The red YJ aka (Elmo) - Page 4 - JeepForum.com

Reply
 
LinkBack Thread Tools
post #46 of 141 Old 12-23-2013, 10:28 PM
Que89YJ
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit
Posts: 22,863
31 psi. I would start with the psr. test. Check bleed down time too. It should stay above 20 for moor than 20 minutes. This checks for leaking injectors and check valve.


Fault codes:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Mean Max pics of everything:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

How to use Google to search the forum:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

No Start:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Que89YJ is offline  
Sponsored Links
Advertisement
 
post #47 of 141 Old 12-23-2013, 10:56 PM Thread Starter
2jeeps1stang
Registered User
1987 YJ Wrangler 
 
Join Date: Nov 2009
Location: NW Indiana
Posts: 352
Thank you. I'll try to get one from work tomorrow

It used to be 2 jeeps..Now it's 4

http://www.jeepforum.com/forum/f22/red-yj-aka-elmo-1357728/
2jeeps1stang is offline  
post #48 of 141 Old 12-24-2013, 07:57 AM Thread Starter
2jeeps1stang
Registered User
1987 YJ Wrangler 
 
Join Date: Nov 2009
Location: NW Indiana
Posts: 352
So for kicks today I checked the fuel rail bleeder valve before starting it.. Nothing came out. It was cold obviously. Think an injector is leaking ?
Mechanics at work said try some carb cleaner around the intake manifold see if a gasket is bad. I've yet to try that too. Again what gets me is only when it is cold. Running down the road it is ok. Only hesitates on acceleration every once in a blue moon.

It used to be 2 jeeps..Now it's 4

http://www.jeepforum.com/forum/f22/red-yj-aka-elmo-1357728/
2jeeps1stang is offline  
post #49 of 141 Old 12-24-2013, 12:00 PM
Que89YJ
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit
Posts: 22,863
Lean code is either a low fuel pressure or the most common is a leaking or cracked exhaust manifold. Check for cracks around the collector tubes and loose bolts on the manifold itself.

Fault codes:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Mean Max pics of everything:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

How to use Google to search the forum:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

No Start:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Que89YJ is offline  
post #50 of 141 Old 12-26-2013, 01:19 PM Thread Starter
2jeeps1stang
Registered User
1987 YJ Wrangler 
 
Join Date: Nov 2009
Location: NW Indiana
Posts: 352
Exhaust and the bolts are ok. Again I have to take some cRb cleaner and spray around the gasket for leaks I cannot hear or see. Been working like a dog so I haven't had a evening to mess with anything on the jeep. Hoping to tomorrow and Saturday evening.

More clues.. Last night, sitting in the cold it started up. Had a high but normal idle for about 5-7 seconds. It acted like it was gonna be fine. I didn't touch the gas and then it starting running rich and idling irratic again. Idling below a grand and at times 500 while backfiring.

It used to be 2 jeeps..Now it's 4

http://www.jeepforum.com/forum/f22/red-yj-aka-elmo-1357728/
2jeeps1stang is offline  
post #51 of 141 Old 12-26-2013, 04:15 PM
Que89YJ
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit
Posts: 22,863
Backfiring is very distinct. That is when it is firing the cylinder when the intake port is open and it goes through the intake. Are you sure you had backfiring? That can only be a timing issue.

Fault codes:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Mean Max pics of everything:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

How to use Google to search the forum:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

No Start:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Que89YJ is offline  
post #52 of 141 Old 12-26-2013, 10:42 PM Thread Starter
2jeeps1stang
Registered User
1987 YJ Wrangler 
 
Join Date: Nov 2009
Location: NW Indiana
Posts: 352
Well seems to me it is back firing. The AIT was soaked when I pulled it and the intake definitely smelled like gas. Spark plugs were wet too. Is it possible for the timing to be off only when it's cold? I know that sounds stupid but I mean this is the mighty 4.0 not the 4.2 haha. In that case.. Would a camshaft sensor be to blame? See if I take out the AIT and warm it up with a hair dryer and put it back in, it starts and idles fine even if the rest of the jeep was cold. Maybe a combination of problems and that just "tricked" the PCM into a decent air/fuel mix in that open loop. ?

It used to be 2 jeeps..Now it's 4

http://www.jeepforum.com/forum/f22/red-yj-aka-elmo-1357728/
2jeeps1stang is offline  
post #53 of 141 Old 12-27-2013, 12:41 AM
Que89YJ
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit
Posts: 22,863
Lean fault is a cracked exhaust manifold 9/10 times. If you are flooded that is likely what you have. The ecu thinks there is too much air and dumps fuel to save the engine. Read the fuel pressure look for the exhaust leak

Fault codes:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Mean Max pics of everything:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

How to use Google to search the forum:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

No Start:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Que89YJ is offline  
post #54 of 141 Old 12-29-2013, 04:04 PM Thread Starter
2jeeps1stang
Registered User
1987 YJ Wrangler 
 
Join Date: Nov 2009
Location: NW Indiana
Posts: 352
Checked for leaks in the intake with carb cleaner.Good there. Exhaust leaks I found, tightened up the collector to down pipe bolts. Can't believe I overlooked them. They weren't too loose though. Checked for leaks with smoke and a match. No more leak at that connection. Found a good size "finger" hole where the down pipe turns to go towards the catalytic converter. Could that cause the o2 to read funny? That's some distance away. Also note, again I do not have a muffler on the jeep. I unplugged the o2 and got a 21 + 51 codes. So that tells me the o2 is ok because with it plugged in it is only saying 51. I bled the fuel line after shutting it down. Seemed like air and fuel came out. It was a strong foam string sort of. Waited a couple minutes. Bled it again. More gas and more air. Repeated this 10-15 times over the course of 20 minutes and now I just have air coming out.... It should be nothing coming out, as in zero psi. I haven't gotten my hands on a gauge yet. Believe it or not I've been stupid busy. I also stuck my ear to a screw driver on the injectors. Each one at idle is firing the same rate and making the same noise. At smooth idle. Haven't heard them at rough idle. Does this help decipher any other faults?

It used to be 2 jeeps..Now it's 4

http://www.jeepforum.com/forum/f22/red-yj-aka-elmo-1357728/
2jeeps1stang is offline  
post #55 of 141 Old 12-29-2013, 06:06 PM
Que89YJ
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit
Posts: 22,863
The 51 won't clear until you disconnect the battery for 10sec. Reconnect and drive it for 20 minutes. That's long enough for it to go into closed loop and use the o2 sensor. Anything after the sensor doesn't matter.

Fault codes:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Mean Max pics of everything:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

How to use Google to search the forum:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

No Start:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Que89YJ is offline  
post #56 of 141 Old 12-30-2013, 09:33 AM Thread Starter
2jeeps1stang
Registered User
1987 YJ Wrangler 
 
Join Date: Nov 2009
Location: NW Indiana
Posts: 352
Put the new o2 sensor in. Drove for over 45 mins. Different speeds stop and go,65 mph cruising. No exhaust leaks. And ran really well. Only hesitated "lost power" accelerating once. No lean codes or otherwise. This morning, Being cold... Still a rough start but didn't smell as rich, I was able to flutter the gas and get it warm faster. Within 2 minutes aside from 5-10 which it used to be. The coil was off a parts jeep and could be weak, I checked the wires for shorts and grounding wires also coming from the alternator. Those are all ok. So now... On to checking the fuel psi.

It used to be 2 jeeps..Now it's 4

http://www.jeepforum.com/forum/f22/red-yj-aka-elmo-1357728/
2jeeps1stang is offline  
post #57 of 141 Old 12-30-2013, 10:45 AM
Que89YJ
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit
Posts: 22,863
Check your intake air temp sensor with a meter. I bet it's bad.

Fault codes:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Mean Max pics of everything:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

How to use Google to search the forum:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

No Start:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Que89YJ is offline  
post #58 of 141 Old 12-30-2013, 11:16 AM Thread Starter
2jeeps1stang
Registered User
1987 YJ Wrangler 
 
Join Date: Nov 2009
Location: NW Indiana
Posts: 352
I had replaced it. Maybe the pigtail is bad though? I have the print out for the ohm on it. I'll take a gander

It used to be 2 jeeps..Now it's 4

http://www.jeepforum.com/forum/f22/red-yj-aka-elmo-1357728/
2jeeps1stang is offline  
post #59 of 141 Old 12-30-2013, 12:06 PM
Que89YJ
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit
Posts: 22,863
no..it sounds like it is driving better now

Fault codes:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Mean Max pics of everything:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

How to use Google to search the forum:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

No Start:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Que89YJ is offline  
post #60 of 141 Old 12-30-2013, 12:53 PM Thread Starter
2jeeps1stang
Registered User
1987 YJ Wrangler 
 
Join Date: Nov 2009
Location: NW Indiana
Posts: 352
Yup. Just a rough idle on cold start.I'll mess with the fuel the weekend when I have time.

It used to be 2 jeeps..Now it's 4

http://www.jeepforum.com/forum/f22/red-yj-aka-elmo-1357728/
2jeeps1stang 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



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
Jeep TJ Wrangler 1997 -2004 ,V-6 Conversion Package , Retaining the Stock Jeep 5?? Travisray91 TJ Wrangler Technical Forum 12 10-05-2011 01:50 PM
Got jeep back from shop, coolant level low, jeep running cold. kainers YJ Wrangler Technical Forum 4 10-30-2010 08:51 PM
1997 Jeep Cherokee 6 cylinder engine swap into a 97 Jeep Wrangler? Maverick14 TJ Wrangler Technical Forum 2 08-23-2010 10:26 AM
When driving jeep does not hold idle. Rpms just drop and Jeep stalls myoung YJ Wrangler Technical Forum 9 02-26-2010 10:22 PM
whats wrong with my jeep need answer asap (Jeep won't idle after jump start) Wrangler11 TJ Wrangler Technical Forum 24 11-04-2008 05:46 PM

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 On
Trackbacks are Off
Pingbacks are On
Refbacks are On

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