Swaync11
Member
Hello,
I have a 2004 ford expedition 4.6 2x4 with no traction control. Last year we put new brake lines on because they were so rusted we had a leak. This year all of a sudden we were going through brake pads in the rear driver side so we put on a new caliper. Started it up and the brake pedal went to the floor. We bled the brakes several times and we would get a pedal once bled as long as it was shut off. As soon as you would start it the pedal would go to the floor like there was no resistance. if you drove it and pumped the pedal while stopping it would eventually gain pressure and give a better pedal but as soon as you let up and went to stop again you would have to pump it all over again to get a pedal. You would have to plan out your stops even further. I read a million posts about adjusting the rod in the brake booster, but this particular truck has the nipple at the end so it can not be adjusted. We then decided to get a new brake booster and while we were at it we decided to get a new master cylinder (we did have an abs light on). We installed the parts and bled the brakes, once again great pedal when off then no pedal when started. We then tried to bleed the abs module and pumped again, same thing pedal when off none when on. Went out and bought a better OBD II reader to read the abs code. The code was only for a right wheel speed sensor, C1165. The only other thing we thought it could be was the abs module, so i took a picture of it and ordered one that i thought was the correct part, the last letters on the part were AG and i Thought it was AC the new part was AA. When i tried to look up the part a whole catergory came up as AA-AG so naive me assumed all of these combinations put into one catergory meant they were all compatible, i am not sure that this is the case. Anyway, ordered and recieved the part put it in the vehicle, bled the lines, pedal when it was off and then right to the floor when i started it (mind you this whole time if you unhooked the check valve from the vacuum line (on booster) and pressed it was excellant pedal, we are also getting a P0401 code so I thought well maybe vacuum at one point is affecting it, but it had no vacuum and got hard? ) I then read about forscan and reprogramming the abs module. So i didn't lose hope and ordered forscan. I copied the original data from the original part and programmed it into the new module, and then still got the same code! i only deleted the dtc log and not reset it though......i am at a loss and can not find anything specific to my truck. Dealership wants to charge me up to $300 to program/bleed it and i have way too much $$ and time already invested in it myself to drop another $300.....PLEASE PLEASE Help! Thank you...BTW there were never any leaks found.
I have a 2004 ford expedition 4.6 2x4 with no traction control. Last year we put new brake lines on because they were so rusted we had a leak. This year all of a sudden we were going through brake pads in the rear driver side so we put on a new caliper. Started it up and the brake pedal went to the floor. We bled the brakes several times and we would get a pedal once bled as long as it was shut off. As soon as you would start it the pedal would go to the floor like there was no resistance. if you drove it and pumped the pedal while stopping it would eventually gain pressure and give a better pedal but as soon as you let up and went to stop again you would have to pump it all over again to get a pedal. You would have to plan out your stops even further. I read a million posts about adjusting the rod in the brake booster, but this particular truck has the nipple at the end so it can not be adjusted. We then decided to get a new brake booster and while we were at it we decided to get a new master cylinder (we did have an abs light on). We installed the parts and bled the brakes, once again great pedal when off then no pedal when started. We then tried to bleed the abs module and pumped again, same thing pedal when off none when on. Went out and bought a better OBD II reader to read the abs code. The code was only for a right wheel speed sensor, C1165. The only other thing we thought it could be was the abs module, so i took a picture of it and ordered one that i thought was the correct part, the last letters on the part were AG and i Thought it was AC the new part was AA. When i tried to look up the part a whole catergory came up as AA-AG so naive me assumed all of these combinations put into one catergory meant they were all compatible, i am not sure that this is the case. Anyway, ordered and recieved the part put it in the vehicle, bled the lines, pedal when it was off and then right to the floor when i started it (mind you this whole time if you unhooked the check valve from the vacuum line (on booster) and pressed it was excellant pedal, we are also getting a P0401 code so I thought well maybe vacuum at one point is affecting it, but it had no vacuum and got hard? ) I then read about forscan and reprogramming the abs module. So i didn't lose hope and ordered forscan. I copied the original data from the original part and programmed it into the new module, and then still got the same code! i only deleted the dtc log and not reset it though......i am at a loss and can not find anything specific to my truck. Dealership wants to charge me up to $300 to program/bleed it and i have way too much $$ and time already invested in it myself to drop another $300.....PLEASE PLEASE Help! Thank you...BTW there were never any leaks found.
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