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10-26-2010, 07:06 AM
#1816
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Join Date: Sep 2010
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Year: 1990
Model: Cherokee
Engine: 4.0
Ok so I have looked around the site a bit and couldn't find much on abs brake problems. So, I have just recently bought a 1989 XJ Limited with power and anti lock breaks. The abs light is on and my breaks hardly work at all. So i replaced the abs pump. No difference. So now im wondering if it is a booster problem because I get no pressure in the pedal when the engine is off. Any ideas on how to fix it? I have looked into new master cylinders, but i dont really want to spend $450 for it if it is an easier fix. What do you think? Thanks again!
Ben
Ben
10-26-2010, 08:07 AM
#1817
☠ CF Sheriff ☠
You could but from many people on this site's experience, blocks are both dangerous and provide a much poorer ride than stock. Look into an add-a-leaf if you want to even the lift out.
10-26-2010, 08:12 AM
#1818
☠ CF Sheriff ☠
How do you plan on "upgrading" the blower motor? Are you just talking about replacing it? Here is a guide to replace the motor:
http://www.lunghd.com/Tech_Articles/...ower_Motor.htm
If the fan only works on off/high (no speeds in between), you have a bad resistor pack, not a bad blower motor.
http://www.lunghd.com/Tech_Articles/...ower_Motor.htm
If the fan only works on off/high (no speeds in between), you have a bad resistor pack, not a bad blower motor.
10-26-2010, 08:44 AM
#1819
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Join Date: Mar 2010
Location: Broward County Fl.
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Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
How do you plan on "upgrading" the blower motor? Are you just talking about replacing it? Here is a guide to replace the motor:
http://www.lunghd.com/Tech_Articles/...ower_Motor.htm
If the fan only works on off/high (no speeds in between), you have a bad resistor pack, not a bad blower motor.
http://www.lunghd.com/Tech_Articles/...ower_Motor.htm
If the fan only works on off/high (no speeds in between), you have a bad resistor pack, not a bad blower motor.
10-26-2010, 09:30 AM
#1820
☠ CF Sheriff ☠
there aren't any upgrade options for the blower motor. It's likely that the fan has slowed down / become clogged with age, and simply needs to be replaced. I'm sure you will see a large improvement by just replacing the fan assembly with a new OEM one.
10-26-2010, 11:02 AM
#1823
☠ CF Sheriff ☠
there isn't any way to upgrade the fan for more volume, the passageways would need to get bigger as well, and the fan would need to get bigger. There is no way to effectively do this. It's a principle of fluid/flow dynamics - a faster speed just leads to more turbulence, not more air flow volume. You would need bigger air duct and a larger fan diameter to move more air. The air passageways in our jeeps is not exactly smooth and with nice bends either - which is the primary cause of our air flow problems.
10-26-2010, 11:07 AM
#1824
☠ CF Sheriff ☠
another thought - since you replaced the blower already, you didn't happen to reverse the wiring connection did you? It's easy to do and would cause a low air volume condition. Try rotating the plug 180* and see if it fixes the problem. You wouldn't be the first that has had that happen
10-26-2010, 11:32 AM
#1825
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Location: Broward County Fl.
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Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Before you drop a ton of cash, go over every inch of brake line and make sure there are no leaks. Then, COMPLETELY bleed the entire brake system (gravity bleed or brake fluid pump AKA brake flush machine), including the ABS motor. Some of these systems are a royal pain in the a$$ to get all the air out. If the pedal still drops, then replace the booster...
10-26-2010, 11:43 AM
#1826
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Location: Broward County Fl.
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Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
another thought - since you replaced the blower already, you didn't happen to reverse the wiring connection did you? It's easy to do and would cause a low air volume condition. Try rotating the plug 180* and see if it fixes the problem. You wouldn't be the first that has had that happen
10-26-2010, 11:58 AM
#1827
Senior Member
Join Date: Oct 2010
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Year: 1995
Model: Cherokee
Engine: straight 6
So I changed my oil the otherday. well prolly like 3 weeks ago, I only put 5 qts in it and low and behold it needs .7 quarts low. And now my oil pressure is high. Around 60-70. And now there is a lil knock towards the back of the engine. What could it be?
10-26-2010, 12:01 PM
#1829
☠ CF Sheriff ☠
Oil pressure is typical. Mine usually hovers around 60-70 when cold and when under load, drops to about 20-30 at stop lights (when warmed up).
Knock is probably lifter tap - also typical on these engines, especially when cold.
10-26-2010, 02:16 PM
#1830
Newbie
Join Date: Oct 2010
Location: Arkansas
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Year: 1995
Model: Cherokee
Engine: 4.0L HO
Ok, so lately i have noticed that sometimes my (auto transmission) jeep acts as if it is not completely "engaged" in drive. The only way i know to describe it is like this; from a complete stop, when i hit the gas the engine will rev like i am in neutral but not accelerate. After a second or two it will click/thump (like it just went into drive) and then it will drive normal. What is this?