Brakes
#1
Newbie
Thread Starter
Join Date: Jan 2009
Posts: 22
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1990
Model: Cherokee
Engine: 4.0
Brakes
What do you suppose it is when, I mash on the brakes and they don't have enough stopping power? Pads are good, It feels like there is good pressure, They work O.K. around the city but if I have to mash on 'em it doesn't stop hard. It doesn't feel like an abs problem or anything.
#5
CF Veteran
what size tires are on it? mine does the same. i've tried bleeding them out many different ways. even did the transfusion thing.
but just remember not to drain the MC dry or you'll have to bench bleed it.
but just remember not to drain the MC dry or you'll have to bench bleed it.
#6
CF Veteran
Join Date: Mar 2008
Location: South Side Chicago
Posts: 2,088
Likes: 0
Received 2 Likes
on
2 Posts
Year: 1992, 2- 1998 (All 3, 4 Doors)
Model: Cherokee
Engine: 4.0L in all
Sounds to me like it the typical XJ brakes... I'd check the rear brakes first, those wear out and you can barely notice, but all during that time, you're taxing the front brakes harder and harder, and they're not all that to begin with. I'd probably be willing to bet the front brakes are a bit glazed over too...
#7
Member
Join Date: Jan 2009
Location: Fayetteville
Posts: 138
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1992
Model: Cherokee
Engine: 4.7L stroker with 99+ intake
Does your XJ have ABS? If it does the ABS pump and actuator are covered for life. If it doesn't swap in a later model booster and master cylinder I believe 94 and later have the dual diaphram boosters.
Since swapping the ZJ rear disks in mine stops alot better, but still not as good as I want so I'm going to be upping the size of the front brakes to the WJ brakes and steering.
Since swapping the ZJ rear disks in mine stops alot better, but still not as good as I want so I'm going to be upping the size of the front brakes to the WJ brakes and steering.
Trending Topics
#8
Junior Member
Join Date: Jan 2009
Posts: 33
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1997
Model: Cherokee
Engine: 4.0 Straight Six
Side question-what do you mean the ABS are covered for life? Some sort of Daimler/Chrysler warranty or how do you mean? Interested to know...
#9
Member
Join Date: Nov 2008
Location: Dallas
Posts: 165
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
I'm supprised that no one mentioned the power brake booster. Maybe it doesn't have one because of the ABS? Some Fords are like that- the M/C bolts up to the hydrocomputer/electronic booster. (not to be confused with GM hydroboost- from the P/S pump)
If you have power brakes- and I'm sure you do- if it requires massive amounts of pedal pressure to get it to stop...look at the vacuum assist/ power brake booster (it's the black round thing the M/C bolts up to. Also check the little black 90* one way valve that the vacuum line runs into- vacuum can come in, but not out. pull if off and suck on it.
A way to test the diaphragm inside would be to let the engine run and build vacuum. Shut it off, wait a while (maybe 30 minutes), go back in, and press the pedal down. You should hear a whoosh sound- it's vacuum escaping. This will tell you if the diaphragm has a cut it it. If you don't hear it, it COULD be bad. A bad booster can have two different sypmtoms.
I had one go out on my 84 Cheif- and it was like a push button vacuum leak- push the pedal down, and the engine would start running like crap. It still worked, however.
If you have power brakes- and I'm sure you do- if it requires massive amounts of pedal pressure to get it to stop...look at the vacuum assist/ power brake booster (it's the black round thing the M/C bolts up to. Also check the little black 90* one way valve that the vacuum line runs into- vacuum can come in, but not out. pull if off and suck on it.
A way to test the diaphragm inside would be to let the engine run and build vacuum. Shut it off, wait a while (maybe 30 minutes), go back in, and press the pedal down. You should hear a whoosh sound- it's vacuum escaping. This will tell you if the diaphragm has a cut it it. If you don't hear it, it COULD be bad. A bad booster can have two different sypmtoms.
I had one go out on my 84 Cheif- and it was like a push button vacuum leak- push the pedal down, and the engine would start running like crap. It still worked, however.
#10
Member
Join Date: Aug 2008
Location: Sticks, NC
Posts: 174
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1994
Model: Cherokee
Engine: 4.0
Usually after i check my brake fluid i adjust the rear brakes, either with a drum brake adjustment tool, or by finding a big steep hill i can back down and jab them hard and tight. That usually makes a discernible difference in feel. Good Luck!!
Thread
Thread Starter
Forum
Replies
Last Post
Bearstream
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
6
11-04-2022 10:19 AM
Westonbc
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
3
09-22-2015 08:23 PM
mange1234
Cherokee Chat
2
09-19-2015 07:15 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)