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Old 09-25-2007, 09:36 AM   #1
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Starting Issue

So jeep took the liberty of replacing my fuel pump/sendingunit/pressure regulator all in one wallet killer for free.... But my issues with taking 10-15 cranks of the starter to get the engine to fire is not gone. So since we have ruled out that component, where should I look next??? My plugs are brand new and wires seem good, so I know I am getting spark. The timinig is good, because once it starts it purs like a kitten. I am out of ideas. Help Please!!

By the way, If i start it and drive it a bit then turn it off... It cranks right back up. The longer it sits, the better it starts.

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Old 09-25-2007, 12:16 PM   #2
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cam/crank sensor,

or something is getting hot.

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Old 09-25-2007, 12:44 PM   #3
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Throw in some injector cleaner and see if it helps.
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Old 09-25-2007, 12:46 PM   #4
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if you have the tools to check fuel pressure, let the jeep sit for a while and then check the fuel pressure at the fuel rail. turn the key to the on position and see if the fuel pressure changes immediately. if it takes a while to build up, it could be the fuel pump. but you did say they just replaced it, so i wouldn't think that would be it. i don't know if these things are like the grand cherokees, but they have a mechanical device outside of the gas tank that keeps the fuel pressure up while the vehicle is off. i dont' think my '98 with the 4.0 has this device but i don't know about the 2.5.
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Old 09-25-2007, 12:48 PM   #5
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I'm a little confused: Are you having an issue at initial start-up after you have left it off for a long time or are you having starting issues after you drive it for a long time?

If you are having a problem re-starting following a long drive then I would take a look at/replace the starter and ground cables. I had an issue in a '69 Mustang that I owned where the engine would start-up no problem but after a long period of driving would really labor on re-start. I changed out the positive and negative cables to the battery and starter solenoid and the problem went away. The copper conductors break down over time and when they get too hot will not carry enough amperage.
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Old 09-25-2007, 01:46 PM   #6
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The problem is when it has sat for a while and i try and start it. And yes the fuel pump just got changed thanks to a recall. Like most Fuel Injected cars, the system should hold pressure while the vehicle is off. I believe this is where my issue lies. I think I may have narrowed it down to bad injectors allowing the pressure to escape the fuel system. Anny feedback on this idea?
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Old 09-25-2007, 02:37 PM   #7
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I had a very similar problem with a completely different type of car. It turned out to be the fuel injection. It's been awhile, but IF I remember right it was dirty or partially clogged injector(s). When the engine warmed up, the heat expands everything a little and re-starting was not a problem, only when cold.

Either that (memory is a bit fuzzy) or it was a sensor that tells the computer how much fuel/air is flowing. Same as above, was dirty or fouled and when it was warm it worked ok.
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Old 09-25-2007, 02:38 PM   #8
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the same thing happens for me, i have to hold the starter on for about 3 maybe four seconds, and once its warm it starts fine, im used to just giving it some gas and it starts almost right up, is it a bad thing? like am i wearing down the starter excessivly if i dont look into it?
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Old 09-26-2007, 11:18 AM   #9
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I'm pretty certain (may be that there is a device in the gas line part of the system which keeps the fuel from flowing back into the tank. It sounds to me that could be the prob. Just read an entire thread about this exact issue. It turned out to be a bad unit.

C.
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Old 09-26-2007, 12:23 PM   #10
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ok i know this is my fist post and all, but i had the SAME, problem happen to mine, tested everything i possably could on the jeep, and it turned out to be a bad battery, but that was tested to and it read fine, replaced it and never had the problem again.... Good luck hope that solves the problem for you to.
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Old 09-26-2007, 12:24 PM   #11
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Quote:
Originally Posted by jp'rs_peep'rs View Post
I'm pretty certain (may be that there is a device in the gas line part of the system which keeps the fuel from flowing back into the tank. It sounds to me that could be the prob. Just read an entire thread about this exact issue. It turned out to be a bad unit.

C.
Thats just it.. the pump, sending unit, and pressure regulator are all one piece... and that part was just changed under recall.... so it has to be elsewhere in the system.

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