Re: 1995 900 2.0 Turbo Loss of Power - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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Re: 1995 900 2.0 Turbo Loss of Power
Posted by Ron (more from Ron) on Thu, 14 Jan 2010 05:09:19
In Reply to: 1995 900 2.0 Turbo Loss of Power, Tom Cook, Wed, 13 Jan 2010 17:34:36
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What kind of mileage are you getting? With the O2 sensor out of the equation, you should be getting poor milage since the engine should never get into closed loop mode. If you're getting good mileage, I suspect that the ECU is having the injectors push the maximum amount of fuel to the intake. If the fuel pressure is down because of a weak fuel pump, the engine 'might' run pretty good, at least until the fuel pump dies. If this started after you changed the fuel filter, you might have loosened some dirt in the fuel system which is holding the fuel pressure regulator (FPR) open a litte, which is reducing the fuel pressure to the injectors (and reducing flow). Obviously, these are just guesses at this point wihtout knowing what the actual fuel pressure is... Ron
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