Hello all, I have a 92 dodge dakota with a 3.9 v6. I am having problems with my brakes, the pedal is fine most of the time but sometimes especially on a hill or at low speeds the brake gets very hard to push. I have put a new master cylinder on it and a new brake booster. I have also checked all the brake pads and they are fine, at this point I am stumped so any ideas you guys can give me will be appreciated. thanks.

 

Welcome to the site. I will move this thread to the first generation Dakota section,
FF

 

You may have a vacuum leak. Check your vacuum lines.

 

I have checked the vacuum lines and I can't find a leak does anyone have any other ideas. Once again my brakes work fine driving down the road but if you are at low speeds or stopping on a hill the pedal gets real hard to push. Any ideas would be appreciated

 

have you checked the brake pedal linkage? Might be a dry pivot point binding.

 

Ok, so I have a new problem. The truck is running a little weird and sometimes when you stop it will die and then the check engine light will come on. If you shut it off and start it back the check engine light goes off. i have run the code and it keeps coming up 02 sensor but i have changed it twice and reset the computer both times. I have no idea what is going on. Thanks for any help.

 

If its telling you the 02 and it is not the sensor then it is the wires. Check the wires!

 

a vacuum leak sounds possible, i know you said you replaced the booster, but if you went cheap on it it may be leaking internally, its possible for a vacuum leak to throw an 02 sensor code, dtc's just point you in a direction o2 code dosent always mean its the sensor.

 

Thanks to everyone for the ideas, i will try those things and see what happens. If anyone has anything else, please let me know.