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As long as they're functioning properly, which use of a mallet gives me at least a little reason to suspect might not be the case here.
Norm
its possible he has a bad sensor, but he should have issues without the car moving too, as the sensor is a torque sensor, i have installed them on the column mounted epas systems a touch off before, and the result is a steering wheel that ghosts to one lock or the other at idle when assist is the highest. its unlikely that his torque sensor is damaged but only reads incorrectly when the vehicle is in motion.
I was just thinking there was some sort of fluid issue with the brakes. I also understand that the clutch uses brake fluid. My downshifting might be aggravating the issue.
Thanks for the replies.
The clutch and brakes use the same type of fluid, but that is where the commonalities end. They are separate systems. They do not share reservoirs, lines, etc. One will not effect the other in any way.
I want you guys to forget I mentioned the brake pulling for a minute and also that it only pulls left. It did happen, but is so rare I will probably bleed the brakes if it happens more often and get the calibers checked.
I want to concentrate my concerns on these minor steering wheel forces fighting me that happen a little more often.
It sounds like the nibble control of the EPAS is a good explanation for what is happening. Heck it might be normal if I am driving the car hard with lots of shifting up and down and maybe hitting a reflector in the road or some other imperfection in the road?
It also sounds like Tramlining could affect the nibble control.
I like where the thread is going with this and thx so much for the input so far.
Ford's EPAS systems also include features called "active nibble control" and "drift-pull compensation". Those things involve the EPAS making small corrections of some sort, and they absolutely do make the steering unreasonably sensitive to changes in the front LCA bushings. Basically I wouldn't eliminate the EPAS being at fault just yet.
Norm
Please explain how the LCA bushings relate to EPAS?
The front tires are also stock circumference. I read that different front tire sizes can affect EPAS and front tire sizes other than stock with EPAS are a bad idea.
255/35/r20 in front that are Pirelli Ford stock with 25,000 miles still good, but worn. 275/35/r20 in back that are Firestone Oval 500 couple months with 1500 miles max.
Pirelli have a rep for Tramlining on the forums.
lowered an 1" to 2". Forum can slightly distort. Click on pic to expand.
suspension
EPAS joint and steering shaft in silver. This is the part they replaced using a mallet to separate the joint and get it off.
Please explain how the LCA bushings relate to EPAS?
It seems that firmer than OE LCA bushings give the OE EPAS fits - maybe unexpected feedback throws it off into a logic loop or something. This is a real problem - Ford knows about it and does not offer a reflash fix. The only "guaranteed" solution for those with poly or whatever other aftermarket material LCA bushings has been to swap out the production EPAS for the FRPP EPAS unit, part number M-something or other, which does not include the ANC or DPC logic. The guys at Vorshlag know a whole lot more about this than I do.
It's a warning flag to me that if the production EPAS is that sensitive to things like bushings, beating on it or on things connected to it might also be a bad idea, or that there's a different problem possible in the production EPAS that's as yet undiagnosed.
Norm
Last edited by Norm Peterson; Oct 15, 2015 at 11:15 AM.
It seems that firmer than OE LCA bushings give the OE EPAS fits - maybe unexpected feedback throws it off into a logic loop or something. This is a real problem - Ford knows about it and does not offer a reflash fix. The only "guaranteed" solution for those with poly or whatever other aftermarket material LCA bushings has been to swap out the production EPAS for the FRPP EPAS unit, part number M-something or other, which does not include the ANC or DPC logic. The guys at Vorshlag know a whole lot more about this than I do.
It's a warning flag to me that if the production EPAS is that sensitive to things like bushings, beating on it or on things connected to it might also be a bad idea, or that there's a different problem possible in the production EPAS that's as yet undiagnosed.
Norm
Originally Posted by Norm Peterson
It seems that firmer than OE LCA bushings give the OE EPAS fits - maybe unexpected feedback throws it off into a logic loop or something. This is a real problem - Ford knows about it and does not offer a reflash fix. The only "guaranteed" solution for those with poly or whatever other aftermarket material LCA bushings has been to swap out the production EPAS for the FRPP EPAS unit, part number M-something or other, which does not include the ANC or DPC logic. The guys at Vorshlag know a whole lot more about this than I do.
It's a warning flag to me that if the production EPAS is that sensitive to things like bushings, beating on it or on things connected to it might also be a bad idea, or that there's a different problem possible in the production EPAS that's as yet undiagnosed.
Norm
It seems the M3200 rack is a good fix for 2011 issues, but not for 2012 or 2013. In fact the 12 to13 rack is a fix for 2011 issues.
I will prob get an alignment and maybe new front tires then go to Ford with recommendations I have from the local Mustang expert shops to change the EPAS rack.
Wish me luck cause forum history says I have an up hill battle with Ford on this.
