Hey all, I've searched and searched and have gotten alot of info. When my cherokee(96 auto, 178,000mi) starts I'll run it and it'll just die. I can crank it but no start. I pumped the crap out of the pedal and it'll start real rough. But won't stay running all the time. I replaced the fuel pump already to no avail. I've read anything from CPS to injectors. Any ideas why it'll start if i pump it but won't stay running?

 

what do you do when you start it? do you let it try to idel or keep your foot on the gas?

 

it really does sound like cps but usually it will accualy start if you let it sit a couple hours. hmmm let me look around real quick.......

 

Shep-it will run rough for a few seconds then 'kinda' stabilize but it doesn't seem to idle on it's own. I know that's a little vague but thats all I got so far. Like I said I read enough to think it's the cps I just need someone with actual experience to tell me thats what it is. This is my only mode of transportation and I couldn't get to a parts store today so saturday I'll prob just pick one up. 00XJ-It did start the next morning like normal but I shut it off and couldn't start it again. Thanks for your replies. I appreciate it

 

ya that deff. sounds like the cps... if thats what it is have fun fixing it its a PITA but its do-able.

 

this may sound weird but my 95 was doing that and i replaced the ignition coil and it fixed it

 

that would make sence but sometime them things are pricy as mess

 

i think i payed like $15-$30 its a long shot of price but im not really that sure

 

ya kinda depends on who you know my broa mechanic can get em for dirt cheap.

 

sounds like either ur fuel pump or crank sensor best of luck

 

yeah true mine was autozone special

 

Thanks guys. Since i replaced the furl pump and nothing changed I'm hoping the cps does the trick. Will update on sat or sun.

 

if that doesnt work seriously try the ignition coil

 

I thought the CPS was a "safety" device If it did not sense movement of the flywheel it will not allow
1) Spark
2) Fuel at the injector
If its the CPS it won't start.
I would check the fuel lines and did that year have a fuel pressure regulator ?

 

Autozone can test the CPS so ur not wasting your money. On your fuel rail you have an bleeder like an tire stem make sure that u have fuel presure. It should shot gas out if it doesn`t then you have fuel problems if it does then check spark. If the CPS goes out then ur engine won`t start. Plus make sure that ur vacume line is hooked up to ur fuel rail. That regilates ur fuel presure.