1995 Jeep Grand Cherokee Sport it just won't start. It cranks, that's it. It was running fine yesterday.

replace your idle air control valve located back of the throttle body.

Your Jeep has what's known as the delayed start, no check engine light problem. The Jeep will not start until the check engine light comes on, on the dashboard. Next time it cranks but will not start, look at the dashboard to see if the check engine light is illuminated. If it's not lit up, then your Jeep does have that problem and your Jeep ecu is in need of repair or replacement. There are components inside the ecu that are going bad and will continue to get worse, eventually leading to a permanent no start condition. There are ecu repair services and replacement ecus on ebay.

it is your air idle control valve witch is located on the back of the throttle body..

sounds like maybe you need a starter... if you take it out you can take it to any auto parts store and they can test it for free.

Could be the crank sensor is bad but If the check engine light does NOT come on when cranking at the times when it won't start, then your ECU is in need of repair. The engine will only start after the check engine light comes on and the ecu is what controls that. It's likely going bad, causing the delayed start problem typical of early 90's jeeps. Repair or replacement services for your jeep ECU are available on ebay.

crank shaft sensor just had this prob its located on top of trans

I have a 1995 Jeep sport it crank but wont start I dont know what it could be

Hi Roger, Sounds to me as if you may have a problem with the anti theft unit in your vehicle. A diagnostic scan would help greatly to pin point the problem. Regards John

if the blower is constantly running it sounds like u have a fused wire allowing the blower to run directly off the battery?