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mitsubishi space wagon gdi lacking power @3000rpm Posted by sherman on November 9, 2005, 9:45 pm hi guys, i have a 2.4 gdi which came to me via another garage and mitsubishi dealer also. this vehcile is a import. when the vehicle is left for approx 20mins after key off from either idling or driving to opt temp, the vehicle will not rev above 3,000 rpm . total flat spot. i have had a few of theses vehicles and the faults have always been throttle boby faults. have swopped the folling from another space wagon. spark plugs [mits only], ign coils, air mass meter, injector amplifier on n/s wing, replaced exhaust & cat/o2 sensor. the ecu was replaced & throttle body by the other garage. have scoped and read liv edata for all the above be fore replacing and could not fault any item. have spoken to asnu injector testers and have been told of carbon deposits may be cause on this engine. so i have removed and bench tested and cleaned injectors with my asnu system and have applied forte gas treatment to the tank and via the main fuel feed to the injectors. guess what still have the same fault. please any body have any ideas  Post a Response ( * ) Required

Re: mitsubishi space wagon gdi lacking power @3000rpm Posted by Rob Drinkwater on November 9, 2005, 10:25 pm, in reply to "mitsubishi space wagon gdi lacking power @3000rpm" Hi Sherman, These Mitsubosho GDI engines DO have a carbon build up problem. The real trouble is that they are direct injection, so they don't have the wash of the fuel through the inlet tract to keep the inlet valves clean, thus they suffer with them sticking open slightly, which can lead to some burning of them. Mitsubishi don't seem to think they have a problem, but Volvo, who also use these lumps in the S/V40 etc do know they have a problem, their's has been cured by Wynn's chemicals, who make a retro fit system that injects a cleaning fluid via the inlet manifold. BTW, putting treatments such as the Forte fuel treatment don't tend to help, as once again they are sent straight to the cylinder, bypassing the back of the valves. HTH Rob.  Post a Response ( * ) Required

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