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 2:30 pm
Location:

Re: F134 fouling plugs after rebuild

Post by portajon » Sun Sep 01, 2019 4:13 pm

BTW.... elevation here is about 4,300 feet. Not something I have needed to account for on any of the other equipment here.

Also... I did order a vacuum gauge. Maybe be here Friday if I am lucky. Probably next Monday. Mail is slow to get there.


Joe Gopan
Jeep Heaven
Posts: 49841
Joined: Sun Mar 02, 2008 12:37 pm
Location: Proving Ground

Re: F134 fouling plugs after rebuild

Post by Joe Gopan » Tue Sep 03, 2019 5:35 am

Intake Valve Guides and Packings (Seals) are still suspect.
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 2:30 pm
Location:

Re: F134 fouling plugs after rebuild

Post by portajon » Fri Sep 06, 2019 1:30 pm


portajon
G-Corporal
G-Corporal
Posts: 26
Joined: Sun Aug 25, 2019 2:30 pm
Location:

Re: F134 fouling plugs after rebuild

Post by portajon » Fri Sep 06, 2019 1:31 pm

Youtube video of engine running here;

https://youtu.be/9aOBRcqX12k

Joe Gopan
Jeep Heaven
Posts: 49841
Joined: Sun Mar 02, 2008 12:37 pm
Location: Proving Ground

Re: F134 fouling plugs after rebuild

Post by Joe Gopan » Fri Sep 06, 2019 2:48 pm

Sounds like a little bit of everything going on. Right off the bat I woukd be concerned with crankcase dilution, if it is excessive it could ruin your rings and bearings.
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

User avatar
Scoutpilot
G-Lieutenant General
G-Lieutenant General
Posts: 7323
Joined: Sun May 28, 2006 1:22 pm
Location: Asheboro, NC

Re: F134 fouling plugs after rebuild

Post by Scoutpilot » Fri Sep 06, 2019 3:43 pm

definitely running too rich. Do you have a vacuum reading?
'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

Joe Gopan
Jeep Heaven
Posts: 49841
Joined: Sun Mar 02, 2008 12:37 pm
Location: Proving Ground

Re: F134 fouling plugs after rebuild

Post by Joe Gopan » Fri Sep 06, 2019 11:58 pm

It is obvious that there is a fuel delivery issue, but I woulld also suggust that you also recheck the Oil Pump (timing slot) for proper installation @ TDC, the spark Plug Wires for firing order(1342) and the Timing.
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

User avatar
artificer
banned
Posts: 13558
Joined: Tue Jul 11, 2006 10:46 am
Location: SINGAPORE

Re: F134 fouling plugs after rebuild

Post by artificer » Sat Sep 07, 2019 3:08 am

Scoutpilot wrote:
Fri Sep 06, 2019 3:43 pm
Do you have a vacuum reading?
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 2:30 pm
Location:

Re: F134 fouling plugs after rebuild

Post by portajon » Sat Sep 07, 2019 6:23 am

Ben Dover wrote:
Fri Sep 06, 2019 11:58 pm
It is obvious that there is a fuel delivery issue, but I woulld also suggust that you also recheck the Oil Pump (timing slot) for proper installation @ TDC, the spark Plug Wires for firing order(1342) and the Timing.
Timing, according to my light, is correct. I did wonder about the oil pump installation, but it times up to the marks fine. Firing order is correct.

portajon
G-Corporal
G-Corporal
Posts: 26
Joined: Sun Aug 25, 2019 2:30 pm
Location:

Re: F134 fouling plugs after rebuild

Post by portajon » Sat Sep 07, 2019 6:23 am

artificer wrote:
Sat Sep 07, 2019 3:08 am
Scoutpilot wrote:
Fri Sep 06, 2019 3:43 pm
Do you have a vacuum reading?
I do not have a vacuum reading.

portajon
G-Corporal
G-Corporal
Posts: 26
Joined: Sun Aug 25, 2019 2:30 pm
Location:

Re: F134 fouling plugs after rebuild

Post by portajon » Sat Sep 07, 2019 6:25 am

Ben Dover wrote:
Fri Sep 06, 2019 2:48 pm
Sounds like a little bit of everything going on. Right off the bat I woukd be concerned with crankcase dilution, if it is excessive it could ruin your rings and bearings.
Still running the break in oil. Hasn't traveled more than a few miles. Will check it for any presence of fuel.

jnissen
G-Sergeant Major
G-Sergeant Major
Posts: 150
Joined: Sun Dec 16, 2018 9:43 pm
Location:
Contact:

Re: F134 fouling plugs after rebuild

Post by jnissen » Sat Sep 07, 2019 7:58 am

Run it without the snorkel tube attached. Verify the choke isn’t closing or not attached properly to the cable. Finally once a vacuum gauge shows up take a reading and then verify fuel pressure with same gauge. They often are dual use. Report back. If the needle isn’t properly pinching off fuel it will dump excess down throat of carb.


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

User avatar
artificer
banned
Posts: 13558
Joined: Tue Jul 11, 2006 10:46 am
Location: SINGAPORE

Re: F134 fouling plugs after rebuild

Post by artificer » Sat Sep 07, 2019 1:08 pm

The last post indicating removing the cross over tube is a good suggestion as an overfilled oil bath air cleaner will cause choking/running rich. https://www.militarytrader.com/military ... er_service
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 2:30 pm
Location:

Re: F134 fouling plugs after rebuild

Post by portajon » Sat Sep 07, 2019 1:52 pm

New carburetor and vacuum gauge should be here next week.

portajon
G-Corporal
G-Corporal
Posts: 26
Joined: Sun Aug 25, 2019 2:30 pm
Location:

Re: F134 fouling plugs after rebuild

Post by portajon » Sat Sep 07, 2019 1:54 pm

Have run the engine quite Abit with the oil bath out of play. That is eliminated as the culprit.


Post Reply

Return to “CJ Technical Knowledge Base”

Who is online

Users browsing this forum: No registered users and 17 guests