95 yj missing - JeepForum.com

 
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post #1 of 9 Old 03-16-2016, 08:32 AM Thread Starter
BillyC85
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95 yj missing

Hi everyone I'm new to this and I just can not figure out why my 95 wrangler 4.0 is missing sometimes. It pulls up a code 27 and it starts to miss when a traffic lights and the check engine light comes on only once in a while . The next week it runs fine and all the sudden it starts doing it again. It comes and goes and I don't get it. Any help would be appreciated

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post #2 of 9 Old 03-16-2016, 10:19 AM
ryan_h
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1995 YJ Wrangler 
 
Join Date: May 2011
Location: marietta
Posts: 178
Check your fuel injector wires, make sure everything is connected and there are is no bare wire showing or loose connections.
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post #3 of 9 Old 03-16-2016, 11:01 AM
mike134
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1989 YJ Wrangler 
 
Join Date: Aug 2014
Location: Cleveland
Posts: 4,220
start with the basics. update everything that has not been recently tuned up. You can NEVER go wrong by keeping maintenance up to date (i.e. you have to do these things anyway):

clear your codes by disconnecting th ebattery for a couple minutes
fuel filter
champion copper spark plug
plug wires
distributor cap
rotor
fuel injection cleaner (if you're running through a lot of quality gas, you don't need this. if you let the jeep sit for weeks at a time, then use it regularly).
clean throttle body
clean IAC valve (attached to throttle body)
clean all battery wire connections (both ends of each wire)
disconnet the fuel injetion wires one at a time, clean them with electrical connection cleaner spray, pack with dielectric grease, then reconnect. Do this for every other electrical connection you can find (although a FI connector is probably your issue with code 27).

I also wouldn't hesitate to run a can of Mopar combustion chamber cleaner through the engine. it's about $6 on amazon.

If there is no improvement, reread the new codes to make sure 27 comes back, then come back and we can run you through looking for frayed wires and node lights.
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post #4 of 9 Old 03-16-2016, 12:51 PM Thread Starter
BillyC85
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Thanks guys and I have done all the tune up stuff your talking about and I have noticed the plug going to one of the fuel injecters comes off real easy the side of it is broke a little
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post #5 of 9 Old 03-16-2016, 12:59 PM
mike134
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1989 YJ Wrangler 
 
Join Date: Aug 2014
Location: Cleveland
Posts: 4,220
you probably found your issue then.

Which side of the connector is broken? injector side or wire side?

broken wire side is cheaper to fix, broken injector side is easier to fix.
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post #6 of 9 Old 03-16-2016, 01:00 PM Thread Starter
BillyC85
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Wire side where it clips
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post #7 of 9 Old 03-16-2016, 01:02 PM Thread Starter
BillyC85
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You no if like autozone sales those pigtails
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post #8 of 9 Old 03-16-2016, 01:03 PM
mike134
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1989 YJ Wrangler 
 
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Location: Cleveland
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ah, you'll want to splice in a new connector then. I'd go to the local pull-a-part or pick-and-pull and cut the wire connector (with plenty of extra wire) off from a cherokee then splice it in. It'll be $2 for admission to the park and probably a couple bucks for the wire and clip.

I'd almost wish it was on the injector side so I could just replace it and be done with it all
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post #9 of 9 Old 03-16-2016, 01:17 PM
ryan_h
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1995 YJ Wrangler 
 
Join Date: May 2011
Location: marietta
Posts: 178
Fuel injector connectors are $5 at advance auto. Not worth the hassle of dealing with the pull-a-part. Get that, some heat shrink, and then a cheap harbor freight soldering iron and a little rosin core solder wire. Takes about 10 minutes to install.
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