engine occasionally not starting... not sure of the issue - JeepForum.com
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post #1 of 6 Old 08-10-2016, 04:20 PM Thread Starter
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1997 TJ Wrangler 
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engine occasionally not starting... not sure of the issue

Hey all,

I have a 97 Sahara. Its in great shape and runs well 98% of the time.
However, Ive been having some recent troubles. The engine doesnt start sometimes; it revs but doesnt turn over completely. Ill come back to it later, and it will start. My friend and I had successfully jumpstarted it one time previous. It recently did it again today, but the jump didnt work? That was the last straw. I always come here first for advice though.

I dont know if its the battery or another electrical problem. Ill be mad if its the fuel pump; I just had the fuel pump replaced last winter, due to some RPM surging issues.
The Shell station that inspected my car and did the install botched the whole thing and now the gas gauge is not accurate. It left a bad taste in my mouth, believe me. My gf was the only reason i didnt get physical with the guy. He literally said there wasnt anything he could do. and this is just thing I need to go back with some righteous anger and perhaps sue them?

But thats the worst case scenario.. this may just be the battery.

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post #2 of 6 Old 08-10-2016, 05:39 PM
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1999 XJ Cherokee 
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I'd test the battery first and then the starter.

Originally Posted by jeepinmichguy_ View Post
TheBoogieman is a jerk.
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post #3 of 6 Old 08-10-2016, 06:52 PM
Jerry Bransford
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2004 TJ Wrangler 
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Location: Escondido, California
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I'm a little confused by the symptoms as described. Does the starter motor crank the engine over at its normal speed but the engine just never starts? Or does the starter not run to crank the engine at all?

Cranking is not the same as starting.

If it cranks normally but just doesn't start up quickly, try this and see what happens... before turning the ignition switch to Start, turn the ignition switch on-off-on 6=7 times with about a 1-2 second gap between each on-off-on cycle. THEN turn the ignition switch to Start and see what happens.

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post #4 of 6 Old 08-10-2016, 08:01 PM
R.I.P. Knuckelhead
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2000 TJ Wrangler 
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After its been sitting for a while you could check the schrader valve on the fuel rail for pressure...
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post #5 of 6 Old 08-12-2016, 06:51 AM
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I have read about an issue related to heat soak causing a hot engine not to start after sitting. There is a TSB but it specifically calls out the 2000-2004 TJs


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post #6 of 6 Old 08-12-2016, 06:24 PM
R.I.P. Knuckelhead
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2000 TJ Wrangler 
Join Date: Aug 2005
Location: Colorado
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It doesn't cause a no start, it causes a no fife on cylinder #3 due to vapor lock. The engine starts but cylinder #3 isn't getting enough fuel to fire...
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battery , electric , fuel pump , no start , starter

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