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Long Cranking...Please Help Trouble Shoot

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Old Jun 10, 2011 | 10:24 AM
  #1  
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Year: 1994
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Default Long Cranking...Please Help Trouble Shoot

Before anyone asks...I have googled the shat out of this and have found TONS of things that people claim it could be from a dryrotted hose on the fuel pump inside the gas tank to the auto shutdown relay. My problem is the jeep use to turn over in about 2 seconds....now it takes about 5 seconds and sometimes will choke up and stall out the first time it fully turns over. The next time I turn the key it starts up immediatly.

I noticed this problem after I changed my oil. I dont know how much that could related, but the engine has 104,000 miles on it. I put 10w-30 in it which i know isnt a super thick oil. Could me doing this and removing old thick oil cause the longer cranking times?

Any help would greatly appreciated.
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Old Jun 10, 2011 | 10:27 AM
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Do you have access to a fuel pressure gauge?

what if you try turning the key to the run position for a few seconds to let the fuel pump prime/build up pressure, then try starting it?
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Old Jun 10, 2011 | 10:32 AM
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when was the last time it had a tune up start with the basics u might be surprised just plugs can cause a long crank or hard start
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Old Jun 10, 2011 | 10:38 AM
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Originally Posted by Mattpar
Do you have access to a fuel pressure gauge?

what if you try turning the key to the run position for a few seconds to let the fuel pump prime/build up pressure, then try starting it?
Tried this already and got the same results.
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Old Jun 10, 2011 | 10:39 AM
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Originally Posted by Screwd up 6

Tried this already and got the same results.
What year is it?

Sent using CherokeeFM
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Old Jun 10, 2011 | 10:43 AM
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Originally Posted by jeeptech40
when was the last time it had a tune up start with the basics u might be surprised just plugs can cause a long crank or hard start
New plugs, wires, cap, and all was done about a month ago. I did all that right away when I noticed the longer starts.
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Old Jun 10, 2011 | 10:44 AM
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Originally Posted by Uhrinator
What year is it?

Sent using CherokeeFM
1994
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Old Jun 10, 2011 | 01:33 PM
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When you turn the key to the on position, can you hear the fuel pump kick on?

If you can't be good, be good at it!
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Old Jun 10, 2011 | 02:26 PM
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Originally Posted by Magiksreal
When you turn the key to the on position, can you hear the fuel pump kick on?

If you can't be good, be good at it!
i have never heard it kick on...even when i first got the jeep.
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Old Jun 10, 2011 | 02:54 PM
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Mine used to do that, my battery terminals were corroded and it would barely start and when it did it would idle realll low and shut off
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Old Jun 10, 2011 | 02:59 PM
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I've never been in a pre-'97 jeep that I couldn't hear the fuel pump on.

That's just my own personal experience mind you, but if it were mine, I'd swap the fuel pump (and fuel filter too, just because).

If you can't be good, be good at it!
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Old Jun 10, 2011 | 03:03 PM
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I have already changed the fuel filter 2 times. if i sit in it and turn the key to on and wait 5 secs....then do it again 3 more times it doesnt start any faster.
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Old Jun 10, 2011 | 03:03 PM
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Originally Posted by Gregruot7
Mine used to do that, my battery terminals were corroded and it would barely start and when it did it would idle realll low and shut off
Terminals are clean and has brand new optima red top
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Old Jun 10, 2011 | 03:04 PM
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I recant that.

First, I'd pull the battery and have autozone test it for me. They generally test them for free.

Remember, heat kills batteries and even in perfect conditions, they don't last forever.

If the battery is good, but dead, check the alternator (IIRC, autozone can check those as well!).

Always rule out the easy-to-fix causes before you start wrenching.

If you can't be good, be good at it!
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Old Jun 10, 2011 | 03:06 PM
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If it's drivable, they have a cart they can wheel out to your rig to do the testing.

If you can't be good, be good at it!
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