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1977 Jeep CJ5 stalling out

Tiny
SLAKSUMAN
  • MEMBER
  • 1977 JEEP CJ5
  • 4.2L
  • 6 CYL
  • 4WD
  • MANUAL
  • 86,000 MILES
I have a 77 jeep cj5 it sat for 20 years with out running I fixed it up and now it will start but it will stall out after about 2 min and if it does stay running it will start to sputter at about 30 mph in 2nd gear then stall out and not want to say running I can figure it out its got a new gas tank, sending unit, fuel pump, and filter I've cleaned the carb and no luck I have seen that the the choke sticks open a little but I'm just lost on it
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Tuesday, December 17th, 2013 AT 9:33 PM

42 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the choke adjustment and also the EGR valve if its opening and closing
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Wednesday, December 18th, 2013 AT 1:29 AM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,005 POSTS
HEY BOSS MAN!

I'M KINDA IN A HURRY AT THE MOMENT

I'M GONNA SLING YOU A FEW "ANSWERS" TO FLIP THRU AND LOOK OVER......YOU MAY WANNA START O "PAGE ONE" OF SOME OF 'EM

I PERFORMED A 2CARPRO SEARCH USING KEY WORDS LIKE....CJ MEDEVAC....JEEP......TIMING.....TUNING....ETC (YOU CAN ADD MORE AND GET OTHER RESULTS)

PAY ATTENTION TO "MY ANSWERS" AND PICS........THERE MAY BE SOMETHING SIMPLE THAT YOU MISSED..........OR SHOULD DO REGARDLESS TO MAKE THINGS CORRECT!

HERE'S A FEW IN THIS LINK............................

https://www.2carpros.com/search?q=CJ+MEDEVAC+JEEP+TUNING+FILTER+TIMING+&search=Added

HOPEFULLY THAT HELPS SOME........RETURN TO THIS THREAD WITH ANY RESPONSES!!!!

I WILL AID YOU MORE....LATER!...............SOMETIMES IT'S VACUUM CRAP THAT IS NOT RIGHT

GIMME ANY MORE INFO THAT YOU......SEE I LIKE TO KNOW FROM THE OTHER POSTS

LAY MR. HOOD BACK ON THE WINDSHIELD FRAME----REMOVE THE BREATHER!---GIMME SOME FULL ENGINE SHOTS FROM OVERHEAD--LEFT AND RIGHT SIDESAND ONE OF THE WHOLE JEEP, AS WE LIKE TO SEE WHAT JUST PULLED INTO OUR GARAGE!

REPLY TO THIS THREAD!

THE MEDIC

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Wednesday, December 18th, 2013 AT 9:32 AM
Tiny
SLAKSUMAN
  • MEMBER
  • 25 POSTS
It ran fine in till I went to the gas station and put gas in before I used a gas can to put gas in that's when it all started I drove for bout 20 min then it started to stall out now it won't even idle for two min
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Wednesday, December 18th, 2013 AT 11:47 AM
Tiny
SLAKSUMAN
  • MEMBER
  • 25 POSTS
We also adjusted the choke settings and idle setting so it would idle right because it was set high it seemed to work but I drove bout 5 blocks and it stalled out I did notice the coil would get warm way before the motor see some before mention something on that
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Wednesday, December 18th, 2013 AT 11:52 AM
Tiny
SLAKSUMAN
  • MEMBER
  • 25 POSTS
And most of the engine parts are original carb, coil, distributer. Was really just wanting to use it this winter you know
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Wednesday, December 18th, 2013 AT 12:10 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
This cold very well be in need of a carb overhaul especially for sitting so long then adding todays fuel in it. It may have worn out the accelerator pump and power valve as well as who knows what in carb or if it ate the float out in the center which happens quite often with plastic floats.
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Wednesday, December 18th, 2013 AT 4:38 PM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,005 POSTS
LET'S TRY THIS

IT AIN'T GONNA HURT NUTHIN'

https://www.2carpros.com/questions/jeep-wrangler-1988-jeep-wrangler-engine-issues-when-braking

IF YOU DISCONNECT THE FUEL LINE NEAR THE CARB---STICK IT IN A JAR---CRANK THE ENGINE OVER----IS THE FUEL COMING OUT STRONG AND IN SPURTS?.......IF IT'LL IDLE FOR 30 SECONDS, YOU SHOULD GET ABOUT A PINT OF FUEL IN THE JAR

THIS MAY RULE OUT EVERYTHING BACK TO THE TANK...LEAVING THE CARB

I TOO HAVE A '77 I HAVE MADE MANY USER FRIENDLY MODIFICATIONS TO IT

RETURN WITH A GRIN.....I'LL HANG WITH YOU AS LONG AS YOU KEEP RESPONDING

THE MEDIC
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Wednesday, December 18th, 2013 AT 5:03 PM
Tiny
SLAKSUMAN
  • MEMBER
  • 25 POSTS
OK I will try that on Saturday when I'm off I did try seeing if the carb had suction by putting my hand over the air intake like in an awnser you gave someone else and it had plenty and I also disconnected the egr and it did nothing I will get pics for you then to
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Wednesday, December 18th, 2013 AT 9:30 PM
Tiny
SLAKSUMAN
  • MEMBER
  • 25 POSTS
Back to my last post when I started it with out the air cleaner it ran kinda ruff but when I closed the intake with my hand it ran better I also added heat in the gas just incase there was water in the tank and I'm just curious I noticed on the manafold there was a level like thing I have never seen anything like that before and was just wondering what it is for and what it is I'm very thankful you are helpin me every one I talk to is just as lost as me
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Wednesday, December 18th, 2013 AT 10:22 PM
Tiny
SLAKSUMAN
  • MEMBER
  • 25 POSTS
And Friday I will be getting the coil and a distributer cap just in case and so I can trust it more. I don't know if I mentioned that when it stalls at idle its like it was shut off and it will fire back up right a way but when I try to drive I don't want to fire back up and I have to pump the gas a bit. Sorry if I am just giving you info in peaces but I want you to have good details
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Wednesday, December 18th, 2013 AT 10:56 PM
Tiny
SLAKSUMAN
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  • 25 POSTS
I will get you one with no air cleaner on Saturday because my table isn't the best picture taker
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Wednesday, December 18th, 2013 AT 11:13 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
If you can put your hand over the carb and it idles better that means you are cutting air to carb and it will idle better because it has an internal vacuum leak. Either rebuild the carb or get another one.
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Thursday, December 19th, 2013 AT 6:03 AM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,005 POSTS
IT'S SOUNDING LIKE YOU ARE GETTING TOO MUCH AIR----MIS-ROUTED LINES. VACUUM LEAK. OR TOO MUCH GAS. OR CARB/ DISTRIBUTOR ISSUES

DO THIS WELL AWAY FROM STUFF YOU LOVE--WITH A SOPPING WET TOWEL (1ST LINE OF DEFENSE) AND A FIRE EXTINGUISHER (IF NEED-BE!)

GET HIM RUNNING---THEN SPRAY CARB CLEANER AROUND THE BASE OF THE CARB---THEN THE INTAKE MANIFOLD (TOP AND BOTTOM)
THEN ANY WHERE ELSE THERE IS VACUUM LINES OR VACUUM APPLIANCES.I CANNOT TELL IF YOU HAVE A BRAKE BOOSTER IN THE PICS

WE ARE LOOKING FOR THE ENGINE TO DIE OR GO INTO CARDIAC ARREST WHEN THE CARB CLEANER HITS THE VACUUM LEAK AND SUCKS IT IN. WAH-LAH! YOU MAY HAVE FOUND IT!

SEND ME THE PICS. POSES I REQUESTED BEFORE (GOOD LIGHT).I MIGHT CATCH A GLITCH IN HOW THINGS ARE CONNECTED

IT ALSO COULD BE THE CARB. ADJUSTMENTS. OR SOMETHING INTERNAL. LIKE THE FLOATS ARE TOO HIGH (BBD FLOATS ARE BRASS). OR THEY HAVE A HOLE IN 'EM AND ARE SINKING. MR. CARB IS COMPLICATED, SO IF YOU ARE UNSURE, DON'T TAKE HIM APART!

BEFORE YOU BUY BIG STUFF, CONSULT W/ ME!

I MADE YOU A DIAGRAM ABOUT THE EGR

KEEP US POSTED

THE MEDIC
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Thursday, December 19th, 2013 AT 6:20 PM
Tiny
SLAKSUMAN
  • MEMBER
  • 25 POSTS
OK I will do that to marrow and I will get the pics for you
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Friday, December 20th, 2013 AT 6:06 AM
Tiny
SLAKSUMAN
  • MEMBER
  • 25 POSTS
Ok I did what you said with the carb cleaner and I found no vacuum leaks I sprayed all the lines and around the carb and intake found nothing I couldn't get the pics due to it has been raining all day I also did what you wanted me to try with the way to clean the carb out and that acualy did choke it out so I'm still lost on it
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Saturday, December 21st, 2013 AT 4:57 PM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,005 POSTS
WELL THE "RAG THING" SHOULDA CHOKED YOU OUT. IT JUST GOT FLOODED!

HOLDING THE PEDAL TO THE FLOOR, AND CRANKING WILL QUICKLY CLEAR OUT THE EXCESS FUEL AND IT'LL FIRE BACK UP

REPEAT THE PROCESS 2-5 TIMES

THIS MAY NOT FIX YOU. BUT IT WON'T HURT NUTHIN'

THE WHOLE IDEA IS, THE CARB IS SUCKING VACUUM/ AIR INTO THE THROAT. WHEN YOU BLOCKED OFF THE SOURCE, IT WAS STILL DRAWING A VACUUM INSIDE. AS IT "SEARCHED" FOR AIR, THE ONLY PLACE IT COULD GET IT WAS TO SUCK THE FUEL THRU THE INTERNAL PASSAGES IN THE CARB. THIS SOMETIMES WILL CLEAN OUT ANY CRAP THAT IS IN THOSE PASSAGES

. AND YOU HAVE "TIMED IT" AND MADE "CARB ADJUSTMENTS" AS PER THE LINKS I SENT ON THE 1ST PAGE THAT PERTAIN TO TUNING?

WHEN YOUR JEEP IS AT OPERATING TEMP, AND YOU ACTUATE THE THROTTLE A TIME OR TWO, YOUR CHOKE BUTTERFLY IS ALL THE WAY OPEN AND IS STANDING VERTICAL?

GET ME THEM PICS. REMOVE THE BREATHER.L AND R AND TOP OF THE ENGINEWITH THE ENGINE TAKING UP MOST OF THE PICTURE FRAME. THE MORE THE MERRIER. CLOSER IN SHOTS OF THE CARB, ALL SIDES.I JUST WANNA SEE HOW THINGS ARE ROUTED. MAYBE I'LL FIND A GLITCH

WE'LL GET IT ALL FIGGERED OUT!

THE MEDIC
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Saturday, December 21st, 2013 AT 6:48 PM
Tiny
SLAKSUMAN
  • MEMBER
  • 25 POSTS
No I have not timed it never done that before and we did make small carb adjustments my father in law did them he has done them several times to his projects and yes the choke butterfly is vertical when at temp
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Saturday, December 21st, 2013 AT 7:26 PM
Tiny
SLAKSUMAN
  • MEMBER
  • 25 POSTS
Ok here are the pictures you wanted and I also fired it up today and it just sat there and kept running intill I reved it to driving rpms or about 3 min and then it started to spit and sputter and the died I had to really pump the gas to fire it back up
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Sunday, December 22nd, 2013 AT 10:05 PM
Tiny
SLAKSUMAN
  • MEMBER
  • 25 POSTS
Ok heres the rest I did get a pic of where the butterfly is sticking it is the 4th pic
and on the last one is where I seen smoke coming from at where the intake and the exhaust manifolds meet and I still dont know what the petal looking thing is or what it is for because the spring for it is broken
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Sunday, December 22nd, 2013 AT 10:11 PM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,005 POSTS
I AIN'T FORGOT ABOUT YOU!

ARE YOUR EMISSIONS TESTED IN YOUR REGION. WHAT DO THEY CHECK ON THIS JEEP). IS YOURS EXEMPT BECAUSE OF AGE?

WE REALLY NEED A PLAIN JANE TIMING LIGHT AND A DWELL/ TACH METER TO TUNE THIS PUPPY AND ALSO TO TEST THE DISTRIBUTOR'S OPERATION

PAWN SHOPS ARE A GOOD INEXPENSIVE SOURCE FOR THESE "DINOSAURS"

HAVE YOU CHANGED THE COIL OR THE IGNITION MODULE (TELL ME---DON'T DO IT YET). GIMME THE COIL'S PART NUMBER, AND WHERE IT CAME FROM

THE MEDIC
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Monday, December 23rd, 2013 AT 9:53 PM

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