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Old 01-17-2014, 03:40 PM   #1
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please help I'm stumped..cranks no spark

I have a 97 2.5 manual. The other day my Jeep would not start ,so I jumped it off and took it to the garage to test the battery.it read 49 out of 660 cca. Got a new battery and now it won't start. And the gauges won't pop up. I replaced the CPS and still nothing. Any suggesting would be nice

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Old 01-17-2014, 05:31 PM   #2
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So it started fine when you jumped it? But not with a new battery?

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Old 01-17-2014, 05:38 PM   #3
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If the gauges don't even pop up, did you install the battery correctly? It sounds like you don't have any juice at all......
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Old 01-17-2014, 05:40 PM   #4
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Exactly where I was going with my questions. It seems that the battery is not hooked up right, or it's a dead battery that was thrown in there.
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Old 01-17-2014, 06:06 PM   #5
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The terminals are right and tight.the lights AC fan turn finals all work its just not getting any spark
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Old 01-17-2014, 06:08 PM   #6
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I even put the jump box on it and it turns over it just won't fire up.
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Old 01-17-2014, 06:18 PM   #7
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Did you check fuses?

If the gauges aren't coming on maybe you blew the fuse for the ignition circuit. Would explain the no spark and no gauges....
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Old 01-17-2014, 06:53 PM   #8
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Would that fuse be under the hood or behind the glove box
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Old 01-17-2014, 06:54 PM   #9
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Those larger ones are under the hood in that distribution block in front of the battery. I'd start there.
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Old 01-17-2014, 07:17 PM   #10
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The ones under the hood are labeled on the cover. I'd check anything that sounds like ignition/cluster/PCM/etc....
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Old 01-18-2014, 10:58 PM   #11
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Ignition coil?
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Old 01-19-2014, 11:44 AM   #12
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try removing both battery cables and cleaning both cables and battery post until shinny then reinstall them in the correct locations
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Old 01-20-2014, 03:30 PM   #13
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I cleaned the terminals and checked all the fuses and they are all good any other advice
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Old 01-20-2014, 03:52 PM   #14
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98 and I think 97 is the same coil gets plus 12 volts via a furs in the box under hood

Then PCM pulses coil ground to make spark

But easy check is pull wire plug off coil (not big wire to distributor) but plug with 2 wires, and with key on make sure meter or testlight shows 12 volts to battery ground on one of the 2 wires in that plug off the coil

If it does problem is not power to coil

Most likely poor body ground stoping lights gauges and ability of PCM to supply pulsing ground to fire coil

Easy test run a good big jumper from battery ground to a bright shiny bolt on firewall ( not to engine as we know you have a good engine ground as starter cranks). If a good body ground lets her run you know you need to run a good perminate ground from battery to body
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Old 01-20-2014, 04:20 PM   #15
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On 98 TJ the fuse for power to coil is F21 in the box under the hood

I think 97 is the same but it changed after1998
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Old 01-20-2014, 04:29 PM   #16
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I don't have a f21 fuse
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Old 01-20-2014, 04:45 PM   #17
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Ok looked up 97 and power runs from battery then thru fuse 9 then thru automatic shutdown relay then thru fuse 28 then to coil

The coil wire that gets plus 12 with key on is dark green with a light green stripe

So verify that one is plus 12 compared to battery ground with key on

If not check fuses F9 and F28

Jeep likes to make minor wiring changes each year
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Old 01-20-2014, 04:52 PM   #18
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F9 is good and I don't have a f28 . Also there is no power going to coil
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Old 01-20-2014, 05:02 PM   #19
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Yes you should have a fuse 28 see attached photo from 97 FSM power distribution center under hood

You will note 2 rows of 5 fuses 28 is upper of two rows far right
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Old 01-20-2014, 05:03 PM   #20
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Actually 2 rows of 6 fuses but still upper row far right
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Old 01-21-2014, 03:53 PM   #21
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All the fuse check out. I also tried to jump the coil to Trey and get spark but it still wouldn't start
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Old 01-21-2014, 04:24 PM   #22
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I never saw an answer about your comment that the "gauges won't come up". Do the gauges on the dash work? Are you sure you have fuel at the injectors? Do you hear the fuel pump run?
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Old 01-21-2014, 04:50 PM   #23
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The same fuse he claims to not have supplies power to coil and injectors while the PCM controls both by pulsing the ground side
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Old 01-21-2014, 04:56 PM   #24
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Not sure if youve tried, but are you getting fuel to the fuel rail? fuel pressure?

EDIT: Just saw you had no power going to the coil. Gotta find that fuse.
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Old 01-21-2014, 07:50 PM   #25
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Quote:
Originally Posted by twinbob04 View Post
The terminals are right and tight.the lights AC fan turn finals all work its just not getting any spark
I know in newer model vehicles if fan comes on with key on but not started it indicates ecm failure. Kinda goes into a fail safe mode. Not 109 percent sure if this applys to your jeep
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Old 01-21-2014, 08:00 PM   #26
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Look at previous post and check with meter or test light at first fuse then relay then second fuse find where power is lost then we can figure why it is lost there

Also like he said if you had the gray key head with chip know as sentry key and key was dropped or damaged or you have a replacement key without being chipped or programmed it the sentry key factory system keeps engine from running as an anti theft feature
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Old 01-22-2014, 03:51 PM   #27
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My key is just a all metal key my Jeep is a 97
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Old 01-22-2014, 07:47 PM   #28
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And I assume the all metal key worked before this new problem occurred if not tell us

I looked up the 97 power to coil routing so check at both fuse connection for power and report back (you can use a meter or test light) pull one of the fuses turn key on and see if at least one side of cavity where you pulled the fuse shows 12 volts on meter or lights test light when other lead of meter or test light is connected to battery negative. The replace that fuse and and do the same with the other fuse and report results

You are our eyes and hands on this so for useful help you gotta do the tests and report back

The specific two fuse numbers are in my prior post
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Old 03-03-2014, 07:35 PM   #29
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Quote:
Originally Posted by workshop4ever View Post
I never saw an answer about your comment that the "gauges won't come up". Do the gauges on the dash work? Are you sure you have fuel at the injectors? Do you hear the fuel pump run?
no the gauges do not work but they do light up
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Old 03-03-2014, 07:38 PM   #30
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Originally Posted by Digger84 View Post
And I assume the all metal key worked before this new problem occurred if not tell us

I looked up the 97 power to coil routing so check at both fuse connection for power and report back (you can use a meter or test light) pull one of the fuses turn key on and see if at least one side of cavity where you pulled the fuse shows 12 volts on meter or lights test light when other lead of meter or test light is connected to battery negative. The replace that fuse and and do the same with the other fuse and report results

You are our eyes and hands on this so for useful help you gotta do the tests and report back

The specific two fuse numbers are in my prior post
i check the fuses with a test light and they both light up.

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