The numbers also need to be compared at KOEO thats when they need to be within .5psi Idel is a diffrent story

But no matter EBP wasnt close so somethings up with it for shure

 

My KOEO readings were around 13.7 for the BAR and MAP, EBP stayed the same as it is with it idling at about 7.1.

 

Could the egr valve have anything to do with a ebp that is half what the map and bar are?

 

egr will only have an effect on a egnine while its running. if you are at 6-7 psi koeo your in default mode. its really that simple.

 

Gotcha, still figuring out how all that works. Would an unplugged ebp sensor show around 7 or so? Amdriven2liv said 7 was way low. Since the sensor is not working, would an unplugged sensor show the same reading as a bad sensor thus giving a default reading? Was curious what an unplugged one read at.

 

I'll add my 2 cents into this, but not too sure how much it helps.

First off some seemingly useless facts specifically regarding '05 model year applications. EARLY '05 engines have the following identifying features. They have a MAF sensor, dummy rails and standpipes that use a 1/2" square drive to remove/install on the high pressure oil rails. These can be updated to the to the style that has the lower white teflon reinforcements and require a 12mm allen head to install, although these styles don't tend to fail the lower d-rings like the later ones do. They also have the said EBP sensor mounted on the thermostat housing the same as '03 and '04 engines do which are part number 4C3Z-9J460-A from Ford.

LATE '05 engines DO NOT have a MAF sensor. Instead, they have an IAT sensor mounted on the ACL (Air Cleaner Lid). '06 model years onward re-introduced MAF sensors. These engines are also originally equipped with the same style of dummy rails and standpipes like the '06 engines are, that require a 10mm allen head to remove/install. THESE are the ones that tend to fail the lower d-ring on the dummy rail plugs and can also be updated to the style mentioned above. These engines also utilize the re-located EBP sensor where the tube is secured to the front FICM mount bracket on the driver side valve cover. This style EBP sensor uses a slightly larger diameter and coarser thread, where it threads into the tube, making the early and late applications different and non-interchangeable. The part number for this style of sensor is 5C3Z-9J460-B, the same aas an '06 and newer engine.

For what it's worth, of the three wires on the EBP, two of them are spliced with the ICP sensor and EGR valve. The only unique wire between the EBP and pin #27 of the PCM's middle connector would be the violet with light blue stripe coloured wire. I suggest the OP check for continuity on this wire between the EBP sensor connector and the middle PCM connector before proceeding to replacement of the EBP sensor. Another quick and easy test to perform would be to simply disconnect the connector from the sensor and temporarily plug in a known good sensor from another vehicle into its place and re-check its reading at key-on/engine-off just to see if it reads atmospheric pressure.

HOPE THIS HELPS