Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!

2004 Jeep Liberty sport 3.7 misfire cylinder #1

More
6 years 3 months ago #17618 by Rabbit
2004 Jeep Liberty sport 3.7 misfire cylinder #1 was created by Rabbit
Misfire cylinder#1
*I Replaced the spark plug
* I swaped coil
*checked the injentor is firing
*o2's running Rich .800volts bank 1 rear o2
*i checked compression
Cylinder#1 ...90psi misfire
i added oil did not make any difference
90psi
Cylinder#2 ...178psi
any help thank u

Please Log in or Create an account to join the conversation.

More
6 years 3 months ago #17620 by Rabbit
Replied by Rabbit on topic 2004 Jeep Liberty sport 3.7 misfire cylinder #1

Attachment not found

Please Log in or Create an account to join the conversation.

More
6 years 3 months ago #17621 by kostelectronics
Replied by kostelectronics on topic 2004 Jeep Liberty sport 3.7 misfire cylinder #1
It seems that your Cylinder1 have a mechanical Problem (not properly closing valves or borken piston-ring). 90Psi is definetly too low!
Make a leakdown test to figure out, where the pressure goes.

BR from Switzerland
Matthias

Please Log in or Create an account to join the conversation.

More
6 years 3 months ago #17633 by Sterline80
Replied by Sterline80 on topic 2004 Jeep Liberty sport 3.7 misfire cylinder #1
I think you already answered your own question. Next thing I'd do is check with an in cylinder pressure transducer, or pull valve cover and see what you can see.

Please Log in or Create an account to join the conversation.

More
6 years 3 months ago #17639 by gilbert
Replied by gilbert on topic 2004 Jeep Liberty sport 3.7 misfire cylinder #1
God bless you my brothers and sisters.
I just had one with the same problem it had a bent vavle. I removed the vavle cover and found the that the rocker fell off.

Please Log in or Create an account to join the conversation.

More
6 years 3 months ago #17691 by Rabbit
Replied by Rabbit on topic 2004 Jeep Liberty sport 3.7 misfire cylinder #1
i did a leak down test
air comes thru the throttle body

Please Log in or Create an account to join the conversation.

More
6 years 3 months ago #17701 by kostelectronics
Replied by kostelectronics on topic 2004 Jeep Liberty sport 3.7 misfire cylinder #1
You have a not properly closing intake-valve, maybe the same Problem that @gilbert already had. the only Thing i can say is "head up, friend" ;)

BR Matthias

Please Log in or Create an account to join the conversation.

More
6 years 3 months ago #17705 by Ben
Replied by Ben on topic Re:2004 Jeep Liberty sport 3.7 misfire cylinder #1
I had a couple overheat and drop valve seats out of the head holding the valve open

Sent from my SM-N920P using Tapatalk

Please Log in or Create an account to join the conversation.

More
6 years 3 months ago #17711 by arbez
Replied by arbez on topic Re:2004 Jeep Liberty sport 3.7 misfire cylinder #1
Yep, time to pull the head. No other way to go. Burnt or bent valve, or something wrong with the seat. You can pull the Valve Cover & maybe see more symptoms, but fixing it will require the head to be removed.

Please Log in or Create an account to join the conversation.

More
6 years 3 months ago #17722 by Tyler
Replied by Tyler on topic Re:2004 Jeep Liberty sport 3.7 misfire cylinder #1
Another vote to pull the head. Valve seats fall out of these all the time, and cause the valve to hang open.

If you're gonna pull the head, consider getting the timing chain holding tool while you're at it:

www.jbtoolsales.com/otc-522902-timing-chain-holder/

It's not required, but it sure does make the job of resetting timing easier. ;)

Please Log in or Create an account to join the conversation.

Time to create page: 0.228 seconds