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Old 02-29-2012, 03:08 PM   #1
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I need help!! 1991 Jeep Wrangler will not start.

I have a 1991 Jeep Wrangler 4cycl. I am having problems getting it to start. The engine does turn over. I change out the fuel pump and bought a new battery. I also checked the sparks plugs and wires, all have spark. I sprayed started fluid in the carburator, it does start but kills. Any ideas what I could check now Do you think its electrical (fuses...relays)? Any info would help. Thanks!

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Old 02-29-2012, 06:18 PM   #2
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I'd start by checking the fuel pressure regulator and if's that not the problem i'd move on the the crank position sensor and the throttle position sensor, IF you're getting a strong spark from the coil...

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Old 02-29-2012, 06:21 PM   #3
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although it DOES sound like a fuel delivery problem if it starts with starting fluid
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Old 02-29-2012, 06:48 PM   #4
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I have a similar issue with mine. Give it some gas, in neutral, and see if it starts up.
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Old 02-29-2012, 06:52 PM   #5
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although it DOES sound like a fuel delivery problem if it starts with starting fluid
X2
If it starts on starting fluid, then it sounds like a fuel delivery problem. Check fuel pressure at the " carb I believe I read ".
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Old 02-29-2012, 09:15 PM   #6
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although it DOES sound like a fuel delivery problem if it starts with starting fluid
Thanks, I will check on those things you mentioned.. btw, I am a new learner and I was told today they are fuel injected with no carburator
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Old 02-29-2012, 09:24 PM   #7
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I have a similar issue with mine. Give it some gas, in neutral, and see if it starts up.
Thanks for replying. I have tried that, nothing works.. The only way I get it to start and not just turn over is to spray the starter fluid. I did replace the fuel pump relay and the fuel pump fuse but it still does not start..
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Old 02-29-2012, 09:25 PM   #8
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right!!,,,,lol....start with the fuel pressure regulator....it's at the end of the fuel rail that supplies the injectors, (on top of the motor)....pull the hose off the vacuum side of the regulator and see if there's gas present....if there is, the regulator is no good....on a side note, you might wanna buy you a Haynes or a Chilton manual.....they help loads when first learning...
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Old 02-29-2012, 09:28 PM   #9
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X2
If it starts on starting fluid, then it sounds like a fuel delivery problem. Check fuel pressure at the " carb I believe I read ".
Thanks for replying. I was just told today its fuel injected with no carburetor.. but the (intake) I sprayed the starter fluid was the right place just wrong name I wonder if the fuel line is clogged. I wonder if I could change the fuel line? There was no filter on the end of the fuel pump when removed. Im sure stuff could have gotten in the line...
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Old 02-29-2012, 09:31 PM   #10
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Thanks for replying. I was just told today its fuel injected with no carburetor.. but the (intake) I sprayed the starter fluid was the right place just wrong name I wonder if the fuel line is clogged. I wonder if I could change the fuel line? There was no filter on the end of the fuel pump when removed. Im sure stuff could have gotten in the line...
If that happened, it should have been picked up by the inline fuel filter....might wanna change that first off...
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Old 02-29-2012, 09:34 PM   #11
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Could be your fuel filter is clogged it should be above your rear axel on the drivers side by the frame.I had the same problem with my ford expidition a few months ago
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Old 02-29-2012, 09:51 PM   #12
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right!!,,,,lol....start with the fuel pressure regulator....it's at the end of the fuel rail that supplies the injectors, (on top of the motor)....pull the hose off the vacuum side of the regulator and see if there's gas present....if there is, the regulator is no good....on a side note, you might wanna buy you a Haynes or a Chilton manual.....they help loads when first learning...
Thanks, I do have the Haynes!!
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Old 02-29-2012, 09:53 PM   #13
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If that happened, it should have been picked up by the inline fuel filter....might wanna change that first off...
I did change the fuel filter a few days before it would not start
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Old 02-29-2012, 10:09 PM   #14
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I say regulator,how old are your injectors
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Old 02-29-2012, 11:07 PM   #15
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Could be your fuel filter is clogged it should be above your rear axel on the drivers side by the frame.I had the same problem with my ford expidition a few months ago
Thanks! Yes I changed it just days before it went out (about 7 months ago). It has been sitting up since but it was changed..
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Old 02-29-2012, 11:12 PM   #16
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I say regulator,how old are your injectors
I am not sure how old they are. I have never changed them, I just bought this Jeep less than a year ago.
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Old 03-02-2012, 08:44 AM   #17
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Could be your fuel filter is clogged it should be above your rear axel on the drivers side by the frame.I had the same problem with my ford expidition a few months ago
The same thing happened to my YJ and sure enough it was the filter after i replaced it it ran like new
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Old 03-02-2012, 11:29 AM   #18
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Fuel filter is located on left side frame rail just under driver door. Two bolts loosens skid plate and flar head or pliers to loosens hoses. Make sure the side of filter saying "out" is facing the front of jeep otherwise filter will be on backwards and wont work right. Also check to make sure the old one isn't backwards. Remembe to also check all vacum lines. I jus changed filter and pump and ended up being a loose vac line going into intake manifold. Just saying...
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Old 03-03-2012, 10:45 AM   #19
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Never would believe

Well.. after the fuel pump was changed and changed again the next day... and then we changed the in line filter again... and the fuel pump fuse and relay...... the fuel pump would NEVER make a sound... could not figure out why we didnt hear anything... then someone came over and found a toggle switch on the floor board hanging next to the driverseat.. the wires were burnt.... he said whats this?? we had no clue it was there... so he pulled it off, rewired it.. and BAM!!! the pump turned on..... I guess it was there for theft before it went bad LOL... sucks but atleast we found it before we changed a million more things hahahahaha Thanks everyone for the advice!!!!!!
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Old 03-03-2012, 05:38 PM   #20
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LOL....that's crazy

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