No start issue. - JeepForum.com
 
LinkBack Thread Tools
post #1 of 3 Old 06-25-2013, 03:45 PM Thread Starter
chance_p
Registered User
2008 WK 
 
Join Date: Aug 2006
Location: Sioux City
Posts: 896
No start issue.

Here's a breakdown of what I am dealing with...

Filled up with gas, started Jeep, idle jumped to about 2k rpm's and then dropped to normal. It hasn't done anything like that since I cleaned the TB and IAC 8 months ago. I got on the highway and 50 miles later it died out of no where.

Check engine light came on, codes read p1491 (never had this code) and p0138 (had this code pop up once a month and then go away upon restart for the past 4 months, 02 sensor bank 2). I am under the impression that this is the 02 sensor behind the cat, and therefore will have no effect on the Jeep not starting, which is why I have not done anything about it. Is that correct?

I have checked all fuses and relays.
Fuel pump primes and I have pressure at the rail (no gauge, just sprayed fuel into a cup at the valve, seems fine)
CKPS checked out okay with a volt meter (infinite resistance between B and C), all gauges work fine.
I have spark, although not sure how strong it is. (removed plug, held threads to block and had assistant crank the motor)
Tried starting in Neutral, no dice.
Tried starting with all different throttle positions, nothing changes.

Can anyone point me in a certain direction as to where to go from here? I cleared the p1491 code and it hasn't come back. Could the cam position sensor be bad? I don't know if I would still get spark if it was bad. I'm thinking I need to acquire a fuel pressure gauge and check that, as well as have someone with a bit more experience see if I am getting sufficient spark.

Thanks for any help.


2008 WK 4.7 QTII - Daystar BB - Bilstein 4600's - JK Moabs 1/8" spacers - 265/70 Cooper AT/3
chance_p is offline  
Sponsored Links
Advertisement
 
post #2 of 3 Old 06-25-2013, 05:55 PM
CJ7-Tim
Real Jeeps have dents
 
CJ7-Tim's Avatar
2000 XJ Cherokee 
 
Join Date: Apr 2002
Location: out in the garage - Minneapolis
Posts: 24,529
Fix the known problems, and see if the other issues clear up.

P0138 JEEP - O2 sensor 1/2 Circuit high

Possible causes

- Faulty Rear Heated Oxygen Sensor Bank 1
- Rear Heated Oxygen Sensor Bank 1 harness is open or shorted
- Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection
- Intake air leaks
- Exhaust gas leaks




P1491 Rad Fan Control Relay Circuit.

An open or shorted condition detected in the radiator fan control relay control circuit. This includes PWM solid state relays.

.

A recent Gallup public opinion poll shows the NRA, at 58% approval, has a higher approval rating than either Hillary Clinton or Barack Obama.

Progressive Liberalism: Bringing you new Healthcare ideas so wonderful, they have to include mandatory participation ...

Originally Posted by Ronald W. Reagan: Government is not the solution to our problems; Government is the problem.
CJ7-Tim is offline  
post #3 of 3 Old 06-25-2013, 08:17 PM Thread Starter
chance_p
Registered User
2008 WK 
 
Join Date: Aug 2006
Location: Sioux City
Posts: 896
I was hoping you would reply Tim.

I have a cracked exhaust manifold, but all of the wires and connections are perfect. Ill throw a new sensor in though because they are cheap enough. This couldnt possibly cause my no start could it?

I went through and cleaned up all of my connections and cleared the codes. The Cel hasnt come back on in my attempts to start the Jeep.

2008 WK 4.7 QTII - Daystar BB - Bilstein 4600's - JK Moabs 1/8" spacers - 265/70 Cooper AT/3
chance_p is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com 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 e-mail address for yourself.



Email Address:
OR

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.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



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
Trackbacks are Off
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome