How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Dan Your Own Question
Dan, Technician
Category: Jeep
Satisfied Customers: 23943
Experience:  Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
Type Your Jeep Question Here...
Dan is online now
A new question is answered every 9 seconds

Jeep wrangler starts and runs great but then dies out after

Customer Question

Jeep wrangler starts and runs great but then dies out after driving for 20 minutes.... when I try to restart the engine cranks but wont start. If I let it sit for 30-50 minutes it will start right up and run great.1994 Jeep Wrangler 4.0, automatic,***** 119000 miles.
Submitted: 11 months ago.
Category: Jeep
Expert:  Dan replied 11 months ago.

Hello my name is***** is a common symptom of a failing fuel pump. Next time it doesn't start check to see if it runs on starting fluid if so you know problem is fuel related and I'd just replace pump. This would cost around $300 at a shop, here are instructions to do it yourself. Let me know if you have more questions. Thanks.



Customer: replied 11 months ago.
It does not run on starter fluid... I tried that.
Expert:  Dan replied 11 months ago.

This would mean no spark then which would most likely be caused by coil or crankshaft position sensor. Check to see if check engine light comes on for bulb check when turning key to on position, if not then problem is ASD relay or PCM. If good then Check for B+ to coil positive when cranking. If OK, check the negative side of the coil for toggle to ground. Connect a test light between coil negative and B+. The test light should flash when cranking. If the test light is pulsing, replace the ignition coil.Let me know if you have questions, thanks.