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Almost a CJ day; or, one step back...

Discussion in 'Early CJ5 and CJ6 Tech' started by lynn, Jul 11, 2006.

  1. Jul 11, 2006
    lynn

    lynn Time machine / Early CJ5 HR Rep Staff Member

    Huntingdon PA
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    Well the CJ seemed to be running OK on Saturday, but I was suspicious about what felt like hesitation... I thought I had that worked out.

    I got the CJ out this morning, 6:15. It fired up, wasn't missing... GREAT!
    Rolled her down to the bottom of the driveway, all seemed good, let her warm up a bit. I'm gazing around with the top off, just kind of enjoying the early dawn light...

    I go to pull out, and the engine dies. It happened just as I started to feed gas. It didn't stumble, just died. :evil:
    It started right back up.

    It did it aqgain as I began to feed gas. If I feather up the rpms, then give it gas, it seems OK, but if I go to feed gas as I'm pulling out from an idle it wants to die.
    It stalled 2 more times, and was hard to restart the last time... so I backed it into the garage :(

    It feels electrical, because the shutoff is so clean. no stumble, just like turning off the key. Could be the pertronix module (8+ yrs old now) starting to become intermittent?
    But it seems to be coincident with feeding gas, so I started thinking accelerator pump... but that's usually more of a stumble or cough then continue running....
    I'm thinking maybe I got some dirt into the carb when I washed the engine last month... you know that depression in the air cleaner lid where the stud goes through that can hold water and drain down the stud... but what part of the carb would cause it to shut down so suddenly, but start right back up?

    I was REALLY looking forward to a pleasant CJ drive this morning :cry:
     
  2. Jul 11, 2006
    H8PAVMNT

    H8PAVMNT Rub his head for luck

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    The darkside calleth you. . . . R)

    :coffee: morning Lynn. I wish I could help.
     
  3. Jul 11, 2006
    lynn

    lynn Time machine / Early CJ5 HR Rep Staff Member

    Huntingdon PA
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    :coffee: Mornin Brad !
    The dark side called strongly this morning...
    others may have felt the disturbance in the Dauntless Force... :shock:

    I'm thinking about throwing a new Pertronix module at it. If that doesn't cure it, I'll at least have a spare.
    Maybe run some Seafoam through it, or replace the accelerator pump...
     
  4. Jul 11, 2006
    Sledgehammer

    Sledgehammer Sure, I'll try it

    Ellery, Il
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    That's why I'm not going to start mine until after work (and a new rotor and points). Keep that dark stuff away from me.
     
  5. Jul 11, 2006
    H8PAVMNT

    H8PAVMNT Rub his head for luck

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    Lynn what if you swapped out that pertx for points to see if that is the problem?
     
  6. Jul 11, 2006
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    Distributor cap wet inside? Your description does sound electrical, but gas/carb problems like to act that way too sometimes. ;)
     
  7. Jul 11, 2006
    lynn

    lynn Time machine / Early CJ5 HR Rep Staff Member

    Huntingdon PA
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    Cap interior is dry, even sprayed with Amp-guard (similar to WD-40, for electric motors) a couple weeks ago. Haven't left the garage since then except for a 2-mile thrashing I gave it on Saturday (dry weather). It's running smoothly at all rpms, just seems to lose fire when I feed gas from an idle or just off idle (and not every time).
    Glass fuel filter just before the carb shows all clear.


    Points... long gone... I'd rather buy a new module than new points, I never had much success setting points (big gap in my edjumacation ;) )
     
  8. Jul 11, 2006
    BlueFlu

    BlueFlu past owner of some ecj5's

    Hermitage, TN
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    Lynn for my past VW air cooled days, Pertronix are either good or bad, no middle ground. Not saying it cant happen just never seen it.
    Maybe a loose wire?
    Sure hate to spend a $100 and still have the same issues.
    What about the choke sticking closed maybe?
     
  9. Jul 13, 2006
    lynn

    lynn Time machine / Early CJ5 HR Rep Staff Member

    Huntingdon PA
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    Jerry, yer probably right on the Ptronix thing.
    As for the choke: manual.
    Not a wire, definitely related to gas feed.
    Now I'm thinking maybe some dirt in the carb. Next week when I have time I'm gonna try some spray-in carb cleaner, or maybe seafoam If that doesn't get it I'll throw a new accelerator pump at it and see what happens... I only have next Thurs and Fri nite to get it running right to drive to the PA Jeeps show ... :D
    [​IMG]


    Jerry, looks like we'll both be in OBX this weekend... I'm headed to Nags Head/Manteo for my youngest son's wedding :)
     
  10. Jul 13, 2006
    vanguard

    vanguard

    Did you check the coil wires?
     
  11. Jul 13, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    Got that cam eating bug going around? R)
     
  12. Jul 13, 2006
    lynn

    lynn Time machine / Early CJ5 HR Rep Staff Member

    Huntingdon PA
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    Joel, I'll check them before I try anything else.
    Sparky, with 80K + and a history of sticky lifters, I'm sure the cam and lifter profiles aren't like new... I'm sure I'm on borrowed time!
    I bet that cam bug is munching every time I start it... ;)
     
  13. Jul 13, 2006
    jeephabit3

    jeephabit3 New Member

    Breckenridge, CO
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    I had a similar type problem with my Early Bronco and it turned out to be some bits of plastic/rubber that were stuck in the float. It would pretty much idle forever but less than 1/2 way around the block it would just stuter and die.
     
  14. Jul 13, 2006
    lynn

    lynn Time machine / Early CJ5 HR Rep Staff Member

    Huntingdon PA
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    Good input Habit, I'll check that :beer:
     
  15. Jul 31, 2006
    lynn

    lynn Time machine / Early CJ5 HR Rep Staff Member

    Huntingdon PA
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    Here's the latest on this. I installed a new accelerator pump, it didn't cure it. Then I installed a new coil, the day of the Jeep show. Must have been a little hotter, it ran good for 1/4 mile, then cut out again. I got it back home, and drove the truck to the Jeep show :( :cry: :mad:
    Didn't mess with it again until Saturday. I pulled all of the plugs, one was somewhat fouled and burnt, so I replaced it, cleaned and gapped the others at .040.
    Started it... no change, maybe worse, noticeable immediately. I pulled off the dist cap, checked the climb on the shaft, hardly any...
    Then I noticed a good bit of black carbon on the contact edge of the rotor

    :?

    I turned the cap over, saw alot of carbon on each contact... Ah- HA!!

    I hadn't looked at these before because about a month ago I sprayed some Amp-guard in there to dry out moisture :shock: and all was clean then, maybe only 1K miles on this cap and rotor...

    I tried wiping off the carbon, no good. I got out my dremmel with a fine stone and cleaned each contact in the cap and on the rotor...
    Viola!! It started smoothly, ran smoothly, the miss/cut out was gone!
    I ran it pretty hard about 4-5 miles to the gas station, it ran perfectly!
    Dropped a 10-spot in the tank, drove it back... on the way back it cut out/missed a couple times...

    So, apparently this stuff I used called Amp Guard isn't quite like WD-40. It must have caused the carbon build up, arcing inside the dist cap. Although I ground the contacts, there must be some residual stuff inside the cap to cause the miss on the way home. I ordered a new cap and rotor yesterday, I'll pick it up today after work (only working half days through Wednesday, we're keeping our 2-year old grandson).
    Maybe get time to install it tonight. Hopefully that will be the cure; too bad I didn't get to take it to the show over something simple like this. :rofl:
    I'll then keep the old cap and rotor, give them a thorough cleaning inside to remove that residue, keep them for trail spares.
    I know little Grant wants to go for a ride in "Pappy's Jeep" !!!!!!!! :D
    I need to get it running so he can go for a ride! Just around the neighborhood, and of course in his car seat... He had a blast yesterday sitting in the drivers seat in the garage, turning the steering wheel and beeping the "beep-beep" horn... R)

    I'll post later this week with results from the new cap/rotor.
     
  16. Jul 31, 2006
    speedbuggy

    speedbuggy Looking for a Jeep now

    Living the Good...
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    Hope it works for you Lynn. Keep us posted!
     
  17. Jul 31, 2006
    panzer

    panzer Super Mod Staff Member

    Columbus, OH
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    Good news Lynn!!!
     
  18. Jul 31, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    Do you make house calls to KS for engines that are missing out?
     
  19. Jul 31, 2006
    lynn

    lynn Time machine / Early CJ5 HR Rep Staff Member

    Huntingdon PA
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    I thought about yours alot Sparky while working on mine.
    It's got to be something simple...
    I like the vacuum line of thinking. Easy & cheap to replace all vacuum lines. Any chance of rubber fuel hose being dry-rotted/cracked, leaking or sucking air?

    Another thought, is the vac advance curve dialed in correctly? Vacuum adv. diaphram intact on both distributors?

    KS will probably be cooler than here the next couple days... :D
     
  20. Jul 31, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    Doubt that...
     
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