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Old 02-22-2012, 10:44 AM   #1
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Hesitation on start up- thoughts?

Hey all,

The jeep has a hesitation when it tries to start- around 1-2 times a day (usually when cold). It has to turn over around 7-10 times before it goes. Now, I have had the fellas over at Autozone test it and they said the starter was weak (pulling 163 amps) but when I took it over to NAPA they hooked up their computers to it and said that first the battery was shot but the alternator and starter were showing OK.

I replaced the battery (Napa) but still have the hesitation sometimes. We retested the whole system and the batteries on their own. The old battery still sucked and the system checked out fine...even with the slight hesitation.

Has anyone noticed their 2.4 4cyl taking a bit to turn over? Is the starter just a smaller unit? NAPA offers a "heavy duty" starter for the 2.4l but the guys there did mention that since its been sitting so much (averaging 3500 miles a year for the last 7 years) that perhaps it just needs to be going for a week or so and perhaps the starter will right itself. NAPA first suggested that it was not the starter since there were only 7 available in their stores nationwide suggesting that the part has a low failure rate. I have no idea. All I know is that they are hard to find.

Also, once its warmed up the hesitation usually goes away.

OK, thats all I've got
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Old 02-22-2012, 10:48 AM   #2
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My jeep is the same way, I know mine sat a lot over the past few months, so thats what my guess is, any help is appreciated though!

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Old 02-22-2012, 11:07 AM   #3
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My Jeep dose the same but I have a I6 but it shouldn't be much different. From what I have come up with from research there is a part in the fuel pump that over time becomes blocked so it takes longer for fuel to reach the fuel rail. If I turn the key on and let it sit for 15 to 30 seconds it starts up a lot faster and easier than it usually dose.
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Old 02-22-2012, 11:17 AM   #4
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Mine was doing the same thing, replaced the fuel pump and havent had any issues. Starts right up now.
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Old 02-22-2012, 12:19 PM   #5
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OK- so I have NOT checked the fuel filter yet. The pump is something I can look into as well. I have tried to turn the key and let the pump work for about 10 seconds and I 'think' that helps but who knows.
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Old 02-22-2012, 04:36 PM   #6
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Quote:
Originally Posted by jetskier111
OK- so I have NOT checked the fuel filter yet. The pump is something I can look into as well. I have tried to turn the key and let the pump work for about 10 seconds and I 'think' that helps but who knows.
Let it sit longer than 10 seconds. I usually get in my jeep and turn the key and get everything ready before I try to crank up and it helps a lot.
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Old 02-24-2012, 07:46 AM   #7
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So its still hesitating- today was the longest. When I called NAPA to order a filter they said it was internal and even though it looks to be 'in-line' its not really something that can be changed. I am going to use a few treatments of Seafoam to see if its perhaps water in the tank. It HAS been sitting a lot and who knows whats going on...

I need to figure it out though, my wife is giving me the 'look'...
you know, the 'you just spent how much money on that toy that looks to be fouling up!!' look.
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Old 02-24-2012, 07:59 AM   #8
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It's not the fuel filter. Your anti drainback valve might have given up. Try cycling thru on off on few times before cranking your engine. If it starts faster, then for sure it's anti drainback valve.
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Old 02-24-2012, 08:38 AM   #9
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I can't attest for most of the troubleshooting suggestions here but I will say replacing my original 12 year old starter made a night and day difference. Literally went from 3-5 cranks to just one! And since Autozone did say it tested weak (I wouldn't trust NAPA since they basically sold you a battery you apparently didn't need) it probably wouldn't be a bad idea to swap it out. Even with low mile driving it can still turn into a rusted lump over time.
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Old 02-24-2012, 12:06 PM   #10
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Anti drainback valve. I will check it out in the manual (chilton).

Anyone ever changed one before?
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Old 02-24-2012, 12:08 PM   #11
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Quote:
Originally Posted by Blackpony04
I can't attest for most of the troubleshooting suggestions here but I will say replacing my original 12 year old starter made a night and day difference. Literally went from 3-5 cranks to just one! And since Autozone did say it tested weak (I wouldn't trust NAPA since they basically sold you a battery you apparently didn't need) it probably wouldn't be a bad idea to swap it out. Even with low mile driving it can still turn into a rusted lump over time.
Yea, I want to change it but I'm just going thru the cheaper options first. Now, that battery was crap for sure, I just think there's more to the hesitation then that. It will right itself soon though...
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Old 02-25-2012, 01:35 PM   #12
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Victory!!! After two complete Seafoam treatments followed by new spark plugs the beast fires up perfectly everytime!

Oh and if you have never done a real seafoam treatment first its great and second it makes a lot of smoke.
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Old 02-25-2012, 10:01 PM   #13
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Glad you seem to have it figured out.

For what it's worth, my Jeep was hesitating a lot while starting for a while, maybe close to a year. Finally it just didn't start one day. Turned out to be the starter. Replaced the starter and she starts like a champ now. Replacing the starter is pretty easy, and the part isn't too expensive (I want to say around $60 or $70, plus a core charge).
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Old 02-25-2012, 10:18 PM   #14
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My 97 2.5 did the same thing and what I do to get it to start first crank is turn the key on and off 2-3 clicks and it starts right up.
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Old 02-27-2012, 03:28 PM   #15
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My 97 2.5 did the same thing and what I do to get it to start first crank is turn the key on and off 2-3 clicks and it starts right up.
have a 2001 Jeep Wrangler that I use for a spare vehicle and to plow the driveway in the winter the wife uses it as a convertable in the summer and I also use it to haul a small trailer so I dont need a truck. It started a problem that you have to turn the key on 3 times and then to the srart position then it would start. Chrysler dealership told me that the check valve in the electric fuel pump was not holding the fuel up and over $500. for a new pump so I bought a inline fuel check valve and installed it where the fuel line comes out of the fuel tank. Then it blew out the hose by the tank so I put in a high pressure hose then the fuel rail blew out the diaphram. So I took it and had the fuel pressure tested and it was good but when you shut the engine down the pressure would build till it peged there gauge. So I took out the check valve and back to turning the key 3 times then starting and it has worked this way for over 2 years so far
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Old 03-08-2012, 05:11 PM   #16
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Well... It's back. After all the above stuff and now a new starter its still starting with the occasional hesitation.

Thoughts?
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Old 03-08-2012, 05:39 PM   #17
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Can someone clarify what you mean by "hesitation"? If it means what I think it means starter is not what I would look at. I don't even know what a "weak" starter is?
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Old 03-09-2012, 06:19 AM   #18
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Sure. What I'm having happen is that when I go to turn the key the starter turns over several times (sometimes nearly 10 seconds) to get the jeep going. Some days one turn does it. There is no special thing that makes it go one way or the other from what I'm seeing so that's the frustrating thing.

The only thing I have not done is pull fuel lines to inspect since it does start several times completely normal. I try the 3 key turn trick and it helps marginally. Anyone know what that would be doing??
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Old 03-10-2012, 07:05 PM   #19
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I just bought one of these fuel regulators now to drop the tank and install it and hope it works

Seems like a good deal with shipping included

eBay - New & used electronics, cars, apparel, collectibles, sporting goods & more at low prices

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