it just stays on for weeks and the engine runs horribly. Shocking and no torque. And the amazing thing is this symptom seems to change with wether. When moist and rainy, I have chech engine on, when dry (either freezing of mid summer) it stays away for weeks in a row. My LPG system is a DELTEC. It was in the car whern I bought it, and unfrotunately is out of it's 2 year warranty already. I think the LPG system is far from optimal, but I keep getting the runarounds. My SAAB shop sais the problem is in the LPG system, and they can't do a thing about it, and when I go and have it checked the LPG company, they do some "adjustments", charge me 50-100EURO labour, and nothing changes. That's such a pity because otherwise it's really a fine car to drive. >The check engine light will come on when under gas because there is a >difference in the amount of O2 in the exhaust between gas and petrol, in >as much as the ECU sees the wrong readings than it should, as it thinks >it's running on petrol. > >Not sure about the 9000, but the 9-3/9-5 you are able to tell the ecu >it's running on gas. Not sure if you can with the 9000, though. > >Hope this helps > >>My '95 9000CS has often the check engine coming on. mostly it >>disappears after the next startup. Sometimes even while driving it >>goes away again. Worst case I have to pull the battery connector for a >>couple of seconds to be rid of it. >> >>It is a '95 9000 (B204i/NoTurbo), LPG converted since 2000 and I >>blamed the light on the gas system. Since the light never comes up on >>gasoline, only on autogas. >> >>Is there a way to determine the need for replacement of the sond? >> >>Nel

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