F134 fouling plugs after rebuild

1945 - 196*, Willys CJ series, questions, discussions, regarding anything related to the post war jeep.®
portajon
G-Corporal
G-Corporal
Posts: 26
Joined: Sun Aug 25, 2019 3:30 pm

Re: F134 fouling plugs after rebuild

Post by portajon » Sat Aug 31, 2019 9:10 am

Carb is what I presume to be the original Carter YF single barrel.

User avatar
Scoutpilot
G-Lieutenant General
G-Lieutenant General
Posts: 6494
Joined: Sun May 28, 2006 2:22 pm
Location: Asheboro, NC

Re: F134 fouling plugs after rebuild

Post by Scoutpilot » Sat Aug 31, 2019 9:28 am

Now then, regarding the float setting. I need to know the composition of the needle in the seat. All metal or rubber-tipped?
'70-'71 'A' Batt., 377th FA, 101AB
(Slicks and LOH's)(Col's LOH Pilot)
'71-72 CHARLIE TROOP,
16TH AIR CAV, 1ST AVN BDE (AEROSCOUTS)
LOW LEVEL HELL.
'46 CJ2A
'47 CJ2A
'48 CJ2A
'48 B1PW126
'69 CJ5

portajon
G-Corporal
G-Corporal
Posts: 26
Joined: Sun Aug 25, 2019 3:30 pm

Re: F134 fouling plugs after rebuild

Post by portajon » Sat Aug 31, 2019 10:41 am

Rubber tip..

User avatar
artificer
- R.A.E.M.E -
Posts: 13577
Joined: Tue Jul 11, 2006 11:46 am
Location: SINGAPORE

Re: F134 fouling plugs after rebuild

Post by artificer » Sat Aug 31, 2019 10:52 am

Reading through this thread may help you out:
viewtopic.php?f=4&t=309443
John GIBBINS Member Institute of Automotive Mechanical Engineers [Ret], ASE Master Medium/Heavy Truck & Auto Technician USA -2002 Licensed Motor Mech NSW MVIC 49593 Current 2015
TO DIAGNOSE, TROUBLESHOOT OR FAULT FIND ANY AUTO SYSTEM....
Understand how system parts interact with one another. GOOD parts can then be established & the NOT GOOD problem/s part/s isolated for repair or replacement.

portajon
G-Corporal
G-Corporal
Posts: 26
Joined: Sun Aug 25, 2019 3:30 pm

Re: F134 fouling plugs after rebuild

Post by portajon » Sat Aug 31, 2019 11:07 am

artificer wrote:
Sat Aug 31, 2019 10:52 am
Reading through this thread may help you out:
viewtopic.php?f=4&t=309443
Yup. I read my first post where I said that I thought it was a carburetor issue.


User avatar
Scoutpilot
G-Lieutenant General
G-Lieutenant General
Posts: 6494
Joined: Sun May 28, 2006 2:22 pm
Location: Asheboro, NC

Re: F134 fouling plugs after rebuild

Post by Scoutpilot » Sat Aug 31, 2019 12:13 pm

Float setting should be 9/32" measured top inverted, at the belly of the float, with no gasket in place.
'70-'71 'A' Batt., 377th FA, 101AB
(Slicks and LOH's)(Col's LOH Pilot)
'71-72 CHARLIE TROOP,
16TH AIR CAV, 1ST AVN BDE (AEROSCOUTS)
LOW LEVEL HELL.
'46 CJ2A
'47 CJ2A
'48 CJ2A
'48 B1PW126
'69 CJ5

portajon
G-Corporal
G-Corporal
Posts: 26
Joined: Sun Aug 25, 2019 3:30 pm

Re: F134 fouling plugs after rebuild

Post by portajon » Sat Aug 31, 2019 2:34 pm

Thanks again for the advice.

Set float. Reassmebled carb. Checked vacuum for leaks. None found. Checked dwell once more. Cleaned plugs.

It's running worse than ever. Ugh.

User avatar
Scoutpilot
G-Lieutenant General
G-Lieutenant General
Posts: 6494
Joined: Sun May 28, 2006 2:22 pm
Location: Asheboro, NC

Re: F134 fouling plugs after rebuild

Post by Scoutpilot » Sat Aug 31, 2019 5:19 pm

Can you post a video of it running?
'70-'71 'A' Batt., 377th FA, 101AB
(Slicks and LOH's)(Col's LOH Pilot)
'71-72 CHARLIE TROOP,
16TH AIR CAV, 1ST AVN BDE (AEROSCOUTS)
LOW LEVEL HELL.
'46 CJ2A
'47 CJ2A
'48 CJ2A
'48 B1PW126
'69 CJ5

jnissen
G-Staff Sergeant
G-Staff Sergeant
Posts: 60
Joined: Sun Dec 16, 2018 11:43 pm
Contact:

Re: F134 fouling plugs after rebuild

Post by jnissen » Sat Aug 31, 2019 6:45 pm

While running and after shutoff look down throat of carb. You likely need to rebuild carb and I’d replace float if it’s even suspect.


Sent from my iPad using Tapatalk
Jim Nissen
1955 M38A1
Patent Plate MD74784
Engine Plate MD85578
BS Hood Number 20974784

Joe Gopan
Gee Addict
Posts: 47714
Joined: Sun Mar 02, 2008 2:37 pm
Location: Proving Ground

Re: F134 fouling plugs after rebuild

Post by Joe Gopan » Sat Aug 31, 2019 6:53 pm

Smell the oil on the dipstick,,any gasoline smell or dilution?
2011 MVPA PIONEER AWARD - MVPA #1064
HONOR GRAD-WHEELED VEHICLE MECHANIC SCHOOL 1960 - US ARMY ORDNANCE SCHOOL(MACHINIST) ABERDEEN PG 1962 - O-1 BIRD DOG CREWCHIEF - 300,000+TROUBLE FREE M-38A1 MILES
LIFE MEMBER AM LEGION-40/8-DAV
7 MIL SPEC MAINTAINED MV'S
COL. BRUNO BROOKS (ARMY MOTORS) IS MY HERO

Wolfman
G-Lieutenant General
G-Lieutenant General
Posts: 5094
Joined: Sat Jan 12, 2008 7:25 am
Location: Tipton,In.

Re: F134 fouling plugs after rebuild

Post by Wolfman » Sun Sep 01, 2019 9:09 am

F-134. My fault on the intake gasket !! :oops:
Sounds like the carb. as you first thought.
4 hours up the Imnaha Canyon. ?? Not sure where that is. Any chance you could get your hands on another carb. to see if that helps. ???
Fuel pressure over the moon ???
Take the carb. off. Set it on the bench and connect an auxiliary, elevated fuel tank. See if it floods just sitting there. ???
9/32 float level ? That isn't much. But I am no YF carb specialist. Just thinking. You set the float to this and it ran worse. Maybe lowering the float level ???
This may be a little off the wall. Maybe not.
Had an M-38 ( I know, that is an L-134 ) in the shop that ran really bad. Fought this one for a while. Turned out the owner had adjusted the valves. Had them all way too tight. Ran bad cold and got worse as it warmed up.
My point, had to set the idle up to keep it running. Which made the carb. appear to flood over because of the high idle setting. Fouled out the plugs also.
After going over the ignition and fuel system, several times, adjusted the valves. Readjusted the carb. and Voilà, it is still purring like a kitten today.
Just a flashback.
Mike Wolford
CJ-2A
VEP GPW
Comm./Inst. SEL
AOPA ( 45 yrs)
EAA ( 45 yrs)
4th Inf. Div. - 5th Inf. Div. - 2nd Armor Div. - CIB

User avatar
artificer
- R.A.E.M.E -
Posts: 13577
Joined: Tue Jul 11, 2006 11:46 am
Location: SINGAPORE

Re: F134 fouling plugs after rebuild

Post by artificer » Sun Sep 01, 2019 11:31 am

So this Jeep is running @ altitude around 8000 feet?
That does affect carburettors & cause rich running!
Depending on altitude additional ignition timing advance/mixture adjustment/s are probably required to compensate with the less dense air.
That vacuum gauge would be really beneficial.

https://youtu.be/8FqEjQsJfIU Don't forget to look @ the comments!
https://books.google.com.au/books?id=0d ... gs&f=false
https://www.carburetor-parts.com/assets ... 50-732.pdf
John GIBBINS Member Institute of Automotive Mechanical Engineers [Ret], ASE Master Medium/Heavy Truck & Auto Technician USA -2002 Licensed Motor Mech NSW MVIC 49593 Current 2015
TO DIAGNOSE, TROUBLESHOOT OR FAULT FIND ANY AUTO SYSTEM....
Understand how system parts interact with one another. GOOD parts can then be established & the NOT GOOD problem/s part/s isolated for repair or replacement.

Joe Gopan
Gee Addict
Posts: 47714
Joined: Sun Mar 02, 2008 2:37 pm
Location: Proving Ground

Re: F134 fouling plugs after rebuild

Post by Joe Gopan » Sun Sep 01, 2019 1:29 pm

Just to satisfy my curiosity, can you remove the rocker arm cover and check to see if the Intake Valve Packings (Seals) are not just laying loose over the valve stems?
2011 MVPA PIONEER AWARD - MVPA #1064
HONOR GRAD-WHEELED VEHICLE MECHANIC SCHOOL 1960 - US ARMY ORDNANCE SCHOOL(MACHINIST) ABERDEEN PG 1962 - O-1 BIRD DOG CREWCHIEF - 300,000+TROUBLE FREE M-38A1 MILES
LIFE MEMBER AM LEGION-40/8-DAV
7 MIL SPEC MAINTAINED MV'S
COL. BRUNO BROOKS (ARMY MOTORS) IS MY HERO

Joe Gopan
Gee Addict
Posts: 47714
Joined: Sun Mar 02, 2008 2:37 pm
Location: Proving Ground

Re: F134 fouling plugs after rebuild

Post by Joe Gopan » Sun Sep 01, 2019 1:41 pm

My F-134 Powered M-38A1 Jeep had no indication of power loss or rich mixture while climbing 9000' Mt. Washington.
2011 MVPA PIONEER AWARD - MVPA #1064
HONOR GRAD-WHEELED VEHICLE MECHANIC SCHOOL 1960 - US ARMY ORDNANCE SCHOOL(MACHINIST) ABERDEEN PG 1962 - O-1 BIRD DOG CREWCHIEF - 300,000+TROUBLE FREE M-38A1 MILES
LIFE MEMBER AM LEGION-40/8-DAV
7 MIL SPEC MAINTAINED MV'S
COL. BRUNO BROOKS (ARMY MOTORS) IS MY HERO

portajon
G-Corporal
G-Corporal
Posts: 26
Joined: Sun Aug 25, 2019 3:30 pm

Re: F134 fouling plugs after rebuild

Post by portajon » Sun Sep 01, 2019 5:11 pm

Thanks for all the advice gentleman. Something is amiss here. Not sure just what. Took the day off today from working on it. I do have a camera that mounts to my hat, i usually take recreational videos with it but yeah.... I think maybe I will go through all the motions and film it and maybe you guys can pick up on what is going on. Something isn't right. This is a brand new motor. The plugs foul literally in 30 seconds now.... Maybe tomorrow or Tuesday i will make a video and post up.

Thanks again for all the help.

Post Reply

Return to “CJ Technical Knowledge Base”

Who is online

Users browsing this forum: No registered users and 1 guest