Question about 2002 Mitsubishi Diamante

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Sputtering like it is not getting enough gas.

My car is sputtering really bad. We have tried numerous fuel injection cleaner but it just keeps getting worse.

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  • Anonymous Mar 23, 2014

    Sputtering doesn't want to accelerate, smell of gas or exhaust, what can be wrong



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Your car has a fuel filter, and i would say the next step is to remove and replace it. it may not fix your problem, but it might and if it does it won't cost much. there are a lot of things that could be happening. you could have a fuel delivery problem and that could be the fuel pump, fuel pressure regulator, an actual blockage in one or more fuel injector, could be lots of things. all the fuel in the system has to flow through this filter and its purpose is to catch junk so it doesn't get further into the fuel system. if it catches enough junk it gets pretty much full of junk and then fuel can't get through. so, go ahead and change it and see what happens. it's under the hood, near the injector rail on the top of the engine. follow the fuel lines back to it. here's the step by step:
1. disconnect battery negative cable
2. remove fuel cap and set it aside till you are done (helps relieve fuel system pressure. some is going to run out but not as much because you took it off)
3.on the fuel filter assembly (it's a round thing with a line coming in and a line going out and a clamp around the body of it) disconnect the fuel pipe. that's the line from the fuel tank. there are two nuts, you want to hold the filter side nut and loosen the fuel pipe side. some fuel will probably run out so be ready for it.
4.disconnect the pressure hose. this is the side that goes to the engine, but it's not a threaded connection it just pushes on. take it easy getting it apart, pull straight in one direction don't twist. you don't want to break the end of that connector off in the fuel line.
5.loosen the clamp around the body of the fuel filter and remove the filter.
and to reinstall
1. put new fuel filter into clamp and tighten clamp doesn't have to be super tight, the lines help hold it in place and you don't want to crush or deform the filter connect the pressure hose (side that runs to the engine) push the connector over the hose until it stops with a click
3.connect the fuel pipe (side that comes from the fuel tank) and here you are supposed to tighten that nut to 27 ft-lbs.
4.wash your hands and get the fuel off before you mess with the battery, always a chance of a spark. reconnect the battery negative terminal
5.replace the fuel cap
6. don't start the car yet, but cycle the key from off to on and back again and look for leaks. this will pressurize the system.
that's about it, what you might want to do is go buy the new part and then you will know exactly what it is you are looking for. you can even check it out at the car parts store and if what they sell you doesn't look like anything under your hood go back in and say so. they don't always get it right and you don't want to only discover their error when you get the thing apart and your new parts don't fit. hope that helps

Posted on May 29, 2009

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Try changeing the fuel filter and checkout these websites and the other one is and if they have your car listed you be able to get pictures and diagram showing you how to repair your car you can also checkout your local library and get your hands on a Haynes auto repair manual.

Posted on May 29, 2009


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