Question about 2002 Toyota 4Runner

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Engine idle? fuel filter or injectors?

I got a 92 4runner 4cyl. Im tryin to find my fuel filter and how to get at it. The engine runs pretty good, except it runs a little rough at idle, like it stumbles a bit... ive done a tune up (plugs, wires, cap/rotor) Im thinking it must be bad injectors or a clogged fuel filter.
Any suggestions?
thx

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  • skyguy309 Nov 28, 2008

    no engine light on, whats the recommended mileage to replace fuel filter? any other things i should do for a tune-up? Engine was rebuilt at 180,000kms, truck now has around 300,000kms. Starts up great, revs to 2000rms till it heats up, then when its at running temperature, it sounds like it misses once in a while, or stumbles a bit. wondering what it is. Ive noticed a decrease in gas mileage over the past 6 months about 50-75kms per tank now. But it may be just the way im driving. I think it is the injectors now, maybe they arent spraying like they should, just drizzling, should i be replacing them or just cleaning them out? And is there a trick to cleaning out injectors, ive never done it.
    thanks


  • Anonymous Jan 26, 2009

    Ive been trying to get a hold of a can of bg44k, im in canada, so its a little difficult. I listened to the injectors by putting a screwdriver on them, and putting my ear to it. All of them click nicely except for the rear injector #4 i guess. Its gummed up i bet, first one on the fuel rail thats closest to the tank, collects all the **** first. Should i take my truck into a shop and get them to do a on car injector clean? Or is could i just pop off that injector and throw it in some gunk clean stuff for a night?

  • Toyota Ed May 11, 2010

    First, make sure you have the correct spark plugs. Use only the plugs designed for the engine, buy them at a Toyota dealer. "Aftermarket" plugs have been found to reduce mileage, and create driveability problems. Regarding the injectors, I would try to find a can of "BG 44K". Dump a can in, top off the tank and runs the fuel out as soon as you can. I have found that there is NOTHING on the market that cleans injectors like "BG 44-K". Get the right plugs in it and run the BG thru the engine; then get back to me with the results.

  • Toyota Ed May 11, 2010

    Please don't waste your time on the fuel filter. I highly doubt that it is your problem. Clogged fuel filters will cause you problems all of the time, not just at idle. Is the Check Engine light on?

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Dont bother with the filter, its under your intake I believe, but Im sure its not the problem. yes, only use toyota plugs and wires

Posted on Jan 26, 2009

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If your fuel filter was considerably blocked with debris, sand of foreign material, then it is highly possible that your fuel pump would also require looking over (check/replace). In most instances, there is a strainer (a filter of sort) incorporated into the pump. Should you decide to do this, it may also help if you add "fuel injector cleaner" to your tank so as to clean the other fuel lines.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

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