'95 YJ Rough idle/running rich/lean? - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ Tech Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 07-03-2012, 07:31 PM   #1
Jeeper
 
Desperado's Avatar
 
Join Date: Jun 2012
Location: Skagit County, Washington
Posts: 999
'95 YJ Rough idle/running rich/lean?

So my YJ is definitely running rich or lean, and it has a rough idle. The tach reads about 450rpm, but the Jeep thumps at around 110 "thumps" per minute...are these connected? If I had a carb'd engine I'd be out there adjusting it, but neither me nor my dad know anything about fuel injection.

Desperado is offline   Quote
Old 07-03-2012, 10:46 PM   #2
Jeeper
 
OverkillYJ's Avatar
 
Join Date: Jun 2012
Location: Philadelphia, PA
Posts: 2,904
I would say it may have something to do with your O2 sensors. That reads your exhaust and says if it need more or less fuel and adjusts the injectors. You may also want to have your injectors proffesionally cleaned. Could also be fuel pump is starting to go. I am listing these assuming you checked the air filter and throttle badge intake making sure there is no debris or other obstructions. All the other things I listed are a pain to do yourself and are better off taking it somewhere, unless you have the proper tools. O2 sensors for example will probably need some serious heat to break free as well as a special socket.
__________________
Complete rebuild axle/engine/everything swap in progress:
Parts already gathered for assembly: 2001 Ford 302, 1990 Mustang GT 5.0 ECU and wiring, NP435, NP205, Pair of axles from 04' F350 SuperDuty (Sterling 10.5 Posi rear, Dana 60HP Front-Both Disk Brakes 3.73 Gears), 37" H1 Tires, 9" lift TJ Coils for 2 link conversion in front, Stage 2 Clutch Kit, 3 Row Aluminum Radiator, Chevy Astro Steering box (4" front Stretch), XJ Rear Leaf Springs (6" Rear Stretch), and lots more.
OverkillYJ is offline   Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




Download our Mobile App

» Featured Product

All times are GMT -5. The time now is 02:07 AM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC