Question about 1996 Toyota 4Runner

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1996 4runner is missing when I accelerate and has some hesitation and loss of power.It has 144,000 miles and I changed the timing belt and water pump at 140,000. A mechanic is looking at it right now and said it has the wrong spark plugs in it(motorcraft), but he is not sure if that is the problem. He is still looking at it.

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  • Toyota Ed May 11, 2010

    Clarification on spark plugs:

    Motorcraft plugs will NOT work in any Toyota. The heat range is totally different & very incompatible. I have replaced plugs many, many times with the correct plugs, (after the owner put his own plugs in, and it ran worse). Believe me, Toyota run best with Nippondenso and NGK plugs. Nothing else. Also, replace the plug wires if they are 5 years or older. Let me know how it turns out.

  • jac wilson May 11, 2010

    misfire under acceleration typically secondary ignition id check the plugs first, then cap rotor, then wires, i am not convinced that a motorcraft plug would cause a misfire. unless heavily worn. also is it a v 6 or a 4 cyl?

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Check the fuel pump and filter. This can cause a loss of power and hesitation. I doubt it is the spark plugs unless it started doing it right after you changed them.

Posted on Jan 01, 2009

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