Re: [Amc-list] Weber 32/36 DGEV Issue

[Wrambler242@xxxxxxxxxxx]

All good ideas.
I would pull EVERY plug.
I chased a V6 XJ around in circles due to a bad plug once.
It would not show on a scope even!
I can't remember exactly what the conbination was, a bad plug and wire or another issue.
But it scoped clean.
Under load up a hill it would miss and buck. Would not do it in the shop.
Finally pulled all the plugs and found one that had the gap amost bridged with something.
I can't even remember what it was now! CRS syndrome again.
I do remember how mad I was after waisting a lot of time whem I finally found the issue!

Not saying that is it, just that I would do the simple stuff first!

--
Mark Price
Morgantown, WV
1969 AMC Rambler, 4.0L, EFI, T-5
2004 Grand Cherokee Laredo, 4.7L, Quadratrac II
" I realize that death is inevitable.
I just don't want to be around when it happens! "

 -------------- Original message ----------------------
From: Todd Tomason <jayscore@xxxxxxxxxxxxx>
> I'm going to consolidate my replies into one email.
> 
> Tom Jennings wrote:
> > See if you can isolate it -- is it RPM? Try 2nd @35mph. Hmm... I assume
> > this is a six, it's probably lugging hard at 35 in 3rd gear (depends on
> > axle and tires) so you could have the secondary open and if there's a
> > problem there... I can feel the secondary open on mine; if you can,
> > press up to that point only, see if it improves.
> 
> Not sure I'm following you here.  The car has a T5.  35mph in 2nd revs it up 
> pretty high.  I did try that hill in 2nd, but only got it up to about 30mph.  
> 35mph in 3rd is right in the middle of it's range.  I usually shift into 4th 
> at about 40mph.  I don't think the secondary is opening.  I'm only at about 
> half throttle.  
> 
> Wrambler242@xxxxxxxxxxx wrote:
> >   I'd start by checking plugs, cap, rotor, wires, etc; even if new.
> > It sounds like the spark is getting lost under load.
> >   I've chased that condition around before.
> 
> The plugs only have a couple thousand miles on them.  Champion RFN14LY.  I 
> pulled a couple and they look fine.  I found one iffy plug wire.  The cap and 
> rotor look worn but not horrible.  I went ahead and ordered new wires, cap, 
> and rotor.  I'll put those on tonight.  I tested the coil with an ohm meter 
> per my Chilton's manual, and it tested fine.  The wires connecting to the 
> coil seemed good and tight.  
> 
> d stohler wrote:
> > sounds to me like it could be a fuel starvation issue. i had that on casper
> > for a short while. how new is the filter? the screen in the glass bowl on
> > casper got plugged up with crud and would do the same thing when put under
> > a load. using more fuel, not able to provide/recieve that fuel at the carb.
> > my carb is a single bbl holley junker tho. just my thought. should still
> > check the coil primary wires (the + and - wires going to the coil. maybe
> > one is loose or cracked. or maybe the coil is going bad. feel it and see if
> > it is real hot. had a coil go bad before too. would work fine, get hot and
> > intermittenly spark.
> 
> I keep thinking it's a fuel issue too.  It only happens going up hill, but not 
> every time.  It's more likely to happen on a steeper hill, and is more likely 
> to happen as I get further up the hill.  The fuel filter is new as of last 
> Saturday.  The screen in the carb is a good idea.  I didn't think to check 
> that.  Maybe I dislodged some crud of some sort that's plugging it up and 
> restricting the flow.  
> 
> The problem seems to occur more when the vehicle is cold, so I don't think it 
> would be from the coil getting hot.   I'm checking the other stuff as 
> mentioned above.  
> 
> Ken Ames wrote:
> > Could be wide open throttle doesn't vapourize well or the fuel pump/flow
> > can't keep up with the demand or ,
> >
> > it could be the ignition. Full throttle puts a big load on the sparkers -
> > plug gap too big, coil can't handle it, etc.
> > Does it do this on the flat also if you use all the pedal for about the
> > same length of time as climbing the hill?
> 
> Opening up the throttle all the way does not seem to do anything.  Maybe bogs 
> down a bit.  Best acceleration seems to be at about two-thirds throttle.  I 
> drove around yesterday for about an hour trying to find a pattern.  It only 
> bucks on hills, but not every time.  I never got it to do it on the flat.  To 
> me it really acts like it's running out of fuel.  
> 
> The plan for tonight is to check the strainer on the carb as Dave suggested.  
> That's something I missed yesterday.  That would make sense if it's partially 
> plugged.  I'll also get the new wires, cap and rotor installed.   I guess 
> we'll see.  
> 
> Thanks everyone for your suggestions.  
> 
> Todd
> 
> 
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