Jeep Wrangler Forum - Reply to Topic
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ Tech Forum > bucking sputter at operating temp

Join Wrangler Forum Today


Thread: bucking sputter at operating temp Reply to Thread
Title:
  
Message:
Post Icons
You may choose an icon for your message from the following list:
 

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Additional Options
Miscellaneous Options

Topic Review (Newest First)
12-03-2013 03:57 AM
CHL Thanks rhd.
12-02-2013 12:48 PM
rhd_yj
Quote:
Originally Posted by CHL View Post
I'm having a similar problem, what and where is the cps?
On the transmission bell housing at around the 11:00 position (if your looking from back of the tranny to the front) 2 bolts hold it on and you should follow the wire through the firewall and should see a clip around the fuel rail
12-02-2013 12:18 PM
CHL I'm having a similar problem, what and where is the cps?
06-20-2013 12:56 PM
forsaken82 Fixed!
06-19-2013 09:27 PM
forsaken82 Disconnected cps cleaned connections and packed with dielectric grease. No sputter on way home... if i was a betting man id bet it will be back but we will see after a longer drive tom.
06-19-2013 12:59 PM
forsaken82 another forum suggested the cps, could this cause it without throwing a code? only code im actually getting is speed sensor which i dont understand since i replaces it already.
06-19-2013 11:46 AM
forsaken82 Still doing it. Seems to get really bad if I hit a bump while it is doing it.
06-19-2013 08:17 AM
forsaken82 checked fuel pressure. its sitting about 52-53psi, bought a temp sensor while i was there. ill let you know if it did anything after i drive home for lunch.

going to the lake camping this weekend so i need to get it fixed.... im gonna hate it if i have to take my charger. its just not the same!
06-19-2013 06:59 AM
forsaken82 Gonna check fuel pressure. 45-55 psi right?
06-19-2013 06:03 AM
forsaken82 I thought fuel pump too but it doesn't do it all the time. Seems to go through spurts.
06-19-2013 05:59 AM
kik It sounds like you have a bad/weak fuel pump. You're probably not getting enough fuel pressure under load.
06-18-2013 10:32 PM
jokerchief462 Plug wires??? You will see them sparking in the dark.

Ecu sets the timing and fuel mixture based on inputs. So the temp sensor or some if your wiring maybe.
06-18-2013 07:45 PM
forsaken82 Its just under load. She idles perfect.
06-18-2013 07:38 PM
goatman Is it at any rpm, or just going down the road, or just idle? Mine sputters around at idle because the TB and IAC are dirty. It has a hard time exactly modulating how much air it is getting at idle so it hunts around. Need to get some carb cleaner and go to town.
06-18-2013 07:04 PM
forsaken82 Valucraft/TruGrade/Coolant Temperature Sensor (SU326VC) | 1994 Jeep Wrangler 4WD 6 Cylinders S 4.0L MFI | AutoZone.com


This one right?
06-18-2013 06:45 PM
Redrider94 The temp sensor is in the t-stat housing, the ECM uses this sensor to make adj to the fuel system. This sensor has two wires to it.

The temp sending unit is what the gauge uses, it is located on the drivers side rear of the engine by the end of the fuel rail kinda under a bundle of wires. This sender only has one wire.
06-18-2013 06:33 PM
forsaken82 Wouldn't that cause my gauge to read off too? I assume your talking about the coolant temp sensor
06-18-2013 05:40 PM
Garyk Check your temp sensor. If ecm thinks engine is cold it will make it run rich..
06-18-2013 05:05 PM
forsaken82
bucking sputter at operating temp

I have a 94 4.0 with 160k on it. It sputters,bucks and jumps once it reaches operating temp. So far I have changed tps, o2 sensor, coil, dist cap and rotor button, fresh oil and gas, sea foamed intake, ran a propane torch with no fire over the vac lines with no idle change. Any ideas?

Posting Rules
You may post new threads
You may 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


All times are GMT -5. The time now is 12:49 PM.



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