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Old 05-05-2009, 12:46 AM   #1
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not starting but turning over fine?

okay, here in the last few weeks when i get in the jeep after it sits over night or any period of time over like an hour or two it wont start on the first crank. the starters turning over fine but it just wont start. when i turn the key off and sit till it stops spinning and re try it starts right up, any suggestions on where to start? a friend recomended sea foam to clean the injetors, any input?

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Old 05-05-2009, 01:14 AM   #2
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Im Not shur but mabe you might have a bad battery? Or maybe a bad altornator? And I like the quot.

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Old 05-05-2009, 01:36 AM   #3
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do you park it on level ground?

does it smoke when you start it (if so you may have bad compression due to rings or valves) this will happen because the engine is cooling and the metal parts are returning to normal size

also pull a plug and see if they are fowled (wet)

check to see if timing is accurate
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Old 05-05-2009, 01:40 AM   #4
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Injector cleaner is a good start.

What year and how many miles?
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Old 05-05-2009, 06:20 AM   #5
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might be a bad check valve in your fuel pump............
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Old 05-06-2009, 12:14 AM   #6
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its a 04 with about 18,000 miles. yea its usually parked on level ground or close to it. havn't pulled any plugs yet, im gonna try and get to autozone tomorrow and get the sea foam. if it were the plugs/wires, would i notice it on the road? its been running fine once it starts, jw. also, i did the diagnostic, where u turn the key on and off three times, and it just says done, so in other words no codes, i think?
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Old 05-06-2009, 09:25 AM   #7
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i have been haveing this problem for about a month asked my buddy to bring fuel pressure gauge and guess what pump check valve is bad my pressure dropped like 10 psi a min and stoped at 4 psi. same issues sits for more than 30 mins and is very hard to start. more than likely it is the check valve get a fuel pressure gauge and test it. oh and the stealership wants 429.00 4 it
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Old 05-06-2009, 10:01 AM   #8
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My 97 has been doing that for 2 years. I just deal with it. I've been told it's probably the fuel pressure regulator. When I find the time to drop the tank, I'll fix it.
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Old 05-07-2009, 12:43 AM   #9
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$429!! Wtf. they can kiss my shiny white behind. i'll check it though, im sure i know somone who has the guage. if thats the problem will it hurt to to just crank it twice everytime
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Old 05-07-2009, 05:14 AM   #10
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Quote:
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My 97 has been doing that for 2 years. I just deal with it. I've been told it's probably the fuel pressure regulator. When I find the time to drop the tank, I'll fix it.
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$429!! Wtf. they can kiss my shiny white behind. i'll check it though, im sure i know somone who has the guage. if thats the problem will it hurt to to just crank it twice everytime
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Old 05-08-2009, 01:45 AM   #11
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haha, i like your response, but u think it'll cause bigger problems down the road?
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Old 05-08-2009, 08:08 AM   #12
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i found it for 101.95 at autozone so i am going with that i dont like how much it turns over sometimes and would prefer it to start when i 85 miles into the mountains with no cell service and i have my wife and kids thats why i am going to change it but i dont think it will hurt to much, well except if you have to ask a guy who drives a hummer for a jump.
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Old 05-11-2009, 09:05 AM   #13
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If you turn the key to the "on" position (position right before it cranks), and wait 10 seconds, does it start fine?

If so, then it is most likely the fuel pressure regulator leaking back. When you leave the key on in that position, the pump will run for a short bit bringing the pressure in the fuel system back up.

Lots of people have the problem, and many opt to just live with it. Seems like it never gets bad enough that the Jeep won't start at all.
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Old 05-11-2009, 09:56 AM   #14
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Yes it's a Jeep thing I know of over 20 of them that do the same thing.If you get in, turn the key on and back off two times waiting 3 seconds each cycle it will 9 times out of 10 start right up on the 3rd hit of the switch.I have been told that the valve is made inside the fuel pump but there is an after market fuel line check valve that can be put in the line without dropping the tank and is supposed to cure the problem.It is actually for BMW or Mercedes or something like that and it is only like $8 But I have not tried it yet.Why?? well not sure just got used to waiting a few seconds before starting,about like a diesel turn on the key and wait for the plugs to heat up.
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Old 07-26-2009, 01:54 PM   #15
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If the dealer is trying to charge you over $400 for the part, they're trying to sell you the whole pump. Fuel pressure regulator is a SEPARATE piece that sits on top of the fuel pump (actually outside of the tank). You still have to drop the tank but I bought my fuel pressure regulator from the dealer for $118 two years ago and did the job myself. Starts perfect ever since.
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Old 07-26-2009, 06:36 PM   #16
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Yep fuel pressure. This not only a jeep thing but Chevys have this issue also.
Have seen a lot of it here recently.

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