This is a bit of a continuation thread from my previous thread about my cousins truck.
Its a 2003 F-150 Supercrew, 4.6 V8, with cruise control, and disk brakes on the front and rear. This is also the truck that still has a rough idle.
Anyway, teh brakes, he dont have zem. There is virtually no resistance on the pedal. On level ground, with the brake pedal to the fire wall, the truck will barely stop, in fact you have to start slowing down well before getting to a light, and you have to hope. You have to hold the pedal there or the truck will begin to roll forward. If on an incline or decline, forget it. They will slow him, but they wont stop him.
We suspected the brake master cylinder was out, because some power steering fluid accidently got poured in the BMC reservoir. He's pretty sure he got it all out. We removed the BMC, and the seals are still in very nice shape. It was very difficult to push the seal in.
We noticed that in my garage, we can smell burned gas under the cab of the truck. I am starting to believe he has a exhaust leak, and that he is not getting enough oomph to the brake booster, which in turn is not giving him enough power to operate the BMC.
Another friend mentioned a vacuum leak, and that is valid. However in our limited ability we havent detected a vacuum leak. Is there a solid way besides spraying B-12 and listening?
Yet another friend mentioned the EGR valve could be f'ed up. The kid at Auto Zone mentioned this in passing, but his shit head manager overruled him.
HALP! He wants to sell this truck, get as much as he can, so he can buy something more suitable.