Sputtering - 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 03-02-2014, 06:36 PM   #1
Newb
 
Join Date: Feb 2014
Posts: 14
Sputtering

My 95 yj seems to sputter when accelerating and it tends to idle at low rpms 500-800 any reason for this ? 2.5 motor

Dakotawhisnant is offline   Quote
Old 03-02-2014, 07:04 PM   #2
Jeeper
 
0III0forlife's Avatar
 
Join Date: Mar 2012
Location: Ridgway, Pa.
Posts: 3,832
Images: 6
Normal idle is from 600-850. The first thing that comes to mind for sputtering is a vacuum leak. possibly a loose manifold bolt where it bolts to the head?

Try spraying some carb cleaner around the intake manifold and see if the idle changes when you do it.

__________________
'87 YJ, 4.2L built and bored, 8.5" of lift, 8.8 rear, AX15/NP 231, Tom Woods drive shafts, Flat fenders, 12,000LB winch, Custom bumpers, Rattle can paint job. Never completed...
0III0forlife is offline   Quote
Old 03-02-2014, 07:28 PM   #3
Jeeper
 
Jeeprich25's Avatar
 
Join Date: Sep 2010
Posts: 728
Mine did that for a while. Had a split in the vacuum line to the map sensor. Then I found the red vac line broken behind the passenger side near the valve cover. Check there too.
__________________
1990 Jeep Wrangler YJ. 2.5L. Bone Stock, mostly.

"I'd have more money for upgrades if it didn't break every week."
Jeeprich25 is offline   Quote
Old 03-02-2014, 08:09 PM   #4
Newb
 
Join Date: Feb 2014
Posts: 14
Checked all those things guys even a new map sensor and a tps on the way
Dakotawhisnant is offline   Quote
Old 03-02-2014, 10:27 PM   #5
Jeeper
 
Join Date: Feb 2014
Location: soddy daisy tn
Posts: 20
Same problem. I looked and looked online trying to fix it. It would almost hiccup a lot when taking off or speeding up it ended up being the crankshaft position sensor on the top of the transmission pointed to rears the flywheel. Hope this helps
Xj-jeep-yj is offline   Quote
Old 03-02-2014, 10:28 PM   #6
Jeeper
 
OverkillYJ's Avatar
 
Join Date: Jun 2012
Location: Philadelphia, PA
Posts: 2,904
Quote:
Originally Posted by Xj-jeep-yj View Post
Same problem. I looked and looked online trying to fix it. It would almost hiccup a lot when taking off or speeding up it ended up being the crankshaft position sensor on the top of the transmission pointed to rears the flywheel. Hope this helps
Either that or the tps.
__________________
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
Old 03-02-2014, 10:30 PM   #7
Jeeper
 
Join Date: Feb 2014
Location: soddy daisy tn
Posts: 20
Only think about the throttle position sensor going out is that it would sputter almost constant one would think
Xj-jeep-yj is offline   Quote
Old 03-02-2014, 10:42 PM   #8
Newb
 
Join Date: Feb 2014
Posts: 14
Yeah I thought that too I just want my jeep to run smooth, it didn't act up UNTILL the plugs and wires and drive belt were changed
Dakotawhisnant is offline   Quote
Old 03-02-2014, 10:51 PM   #9
Jeeper
 
OverkillYJ's Avatar
 
Join Date: Jun 2012
Location: Philadelphia, PA
Posts: 2,904
Quote:
Originally Posted by Xj-jeep-yj View Post
Only think about the throttle position sensor going out is that it would sputter almost constant one would think
Not always. Mine did it only when accelerating for a few weeks before it got bad enough to affect it while at speed. Then I replaced it of course, but I was able to drive around with it fine. Jumped and sputtered when starting out though.

__________________
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

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 12:21 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