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Old 03-13-2012, 06:39 AM   #1
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having a hard time starting my Jeep

I have a 2001 tj se 2.5 with manual trans ....so for the last couple days when I go to start it struggles to start. Up until a couple days ago the engine caught after 2 or 3 revolutions now it's more like 12+ revolutions before it catches. I did notice after I drive it for a little while and turn if off & then start it again it catches right away. Any ideas?

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Old 03-13-2012, 06:43 AM   #2
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I always start with simple stuff just to eliminate. Try cleaning battery terminals. Just the slightest bit of corrosion can cause issues.

Once it's started do you ever have trouble with it? Sputtering, rough idle, etc

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Old 03-13-2012, 06:46 AM   #3
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Nope once it starts it runs good
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Old 03-13-2012, 07:03 AM   #4
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If the fuel pump was bad it would just not work any more right?
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Old 03-13-2012, 07:03 AM   #5
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I'm subscribed to this thread because this is exactly what is happening to mine, just started three days ago when the weather shot up from 30 to 65 over night. I thought it had something to do with the fuel mixture set by the computer. So what I did was turn the car in the on position, press the gas pedal twice, and on the third time hold the gas pedal for 10 seconds. In some cars, don't know about jeep, that will reset the reading for the outside temp on the computer. So far it's been good to me for the past two-three starts. It doesn't hurt to try if you want to.
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Old 03-13-2012, 07:17 AM   #6
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I'll try it & it has gotten alot warmer the last couple days
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Old 03-13-2012, 07:19 AM   #7
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Nope didn't work
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Old 03-13-2012, 10:01 AM   #8
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Update for my jeep: this morning it is still doing the exact same thing. I'm going to have my auto tech look at it while I'm at work. I'll let you know what I find.
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Old 03-13-2012, 10:30 AM   #9
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mines doing the same thing.... im thinking fuel pressure regulator maby?
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Old 03-13-2012, 10:38 AM   #10
Knows a couple things...

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An engine that starts slowly after sitting overnight but starts right up if it was recently running almost assuredly has a leaky check valve inside the fuel pump or fuel pressure regulator. The job of those two check valves is to keep fuel up in the fuel rail next to the fuel injectors for a fast start. When the check valve leaks, it instead lets the fuel drain back down out of the fuel injector/fuel rail area and back into the fuel tank. When that happens, it take quite a while for the fuel pump to get the fuel back up from the gas tank to the fuel rail which is what causes the slow start.

The fix is to replace the fuel pump/fuel pressure regulator assembly which requires that the gas tank be dropped... which is really not all that hard of a job.

This problem has happened to me on both of my TJs so it's not an uncommon problem. In fact, it's actually a common problem for the TJ.

A good source for the fuel pump/fuel pressure regulator assembly is www.rockauto.com which has great pricing and fast shipments.

P.S. I used to recommend just replacing the fuel pressure regulator but now it's a toss-up on which is causing the problem, fuel pump or fuel pressure regulator, so I now just recommend replacing them both as an assembly to avoid having to do the job twice... as I did on my present TJ.
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Old 03-13-2012, 03:51 PM   #11
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Ugg I was really hoping not to have to drop the gas tank!! Thanks for the info guys! I'll keep you posted
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Old 03-13-2012, 04:44 PM   #12
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Mine is the same way. If you turn the key to the ON position for 2-3 seconds the fuel pump kicks on and brings fuel up to the fuel rail. Mine starts right up in the morning after i let the pump run a few seconds. If i dont let it run before trying to start it, it takes about 10 seconds. Easy way around it if you dont want to replace anything yet.
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Old 03-13-2012, 05:32 PM   #13
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Quote:
Originally Posted by LiftedTj View Post
Mine is the same way. If you turn the key to the ON position for 2-3 seconds the fuel pump kicks on and brings fuel up to the fuel rail. Mine starts right up in the morning after i let the pump run a few seconds. If i dont let it run before trying to start it, it takes about 10 seconds. Easy way around it if you dont want to replace anything yet.
This is what i do, i had the same problem, i turn it on until it beeps 5 times, then start her up, never have any problems, ya just need to circulate the fuel
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Old 03-13-2012, 07:02 PM   #14
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Wow that works! Thanks for all the help guys I love this forum
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Old 03-13-2012, 07:15 PM   #15
K O R

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5 beeps, very interesting?? I will have to remember that one..

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