Brake pedal drift
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Mountain Pass
Joined: May 2015
Posts: 221
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From: Northeast Ohio
Brake pedal drift
2002 F-150 4x4 w/ 5.4 v-8. Brake pedal goes half way to floor before it starts to stop the vehicle. I have replaced and bled the master cylinder, bled out all of the calipers, and the calipers are installed correctly because the bleeder screws are at the top on all of them so no air can be trapped up there. The truck seems to stop fine, but just takes more pedal to get it to start stopping than I'm comfortable with. Could the ABS unit need bled out too? Or could it be an adjustment issue with the booster rod?
Also, something else I noticed, and it may be related..the ABS unit usually makes a slight clanking sound (like someone kicking a metal garbage can) a couple seconds after the key is turned on. I know its the ABS unit because a couple weeks ago I had a friends scanner hooked up to the truck, and I went into the ABS computer to clear the codes (have ABS light on from what I found to be a bad sensor wire on the front drivers side according to the scanner) and as soon as i cleared the codes on the ABS, it made that sound. I don't know if maybe there is something wrong with the ABS actuator, or if it's related to the brake pedal issue.
Also, something else I noticed, and it may be related..the ABS unit usually makes a slight clanking sound (like someone kicking a metal garbage can) a couple seconds after the key is turned on. I know its the ABS unit because a couple weeks ago I had a friends scanner hooked up to the truck, and I went into the ABS computer to clear the codes (have ABS light on from what I found to be a bad sensor wire on the front drivers side according to the scanner) and as soon as i cleared the codes on the ABS, it made that sound. I don't know if maybe there is something wrong with the ABS actuator, or if it's related to the brake pedal issue.
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