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Old 08-22-2012, 08:55 AM   #1
Surfordie's Avatar
Join Date: Aug 2011
Posts: 52
Cant get jeep started?

I have not been able to get my jeep started and i am not a very good mechanic so i am turning to everyone on here for help, Im pulling the codes 31, 42, and 43 on the odometer but im not sure which one is keeping it from starting. Recently my gas tank skid plate rusted out and dropped my tank so i am suspecting it is my fuel pump, i can still hear it prime but im unable to check the pressure, other then that i have no idea what it might be. Any help is appreciated.
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Old 08-22-2012, 09:50 AM   #2
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Join Date: Mar 2012
Location: GA
Posts: 112
year model and engine size?

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Old 08-22-2012, 10:03 AM   #3
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Join Date: Aug 2011
Posts: 52
97 2.5l, I dont think it is getting spark but im not sure how to test it.
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Old 08-22-2012, 10:31 AM   #4
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Join Date: Jul 2012
Location: Shermer, IL
Posts: 83
To check for spark:
Pull one of the plugs.
Plug it back into the spark plug wire.
Hold the plug against the engine block or valve cover while someone turns the engine over.
Easier to see if it's a bit darker, like in a garage, but you'll see the spark if there is one.
If unfamiliar with how to do this check YouTube for how to check for spark.
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Old 08-22-2012, 10:32 AM   #5
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Join Date: Jul 2012
Posts: 19
To check for spark pull a spark plug out, connect it to the wire and then touch the spark plug to a nice clean spot of bare metal and have someone crank the motor over. You should be able to see a small spark.
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Old 08-22-2012, 10:42 AM   #6
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Join Date: Oct 2011
Location: Spain
Posts: 548
Take of one of the sparkplug cables. Take a spare plug (or a srewdriver), stick it in the cable, hold sparkplug or screwdriver against (in case of plug) or close (in case of screwdriver) to engine block and crank. Should give good crisp blue sparks.

Beware: do not hold metal part of screwdriver. 15.000 volts hurt.
'98 TJ 2.5 - 2,5" lift - 31"s on Pro-Comps
'02 KJ 2.5 - 3" lift - 245's on Moabs - Diesel
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Old 08-22-2012, 10:44 AM   #7
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Join Date: Aug 2011
Posts: 52
If im not getting any spark, what should i look into next?

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