Original Assignee Ford Global Technologies LLC Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) ( en Inventor Tobias Pallett Gopichandra Surnilla James Kerns Suzanne Wait Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Fee Related, expires Application number US11/514,600 Other versions US20070051092A1 Google Patents Air/fuel ratio validation for lean burnĭownload PDF Info Publication number US7421836B2 US7421836B2 US11/514,600 US51460006A US7421836B2 US 7421836 B2 US7421836 B2 US 7421836B2 US 51460006 A US51460006 A US 51460006A US 7421836 B2 US7421836 B2 US 7421836B2 Authority US United States Prior art keywords exhaust gas gas sensor fuel engine air Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US7421836B2 - Air/fuel ratio validation for lean burn

It was a pretty simple reset - a couple of revs and we're all done.US7421836B2 - Air/fuel ratio validation for lean burn Rev the vehicle until that happens and then you can turn the engine off. The test complete when Misfire Monitor, Wheel Profile Down Count reaches zero. It says to snap the throttle to increase RPM above 3,500. I've got my buddy Jim in the car over here and we're going to go through these tests. The engine needs to be at normal temperature, gear selector has to be in park or neutral, air conditioning, and defroster need to be off. It should be performed following a PCM replacement, internal engine repairs or crank sensor or trigger replacement, so there are quite a few different times when you might need to do this in the shop. It resets or learns the misfire monitor neutral profile correction. It gives us a little history or a description of how it works.

This takes place in the engine so we'll go inside the Engine and it's a Functional Test, so we'll go to the Functional Tests, and there it is right there: Misfire Monitor Neutral Profile Correction. I'm going to show you how we can do that on the Snap-on scan tool. Sometimes, after replacing a part or completing a repair on a vehicle, you have to do a factory-level Functional Test or some sort of reset to get that vehicle all set and ready to go.įord has this thing called a misfire monitor neutral profile correction that you have to do anytime you replace ECMs, crank sensors or anything in that system.

Misfire monitor profile correction sct x4