1. #1
    joeoc91's Avatar
    joeoc91 is offline Junior Member
    Join Date
    Dec 2014
    Posts
    3

    cranks no start!! HELP

    backround
    2001 tj wrangler 4.0L, 5 speed manual 118,000 miles
    i drove home the other nights and parked behind my bro i left for the night he moved it back 10 ft and foward over a small curb 10ft(w.e) next morning i get in it and it cranks hard, but wont fire......

    i sprayed some starting fluid in it to see if i could get a putter and nothing, so i changed the crankshaft sensor got nothing, changed the cam sensor.. nothing, checked the fuses they're all good. i popped the coil rail off and left a plug in to check for spark and didnt see any!!! im at a loss right now !!

  2. #2
    joeoc91's Avatar
    joeoc91 is offline Junior Member
    Join Date
    Dec 2014
    Posts
    3

    Re: cranks no start!! HELP

    i also hooked a scanner to it and it wasnt reading any pending or hard codes!!

  3. #3
    JPNinPA's Avatar
    JPNinPA is offline Senior Member
    Join Date
    Feb 2009
    Location
    Dayton Ohio Area
    Posts
    4,684
    Verify proper fuel pressure. 45-55 psi - reading should be constant key on thru idle and rev to 3500 rpm

    Verify you have spark

    Verify fuses are good.

    After that the CKP on the transmission does go without notice

    Auto or manual? There is a clutch switch to ensure clutch is released. Also a transmission switch on autos.
    Last edited by JPNinPA; 12-21-2014 at 01:37 PM.
    "Never look down on anybody unless you're helping him up" - Jesse Jackson

  4. #4
    joeoc91's Avatar
    joeoc91 is offline Junior Member
    Join Date
    Dec 2014
    Posts
    3

    Re: cranks no start!! HELP

    i checked spark today and were all good witjh that it has power going to coil rail and the plugs do spark
    i sprayed ether in it today and got it to fire up!
    i tried that 4 tiumes yesterday so i checked the plug on the driver side of the fuel tank and it has momentary power at key on like it should!
    my guess is the fuel pump went bad overnight! i switched around relays and replaced the plugs for safe measure and now ill suppose i drop the tank and ill let you know how that works for me!

  5. #5
    Bounty__Hunter's Avatar
    Bounty__Hunter is offline Moderator
    Join Date
    Nov 2002
    Location
    Southern Illinois
    Posts
    13,425

    Re: cranks no start!! HELP

    Did you try pumping the accelerator while cranking? I know it's not necessary with FI but it has worked for me in the past. Could be a TPS issue.

  6. #6
    JPNinPA's Avatar
    JPNinPA is offline Senior Member
    Join Date
    Feb 2009
    Location
    Dayton Ohio Area
    Posts
    4,684
    Quote Originally Posted by joeoc91 View Post
    i checked spark today and were all good witjh that it has power going to coil rail and the plugs do spark
    i sprayed ether in it today and got it to fire up!
    i tried that 4 tiumes yesterday so i checked the plug on the driver side of the fuel tank and it has momentary power at key on like it should!
    my guess is the fuel pump went bad overnight! i switched around relays and replaced the plugs for safe measure and now ill suppose i drop the tank and ill let you know how that works for me!
    Turn the key on and put a gas pressure gage on the Schrader valve before dropping the tank.
    http://www.youtube.com/watch?v=knE_J8xc3hk&sns=em

    Also try turning your key on for 5 sec, then off , then on for 5 sec then start.
    Last edited by JPNinPA; 12-21-2014 at 05:39 PM.
    "Never look down on anybody unless you're helping him up" - Jesse Jackson

Similar Threads

  1. HELP:no check engine light no start
    By jakejeeper in forum Jeep Electronics and Audio
    Replies: 4
    Last Post: 07-21-2011, 01:30 PM
  2. crank no start
    By registration45 in forum CJ YJ TJ and JK
    Replies: 3
    Last Post: 03-31-2010, 10:46 PM
  3. Cherokee cranks over no start ,no gauges
    By scottz in forum Cherokee, Commander, Wagoneer and Liberty
    Replies: 2
    Last Post: 10-10-2007, 11:19 PM
  4. 1994 Jeep won't start--Help!!!!
    By jprtroy in forum CJ YJ TJ and JK
    Replies: 5
    Last Post: 07-20-2003, 07:00 PM
  5. no start...need help!
    By PASmokeater in forum CJ YJ TJ and JK
    Replies: 6
    Last Post: 07-20-2003, 07:00 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Log in

Log in