I did find it on Kijiji.. This was taken during the summer. It's sludgy in there, but the engine purrs. I think the low oil pressure is from the leak.

 

Should I do a engine flush or will it do more damage than good?I have a 96 with 234,800 miles

 

What do you guys use when you install led bulbs up front I'm currently running Sylvania 6k led bulbs and my cluster markers are slightly on which bugs me at night already tried 25 watt resistors which was what Sylvania recommended and made problem worse anybody had the same situation

 

Not real strong on the OBD-I stuff but the following sensors can cause problems when the engine is warmed up if they're reading wrong:
- O2 sensor
- Engine Coolant Temperature sensor
- Intake Air Temperature sensor

The O2 sensor is a regular maintenance item, and should be changed out every 60,000-80,000 miles or so. NTK is the OE brand.

As for the sensors, you can test them with a multimeter. Get the Jeep up to temperature, set a multimeter to resistance (or I guess use an ohmmeter), and compare to this chart:



Note that the temperature gauge on your dash uses a separate probe from the computer.

If you haven't done it yet, now would be a good time to clean the connectors for all sensors and take a good look at the grounds.

All 4.0Ls purr, until they throw a rod. Then they don't make a very nice noise. lol. In the valve cover is not a good place to look as atmospheric moisture condenses and causes a milky look. You want to check the dipstick, or even better, drain a bit of oil for examination. If that stuff is milky you have a real problem.

Why would you do an engine flush? Do you have sludge?

 

No sludge with that many miles?????Huh..What should I check?oil change,plugs...?

 

herp,derp,jerp..

 

Hey all just wondering about some basic engine upkeep besides fluids what else should I check regularly under the hood(or elsewhere) to make sure all stays well? I've owned my Jeep 3 years now and I am ready to start taking care of everything or as much as I can myself. Feel free to PM instead of cluttering the thread if you want.

 

Well you tell me! It's your Jeep! Pop the valve cover off and take a look

All filters, all fluids, and replaceable ignition components are a good start. Cleaning electrical connections (particularly grounds) and checking for vacuum leaks is also wise.

Hoo boy. There's so much to say here. Have you tried searching? There are tons of maintenance things to do. Are you including the cooling system and transmission in your list of fluids? Greasing the steering and U joints?

 

You commented on my other post haha hopefully I get it. And I literally have no idea where to start I guess is my issue. What's the 3 big things to check and I guess I'll go from there. I'll do a "Engine Maintenance" and "Maintenance" search and see what pops up. I have tomorrow off to work on the jeep if I can so yea. haha

 

Any body that can help me on my led bulb problem?

 

2000 cherokee 4L. No heat. Hoses are hot, fan works fine, switches from
defrost to dash to floor ok.

This seems to be a Heater Control Valve but I cant find a replacement
anywhere.

There is a tag and check valve that says EVAP Service Port.1 psi max
Do I need to pressurize it??

 

that is not a HCV. Your jeep don't have it. Maybe the heater core is clogged?

 

The hose above and below the core are hot.
Water is running through the core.
I dont have an HCV? That explains why I couldn't find one.....

 

factory eliminated it in 1996/1997

 

Used the search button and found a thread that suggested this to check the valve on the intake manifold

"Take your check valve off.
Hold it how it in the orientation it was in while attatched to the engine.
Put the intake manifold side into your mouth, and suck. (giggity)
If it doesn't suck, it's either bad or the wrong way.
Repeat for the otherside.
Spit on ground multiple times to get nasty taste out of your mouth."

According to this my valve is good. not sure the reliability though. Still no cruise function.

How do i go about checking the seal on the rest of the vacuum hose?