1. '96 Cherokee Cold Temp Start Issue

    This winter, my 1996 Cherokee Sport developed a cold temperature start problem. If overnight temps are below 50 degrees or so, the engine cranks just fine but without firing. If I pump the accelerator, while doing short cranking bursts, it eventually roars to life. Of course being fuel injected, I have no idea if the pedal pumping is really affecting the start. Sometimes after this type of start, the engine will not idle until it warms up. When temps are warmer, the cold engine always starts right up like normal. No vacuum leaks are apparent, and the Manifold Air Temp Sensor seem to check out as OK. Sound familiar to anyone?

  2. #2
    Join Date
    Feb 2009
    Location
    Dayton Ohio Area
    Posts
    5,942

    Re: '96 Cherokee Cold Temp Start Issue

    Check fuel pressure key on and off and while it is running. Should be constant.

    Check spark to the plugs.


    Sent from my iPhone using Jeepz.com mobile app
    "Never look down on anybody unless you're helping him up" - Jesse Jackson

  3. #3

    Re: '96 Cherokee Cold Temp Start Issue

    After a year with the problem getting worse, and replacing plugs, wires, cap, and rotor, and noting fuel pressure irregularities, I replaced the ECU. Fixed!

  4. #4
    Join Date
    Feb 2009
    Location
    Dayton Ohio Area
    Posts
    5,942

    Re: '96 Cherokee Cold Temp Start Issue

    Glad to hear you repaired it.


    Never look down on anyone unless you are helping them up - Jesse Jackson
    "Never look down on anybody unless you're helping him up" - Jesse Jackson

  5. #5

    Re: '96 Cherokee Cold Temp Start Issue

    Thanks for checking back on this . . . however . . I think the timing chain just broke. I'm almost to the chain, and should get the cover off tomorrow. Do you, by chance, know if this 4.0 inline 6 is an "interference" engine? At 265,000 miles, I'm not likely to tear the motor down to check for damage. Thanks, again. TJ

  6. #6
    Join Date
    Feb 2009
    Location
    Dayton Ohio Area
    Posts
    5,942

    Re: '96 Cherokee Cold Temp Start Issue

    I do not believe it is an interference engine.
    Also these chains stretch but do not normally break. The engines have been known to go 500k mi with no chain issues. Pics if it did.


    Never look down on anyone unless you are helping them up - Jesse Jackson
    "Never look down on anybody unless you're helping him up" - Jesse Jackson

  7. #7

    Re: '96 Cherokee Cold Temp Start Issue

    Thanks. I'll post a picture if it's broken.

Similar Threads

  1. Transmission over temp issue...is back again, help?
    By laredo2006 in forum Cherokee, Commander, Wagoneer and Liberty
    Replies: 2
    Last Post: 04-27-2015, 09:13 PM
  2. cold start
    By j gonzalez in forum Cherokee, Commander, Wagoneer and Liberty
    Replies: 3
    Last Post: 01-29-2015, 01:31 AM
  3. 98 Wrangler (Trans issue when Cold)
    By my98jeep1970 in forum Wrangler and CJ
    Replies: 18
    Last Post: 12-11-2013, 03:50 PM
  4. Cherokee cold start, chocking problem
    By deesweet in forum Cherokee, Commander, Wagoneer and Liberty
    Replies: 23
    Last Post: 03-20-2007, 02:51 PM
  5. Cold second start?
    By Kevin72 in forum Cherokee, Commander, Wagoneer and Liberty
    Replies: 1
    Last Post: 07-20-2003, 08:00 PM

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