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Old December 15th, 2012, 09:43 AM   #1
Jake16JA
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Default Won't Start

Yesterday morning, I was warming up my 94 YJ 2.5L, right when I was ready to leave my RPM's and eventually stalled. I, then, started it up again where it only got to 200 RPM before stalling out. Now it won't turnover at all. I had recently replaced the fuel pump, so I had thought that it had come loose or the wires lost connection, but everything seemed to be fine. Now I'm stumped on what it might be, anyone had anything similar happen or have any suggestions?

Thank you for any help,

Jake
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Old December 15th, 2012, 09:51 AM   #2
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fuel pump will not stop it from turning over.any oil in it?
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Old December 15th, 2012, 09:55 AM   #3
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Won't turn over or won't fire? If it won't turn over that's definitely not fuel related. If you mean it won't fire, get a fuel pressure gauge it could be the fuel pressure regulator. Make sure you have spark as well.
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Old December 15th, 2012, 09:56 AM   #4
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Bad alternator dead battery
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Old December 16th, 2012, 04:54 PM   #5
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I'm not the greatest with vehicles, but I believe it's just not firing.

There's definitely oil in it, altenator and battery are good as the radio and other electronics fire up when I try to start it.

I thought that I had replaced the fuel pump very recently a good detail to include.
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Old December 16th, 2012, 05:28 PM   #6
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Check engine codes gave:

12- Battery disconnected within last 50 starts

33- Air Conditioning

55- End Transmission
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Old December 16th, 2012, 06:41 PM   #7
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Quote:
Originally Posted by KCameron13 View Post
Won't turn over or won't fire? If it won't turn over that's definitely not fuel related. If you mean it won't fire, get a fuel pressure gauge it could be the fuel pressure regulator. Make sure you have spark as well.
Fuel pressure seemed almost nonexistent, couldn't find a gauge to buy at this time, but it seems the fuel pressure regulator went bad. I didn't check but I'm pretty sure I have a spark because it fired up before, what I'm assuming, losing fuel pressure.

Thanks,

Jake
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Old December 16th, 2012, 08:14 PM   #8
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Quote:
Originally Posted by Jake16JA View Post
Fuel pressure seemed almost nonexistent, couldn't find a gauge to buy at this time, but it seems the fuel pressure regulator went bad. I didn't check but I'm pretty sure I have a spark because it fired up before, what I'm assuming, losing fuel pressure.

Thanks,

Jake
How did you check the fuel pressure?
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Old December 16th, 2012, 08:47 PM   #9
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Buy or rent a fuel pressure guage and read it while cranking the engine. It should be around 40 psi.
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Old December 16th, 2012, 08:48 PM   #10
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There is a schrader valve/test port on the fuel rail to attach the guage to.
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Old December 16th, 2012, 11:17 PM   #11
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Get a gauge and get an actual pressure measurement. If the pump assembly is new, and you hear it kick on when the key gets turned to the on position, I'd start with the fuel pressure regulator.
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Old December 17th, 2012, 07:26 AM   #12
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Went ahead and bought a new fuel pressure regulator, after installation the jeep still didn't fire.
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Old December 17th, 2012, 07:51 AM   #13
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Does the engine crank when you try to start it? Is it starting to crank slower now that you haven't got it running? May want to get a battery charger on it to top up the battery before it is completely dead. If you haven't done it lately go through your basic tuneup procedure. Fuel filter, spark plug wires, cap and rotor. If you now think you have fuel you don't have spark.
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Old December 17th, 2012, 08:16 AM   #14
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Test fuel pressure!


You can borrow a gauge from the auto parts store.
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Old December 17th, 2012, 08:19 AM   #15
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Test fuel pressure!


You can borrow a gauge from the auto parts store.
this! stop throwing parts at it and find out whats really wrong with it !
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Old December 17th, 2012, 08:30 AM   #16
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Quote:
Originally Posted by bigbchevy View Post
this! Stop throwing parts at it and find out whats really wrong with it !


x2!
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Old December 17th, 2012, 09:27 AM   #17
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Quote:
Originally Posted by bigbchevy View Post
this! stop throwing parts at it and find out whats really wrong with it !
X3
You'll waste a lot of money just throwing parts at it. Find out what the actual issues are. Make sure you have proper fuel pressure and spark, then go from there. Just like it was stated above, auto parts stores lend these out if you don't have them, take advantage of that.
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Old February 19th, 2013, 09:20 PM   #18
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Do you have any gas in the tank?
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Old February 19th, 2013, 11:48 PM   #19
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First i would check the fuel pressure like everyone else says. If thats doesn't help i would turn my attention to the plugs, plug wires, and what almost sounds like a coil.
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