Question about 1995 Ford Bronco

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1995 Ford Bronco 172 EGO not switching lean bank1- jerks when run

New o2 sensor, new ignition control module,new plugs, cap, rotor,wires, new fuel pump and filter, instected intake and exhaust. Used to do it when warmed up, now almost always. Koeo no codes. Koer 172 EGO not switching lean bank 1.

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Have u checked for vacuum leaks or poss leaking EGR valve? use carb spray around the upper intake manifold where it bolts to the lower manifold, spray vacuum lines where they are connected to the engine vacuum ports, the idle speed will change if u hit a leak, as far as the EGR valve goes see if it gets hot at idle, if it does it is leaking, if all checks ok replace the O2 sensor, but i suspect u will find a leak at the upper intake plenum.

Posted on Jan 10, 2009

  • Ron Pilling
    Ron Pilling Feb 03, 2014

    thank you will follow advice and feed back

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