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Old 09-07-2012, 05:17 PM   #91
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Thanks everyone...I am going to check again for vacuum leaks..I also found some info on the DPFE sensor and a test to see if it is the culprit....will update soon..
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Old 09-17-2012, 04:43 PM   #92
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OP (mca8302000)..wait for other responses to this idea...
Ford is having trouble with the Fuel Damper on the 1.6 and 1.8 ECOBOOST models. The damper is similiar in construction to a pressure/flow regulator.
I found a toyota forum discussion where the pressure and flow was maintained before the damper, but flow rate was diminished on after a failed damper.
The damper has a very rare failure, but my research (though I didn't get details I wanted) suggest it may be a consideration here (since so many other things have been ruled out.)
Does anybody have any experience with a fuel damper failure?
Does anyone have a testing procedure for one?
(The Ford part prices kinda of high to just swap out for a new one 9J279 $123.00)
It could be eliminated, but that creates potential failures elsewhere that would be as bad. Risk damaging fuel injectors for one (according to research.)

See http://www.motor.com/magazine/pdfs/012004_08.pdf

Last edited by spiller; 09-17-2012 at 04:59 PM. Reason: add link to technical article
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Old 09-17-2012, 07:06 PM   #93
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If the pressure was steady and it was a low flow condition then it shouldn't affect her idle. It would have trouble gaining RPM at higher levels. Her problems all happen below 2k rpm. Since parts have been thrown at the car like a little league pitcher I would suspect it is something wiring related. Perhaps the IAC wiring is intermittent or damaged, I like the ground idea that you put forward, failing that I would suspect a fuel injector is failing. Lets face it, this car needs to be data logged in order to provide a direction to focus future efforts on. In the mean time it doesn't cost much to clean up the ground connections at the different parts of the car (I believe the dealerships even have a map of the grounding points of their cars). As before I wish CMA good luck sorting this out and soon.

Last edited by oshoguno; 09-17-2012 at 07:09 PM. Reason: Typos
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Old 09-17-2012, 08:27 PM   #94
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If the pressure was steady and it was a low flow condition then it shouldn't affect her idle. It would have trouble gaining RPM at higher levels. Her problems all happen below 2k rpm. Since parts have been thrown at the car like a little league pitcher I would suspect it is something wiring related. Perhaps the IAC wiring is intermittent or damaged, I like the ground idea that you put forward, failing that I would suspect a fuel injector is failing. Lets face it, this car needs to be data logged in order to provide a direction to focus future efforts on. In the mean time it doesn't cost much to clean up the ground connections at the different parts of the car (I believe the dealerships even have a map of the grounding points of their cars). As before I wish CMA good luck sorting this out and soon.

when you say data logged , do you mean having the codes checked, like when the CEL is on or is this something more involved...Through all this, the CEL has never come on expect once when before I changed the whole throttle body, the wrong TPS was put on..when that was corrected , CEL cleared..
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Old 09-17-2012, 08:53 PM   #95
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No data logging is driving the car with a data log device connected. It gives a viewable analysis of the sensors as the engine is running. Usually, it's a flash programmer hooked up to a laptop.
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Old 09-17-2012, 09:16 PM   #96
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No data logging is driving the car with a data log device connected. It gives a viewable analysis of the sensors as the engine is running. Usually, it's a flash programmer hooked up to a laptop.
Do I need to take this to a dealer to have done or can any repair shop do this and is it costly? thanks
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Old 09-18-2012, 02:43 PM   #97
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I am not sure how much it costs and it would depend on the shop. The dealer could but they would be the most expensive. I think there is a loaner program available at some places but I am not an expert in this regard. The logger would track all the sensor readings while you drive and then you can bring them up on a laptop and someone who knows what they are doing can check out the results. It could show you things like a drop in fuel pressure, air flow readings when compared to engine rpm, etc.. The problem with your car is that it needs to be diagnosed and nobody is doing that, they are just guessing at possible causes and playing swaptronics with parts.
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Old 09-18-2012, 05:20 PM   #98
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I am not sure how much it costs and it would depend on the shop. The dealer could but they would be the most expensive. I think there is a loaner program available at some places but I am not an expert in this regard. The logger would track all the sensor readings while you drive and then you can bring them up on a laptop and someone who knows what they are doing can check out the results. It could show you things like a drop in fuel pressure, air flow readings when compared to engine rpm, etc.. The problem with your car is that it needs to be diagnosed and nobody is doing that, they are just guessing at possible causes and playing swaptronics with parts.
Yes! Swaptronics is an expensive game ...I am pretty stressed over this car..Guess I have to do some research on this data logging..thanks for your help.
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Old 09-20-2012, 01:28 PM   #99
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http://www.aa1car.com/library/2002/us90224.htm

On the link above, you will find the statement, "If the torque converter fails to release at all, it can cause the engine to buck and stall when coming to a stop."
It may be that, and while the Torque Converter is always engaged by the engine, I still have doubts about about how it would cause your issues even in "P" or "N"....
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Old 09-20-2012, 05:34 PM   #100
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I have had this happen to me before on a GM car. It would not keep running (poorly) but would be like stopping a manual car without popping the clutch. Nice find though, good research!
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