Question about 2003 Ford Escape

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Starts really hard, rpms go way up. and when driving there is a hesatation just here and there., also some times the rpm jump way up for no aparent reason.Have had all new spark plugs and wires, fule injectors cleaned and a new cadilac converter put on in the last two months and still doing it. Have also had transmission looked at and all is clear. And a complete reset of the computer at time of cadilac coverter install, now it reads miss fire on 4 cylenders. Can anyone help me?

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It could be the mass air flow sensor or manifold air pressure(MAP)sensor.Some makes have 1,some the other.It could be your problem because it is basically helps make the gas/air mixture correct.It does strange things like that.I have only been on this site a couple of weeks,but I see that strangeness alot and people do the same thing you did(sorry about you going through all those parts)and it definitely will cause misfire.Good luck!Also,if you have Autozone where you live,they do some certain computer checks for free.I have only done a few basic ones but my mechanic told me Autozone does that.

Posted on Aug 03, 2010


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