Ok so i replaced the fuel pump and ran fine for couple days. Then went out to leave girlfriends house last night and it wouldnt start. I made sure the wire was still connected to the fuel pump n was. I switched the relay with ac since they are same relays. Still wont start. Anyone have an idea of whats wrong? I was thinking maybe the computer is bad? I just did a tune up in march i dont think its that. Please help!

 

Are you getting spark?

 

Is it cranking at least?
Check the fuses to eliminate that possibilty. Check for voltage at the pump. If voltage is present then check for fuel pressure, unless you have a gauge u will need to rent one. If its holding steady, then i'd check for spark. I'm not sure though as to what psi you should be looking for.

Sent from my htc evo on the Cherokee Forum app. I haz teh technologiez

 

Where would u check voltage at the pump? I will give everything a try

 

Don't assume anything.

The #1 thing to do with a no-start is check for spark.

Pull a spark plug, keep it attached to the plug wire, place the plug electrode near a good engine ground. Have a buddy crank the engine while you watch.

You are looking for a strong, blue, snapping spark. Yellow/orange/white indicates a weak spark, which may not be strong enough to start the engine.

If (and only if) spark checks out, then try spraying a small amount of starting fluid into the intake. If the engine starts and runs for a little bit then you have confirmed a FUEL DELIVERY problem.

The above simple tests will help you isolate the root cause of your no start.

Good luck and let us know what you find!