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Unread 08-16-2011, 01:29 PM   #1
Jeeplady13
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Help a girl out my Jeep wont start !!!

My 95 yj was having a few hiccups while driving on the highway it seamed as if it was missing, it was fine idling but hit high speeds and it missed. this morning it crapped out on me on the highway, so i got it towed back to my shop. i pulled the distributor cap off and the rotor. the cap and rotor looked in really rough shape so i got NAPA to get me new plugs, wires, cap and rotor put it all back together and she still wont fire! any suggestions?

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Unread 08-16-2011, 01:33 PM   #2
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Start cheap and simple.

Fuel Filter.
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Unread 08-16-2011, 01:40 PM   #3
TheNewbie
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You did what I would have done first. But if the new cap and rotor didn't help I'd be looking at a clogged cat or fuel filter.

Are you getting good fuel pressure?
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Unread 08-16-2011, 01:47 PM   #4
R3V413
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Are you getting spark from your coil? And if so, what color is the Spark?
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Unread 08-16-2011, 02:06 PM   #5
Andywear
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We're going to need pic's before this problem gets fixed.
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Unread 08-16-2011, 02:07 PM   #6
zeus87gn
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Did you double or tripple check your firing order?
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Unread 08-16-2011, 02:07 PM   #7
Que89YJ
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Couple things Jeep girl. First things fist though: Love the Jeep collection!

Check for fuel and spark. Spark by pulling a wire and hold it near ground to see if it arc. Fuel by depressing the schrader valve on the fuel injector rail. Fuel should come shooting out of it. Check the codes. I just posted how on this thread at the bottom:

http://www.jeepforum.com/forum/f12/e...ently-1253607/
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Unread 08-16-2011, 02:32 PM   #8
pasinbuy
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Check your CPS. It is the sensor on the bell housing, driver side. Unplug it, wait a minute, plug it back in. If your Yj then starts go get a new CPS.
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Unread 08-16-2011, 02:37 PM   #9
Boodyrider
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I'm leaning towards a fuel pum as you mentioned issues above idle. Fuel filter first, but be prepared for a pump. To diagnose you really need to check fuel pressure at the schraeder, not just see if it squirts...
Also check fuel pump connector at the tank area, fuse, and relay for fuel pump.
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Unread 08-16-2011, 03:40 PM   #10
Jeeplady13
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Firing order is good and spark is excellent, I just checked the fuel on the intake and nothing is coming out so I am thinking it's a fuel pump. If I turn the key I should hear the fuel pump working?? Thanks everyone for the help.
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Unread 08-16-2011, 03:43 PM   #11
Jeeplady13
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I have a fuel pressure gauge and I will hook it up right away because all I did was see if it squrted.
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Unread 08-16-2011, 05:11 PM   #12
oldtime_ironman
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Sounds about like the fuel pump - mine did the exact same thing when it went. FWIW those pumps need to have gas in the tank in order to keep cool. Mine fried because I tried to drive 30 miles home on 1/8 tank. Best bet if you get a new pump, is to always keep 1/2 tank of a good name brand gas in it.
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Unread 08-16-2011, 05:39 PM   #13
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Unread 08-16-2011, 06:45 PM   #14
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DOUBLE CHECK the firing order!!

The cap I bought from NAPA had cylinder 1 off by 1 notch. My Jeep wouldn't fire at all. After lots of headscratching, I decided to start futzing with the firing order. Moved the plugs over 1 notch and she fired to life.
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Unread 08-16-2011, 06:58 PM   #15
Hawk37
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I had a similar problem with my 93. It actually turned out being the capacitors in the Pcm. I'd say check to see if your fuel pump.is getting power before you pull the tank and replace it. It'd be easy to test up at the relay in the fuse box. The caps are easy to replace if you know how to solder. There is a good write up about it on here too. Search pcm capaciters, or pcm fix.
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