Jeep GC troubleshooting cranks but won't start


Asked by Nov 02, 2014 at 03:55 PM about the 2005 Jeep Grand Cherokee Limited 4WD

Question type: Maintenance & Repair

Cranks but won't start.  WHY?  ECM bad.  CPS bad. Fuel pump bad.
Cranks strong, battery 18 months old and trickle charged - OK.  
ASD and Fuel pump relay click in.  Voltage test shows relay is activated.
Spraying starter fluid into intake manifold and engine runs fine.  
Therefore no fuel or fuel injectors not opening.
No fuel? - is pump getting enuf amps (shud be 8 amps). Fuel pump relay shud be
activated for @2 secs before ASD relay will shut it down if CPS is bad.  (I don't know if
CMS will shutdown via ASD or simply run rough.) Do any other sensors input into ASD
which can cause Fuel pump relay to switch off. BTW put in new No. 6 and  No. 15 fuses.
I don't see amperage on Orange wire output from Fuel pump relay and don't hear fuel
pump priming or smell fuel (yes tank is 3/4 full).  Also installed new FP and ASD relays
as cheap fix, assuming new relays are not defective.  Has anyone built a causal mapping
to aid in troubleshooting a "crank but won't start" condition?  BTW2 dealer had this for 2
days and didn't find a any codes but I had CPS replaced just in case and it ran for 4
weeks but not running for last 2 weeks after my son took it 4WD- it ran fine all day then
wouldn't start after returning home and hosing mud off undercarriage.

1 Answer


I would double check all the fuses. Also with some relays they are making and breaking the negative side of the circuit. Just a thought.

Your Answer

Add photo

Related Questions

  • Jeep starts but shuts off. 18 answers

    I replaced the batt in my 94 GC and now it won't stay running and the security light flashes how can I fix it?

    1994 Jeep Grand Cherokee


    Maintenance & Repair

  • jeep grand cherokee almost cranks doesnt turn over 10 answers

    My 1999 Jeep GC stalled on me recently and would not start. It almost cranks but will not turn over and start. I put oil, gasoline and replaced the #12 fuse bc I found this information online, and sti...

    1999 Jeep Grand Cherokee Limited


    Maintenance & Repair

  • Jeep Grand Cherokee 1 answer

    I'm in need of help! My 93 jeep GC straight 6 4.0L died on me while driving home, it sounded as if it ran out of gas, I added gas, tried to start it wouldn't turn over. Now because of having a baby...

    1993 Jeep Grand Cherokee Limited 4WD


    Maintenance & Repair

  • 97 Jeep GC Limited turns over but not firing!

    I have been going crazy trying to figure this out! The car will crank lile normal, but will not fire. So heres what i have done: brand new battery(started right up. Ran for a week then started stall...

    1997 Jeep Grand Cherokee Limited


    Maintenance & Repair

  • Jeep Wrangler TJ 2001 -cranks but won't start 6 answers

    This has gone on for months. The Jeep just died one day and starts when it wants to. Usually cranks but won't start. Changing computer didn't help. Gas gauge doesn't work but will work if the vehic...

    2001 Jeep Wrangler SE


    Maintenance & Repair

Search Jeep Grand Cherokee Questions

Jeep Grand Cherokee Experts

#1 inuevafreak
Reputation 1,780
#2 Tom Demyan
Tom Demyan
Reputation 1,610
#3 thejeepdoctor
Reputation 1,470
View All

Related Models For Sale

Used Jeep Wrangler"
464 Great Deals out of 16,413 listings starting at $3,400
Used Ford Explorer"
1,371 Great Deals out of 71,753 listings starting at $300
Used Toyota 4Runner"
366 Great Deals out of 18,996 listings starting at $2,200
Used Dodge Durango"
408 Great Deals out of 22,641 listings starting at $1,400
Used Chevrolet Tahoe"
1,076 Great Deals out of 36,075 listings starting at $1,700
Used Dodge Charger"
646 Great Deals out of 29,674 listings starting at $2,275
Used Ford F-150"
3,271 Great Deals out of 216,650 listings starting at $1,500
Used Chevrolet Silverado 1500"
2,447 Great Deals out of 144,777 listings starting at $1,995
Used Jeep Liberty"
369 Great Deals out of 9,209 listings starting at $998
Used BMW X5"
550 Great Deals out of 15,637 listings starting at $1,995
Used Ford Mustang"
737 Great Deals out of 41,065 listings starting at $900

Used Cars For Sale

2017 Jeep Grand Cherokee Limited 4WD For Sale
8,022 listings starting at $33,640
2016 Jeep Grand Cherokee Limited 4WD For Sale
3 Great Deals out of 4,625 listings starting at $31,983
2015 Jeep Grand Cherokee Limited 4WD For Sale
88 Great Deals out of 2,155 listings starting at $23,999
2014 Jeep Grand Cherokee Limited 4WD For Sale
140 Great Deals out of 2,880 listings starting at $15,980
2013 Jeep Grand Cherokee Limited 4WD For Sale
12 Great Deals out of 239 listings starting at $17,199