Question about 1995 Ford Bronco
I put it on the dianogstic and it say the oxyen sensor but i change it.
It might have a intake manifold leak. Sucking in enough air the computer can't put enough fuel to compensate. Check all your vacuum lines, and might pull the EGR valve off and inspect. If the EGR sticks open slightly that would make a vacuum leak. I have seen both intake gasket on 5.0 and the 5.8 do this as well as an old EGR valve.
Posted on Dec 06, 2012
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Posted on Jan 02, 2017
It would be highly unlikely for both O2 sensors to go bad. I strongly suspect they are reading what is actually happening,the engine is running lean. Probably from some un-metered air getting into the engine either from a vacuum leak or from a leak somewhere on the engine side of the mass air flow sensor. What usually causes a concern on this vehicle is the orings between the upper and lower intake manifold.
Posted on Mar 25, 2009
There are 2 O2 sensors on your Ford Ranger. There will be one a foot or two before the catalytic converter and one a foot or two after the converter. I don't have a diagram but you will only need to look for the identical sensor located up or downstream from the first one that you replaced.
Posted on May 17, 2009
SOURCE: TOO LEAN CODES
yes very very common code for these motors i get them all the time. now the first thing i do is listen to the pcv valve for noise if it is rattling this is the problem and is the most common of all. another thing is the intakes leak from cracks in them but the only way to find it is with a smoke machine. now the one other thing i have seen before is debre like a leaf in the mass air flow sensor but you have replaced it so most likely no that.
do your self a favor and change the pcv valve it only cost under 5 dollars. if this is not it you will need to find the leak in and around the intake or a vacuum hose.
because you have two lean banks this mean if it is a leak then it has to be in common with both banks and that is the vacuum line system intake etc...
let mew know if you have any more question. good luck man
Posted on Oct 21, 2009
Take your Bronco to an Autozone or Oreillys for a free scan. Offhand a new ignition switch would seem like a good idea, because the fuelpump should not be working in the ACC position.
If a new ignition switch does not help the fuelpump problem the pump is wired to an accessory. You need to look up the fuse info in an owners manual.
Posted on Dec 01, 2009
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