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Fixed: V6 Cutting out at cruising speeds?

Discussion in 'Early CJ5 and CJ6 Tech' started by sparky, May 14, 2006.

Page 15 of 50
  1. Jun 4, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    Re: V6 Cutting out at cruising speeds?

    Mine's fine inbetween the cylinders, that coolant passage is the only deterioration I can find.

    Leaves the head itself? Have it magnafluxed?
     
    sparky, Jun 4, 2006
    #281
  2. Jun 4, 2006
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
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    Re: V6 Cutting out at cruising speeds?


    I'd say that any head gaskets (comp or metal) that go over 150K mean that you got your moneys worth. Being metal, they can corrode if engine sits for long inactive periods, weak or no anit-freeze, or just the natural process takes over, wear and tear.
    Very rarely can you tear an engine down and state that it was the head gaskets fault; you are seeing the result of some other problem or condition, usually overheating at some point in its life.
     
    jpflat2a, Jun 4, 2006
    #282
  3. Jun 4, 2006
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    Re: V6 Cutting out at cruising speeds?

    I think it would be a mistake not to.
     
    Glenn, Jun 4, 2006
    #283
  4. Jun 4, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    Re: V6 Cutting out at cruising speeds?

    That's what I was thinking. :(

    Dang. Now I'm rethinking not thinking I'd rebuild the whole thing. R)
     
    sparky, Jun 4, 2006
    #284
  5. Jun 4, 2006
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    Re: V6 Cutting out at cruising speeds?

    It's a dilemma I know. How many miles on it? Assuming they're correct and it's the original unmolested engine?
     
    Glenn, Jun 4, 2006
    #285
  6. Jun 4, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    Re: V6 Cutting out at cruising speeds?

    <shrug> it's anybodies' best guess. Oakes didn't know when he got it in the late '90s. Just ran good till now, that's all I know.
     
    sparky, Jun 4, 2006
    #286
  7. Jun 4, 2006
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
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    Re: V6 Cutting out at cruising speeds?

    your compression readings were fine
    if it wasn't smoking/using oil, just redo the top end
    very common pratice, valve job without re-doing the lower end
     
    jpflat2a, Jun 4, 2006
    #287
  8. Jun 4, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    Re: V6 Cutting out at cruising speeds?

    That's what I initially thought too Jim. Thanks for reaffirming that.
     
    sparky, Jun 4, 2006
    #288
  9. Jun 9, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    Re: V6 Cutting out at cruising speeds?

    Sooo, now I don't know whether I'm :) , :( , or just plain :?

    I picked up the heads just now. Found the source of the smoke. Valve guides were extremely worn. So I guess it wasn't antifreeze. Still don't know why the exhaust sucks your hand back up to it on the passenger side though. :? Well, it did, don't know now...

    Nothing else wrong at all he said, "They looked excellent except for the valve guides."

    Great. Well, I guess there's no better time than the present to fix that issue and figure out that's not the problem.
     
    sparky, Jun 9, 2006
    #289
  10. Jun 9, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    Re: V6 Cutting out at cruising speeds?

    Stuck lifter?

    Guess I had hardened valve seats already. 8)
     
    sparky, Jun 9, 2006
    #290
  11. Jun 12, 2006
    Super Dave CJ6

    Super Dave CJ6 Super Dave

    Victorville Ca.
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    Re: V6 Cutting out at cruising speeds?

    Sparky,

    Have you got it back together yet? I've been away for a while and just now read this thread in its entirety. I have this excact problem with mine. I havent driven it for about 2 months. I've rebuilt the carb, new plugs, wires, cap , rotor. still have the prob. I was planning a rebuild of the motor. Waiting to see what happens with yours.
     
    Super Dave CJ6, Jun 12, 2006
    #291
  12. Jun 12, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    Re: V6 Cutting out at cruising speeds?

    If it were back together you'd have a report by now. ;)
     
    sparky, Jun 12, 2006
    #292
  13. Jul 28, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    Re: V6 Cutting out at cruising speeds?

    Ok, any new ideas on this. :cry:

    I'm about ready to have a mental breakdown. I've now had two carbs, two fuel pumps, two distributors, and two camshafts, the heads are redone.

    This AM I gassed it up, and headed out on the hiway to drop it off to get new tires. I was doing 65-70 pretty easily. After about 2 miles it coughed. Then again, then a double cough, after 3.5 - 4 miles it was back to doing this. :mad:

    I'm so upset, I don't know what to do. :cry:

    I dropped it off for new tires. I know I'll get home in it even if it's only at 50 mph, but I really thought I had this fixed.

    Only things that haven't changed, are spark plugs (I put them in and this started????) and the timing chain which I replaced last fall. I have another that came with the camshaft kit...
     
    sparky, Jul 28, 2006
    #293
  14. Jul 28, 2006
    BlueFlu

    BlueFlu past owner of some ecj5's

    Hermitage, TN
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    Re: V6 Cutting out at cruising speeds?

    Sparky on the off chance, what about the fuel filter?
    What about the rubber sections of fuel line?
     
    BlueFlu, Jul 28, 2006
    #294
  15. Jul 28, 2006
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
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    Re: V6 Cutting out at cruising speeds?

    {staring at screen in disbelief}
    not to sound like a dweeb.......
    but...
    detailed specifics again please after this last drive
    cough...backfire thru carb ?
     
    jpflat2a, Jul 28, 2006
    #295
  16. Jul 28, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    Re: V6 Cutting out at cruising speeds?

    Fuel filter has been gone through too.

    Rubber sections of fuel line are all new since this started.
     
    sparky, Jul 28, 2006
    #296
  17. Jul 28, 2006
    BlueFlu

    BlueFlu past owner of some ecj5's

    Hermitage, TN
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    Re: V6 Cutting out at cruising speeds?

    Banging head with hand.
    The only thing I can think of is vapor lock. :?
     
    BlueFlu, Jul 28, 2006
    #297
  18. Jul 28, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    Re: V6 Cutting out at cruising speeds?

    Vapor lock, only in 3rd? I popped it out of gear and revved it up when it started doing it, then when it did it again I dropped it in 2nd gear. Only 75* here this AM. :?
     
    sparky, Jul 28, 2006
    #298
  19. Jul 28, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    Re: V6 Cutting out at cruising speeds?

    Exact same symptoms as before. Not as pronounced, I didn't push it real hard not wanting to tear it up.

    Coughing, hard to describe. Just looses power and coughs and bucks. Can't tell but seems like it's backfiring through the carb. Not through the exhaust.

    Just makes me wonder about the timing chain. Seems like the cam timing is getting off the way it acts. Dunno, maybe I'm off on that. I hope it's just spark plugs or vapor lock, something quick and easy to fix.
     
    sparky, Jul 28, 2006
    #299
  20. Jul 28, 2006
    termin8ed

    termin8ed I didn't do it Staff Member

    Mason, MI
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    Re: V6 Cutting out at cruising speeds?

    Dang:shock:
    I think I'd be trying new plugs. even if they are fairly new.

    I'd say pull the timing cover and double check the timing gears, but you probably did that when you put the cam back in;)
     
    termin8ed, Jul 28, 2006
    #300
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