your oil pump is bad
bad fuel filter
Bad Struts
There are several things that can cause heater problems in your 1998 Jeep Grain Cherokee. The most common cause of heater problems is low fluid in your cooling system.
Perhaps thermostat is not opening
New lifters or repairing the cause of low oil pressure.
Yes, it is very normal to have head pressure when you need to get your molars out. Teeth pain can cause a lot of pain in your head.
A typhoon is a cyclone. A cyclone is simply an area of low pressure. Types of cyclones include, but are not limited to, hurricanes/typhoons, low pressure systems and tornadoes.
The most common problem is with the blend doors. Check heatertreater.net for diagnostic information and an inexpensive fix.
Arteries, cause they are large vessels coming right from the pump of the heart (the left ventricle).
It goes up while driving and down when you're idle....that's normal
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
Clogged fuel filter, dying fuel pump, or possibly fuel pressure regulator.