Re: AMC_Eagle stalling situation

[Wayne E LaMothe <superglider@xxxxxxxx>]

Do the Nutter bypass and see if the problem goes away.  Mine did.  You
can always put the computer back in line easy enough.

Wayne

superglider@xxxxxxxx, Lake George, NY
http://209.105.133.60/~superglider/index.htm
 2001 FLHTPI,88 Jeep J10, 85 Wagoneer
66 Ambo 990 wagon, 69 Ambo DPL


On Thu, 25 Nov 2004 11:20:04 -0800 "Jim Blair" <carnuck@xxxxxxxxxxx>
writes:
> I'm forwarding my reply to the list. Maybe someone can think of 
> something 
> else, or possibly make use of my posted ideas to cure their own ill 
> running 
> troubles.
> 
> 
> A: It only stalls when you come to a stop, right? I was thinking 
> about your
> stalling trouble and the best way to test it is to use a vacuum 
> gauge to see
> if you have a leak or not. Too much gas dumping at idle will cause a 
> shut
> off (float too high) Any shop that could take that long to remove 
> the
> manifolds and NOT have them planed or at least checked for flat 
> shouldn't be
> in business in MNSHO! You need to find a Jeep repair shop.
>    Is the cat clogged? That would cause a backup of pressure that 
> the motor
> can't overcome. It can be tested by unscrewing the O2 sensor and 
> going for a
> noisy drive. No stall = clogged cat. (you could also put a gauge in 
> the hole
> to see how much backpressure there is) If the cat falls apart, the 
> pieces go
> into the muffler and cork it like a bottle. (happened to me several 
> times on
> various Jeeps and Eagles) High flow cat will take the place of the 
> OEM one,
> and the AIR junk can be trashed in every state but CA. (They still 
> require
> it, even though it comes with a CARB certification tag for the 
> removal of
> the junk tubes)
>    Fuel pump, or more likely crap in the fuel line can cause this 
> trouble.
> The fuel sock in the gas tank could be collapsed from MTBE fuel 
> additive (it
> turns plastic to mush and rubber hoses become piccolos!) I throw 
> away the
> stock in tank screen and just put a piece of hose on the end (to 
> make it
> reach all the way to the bottom) and cut the fuel hose just before 
> the fuel
> pump and put in a see-thru filter (put it where it won't get broken 
> and it's
> easily acccessible to see if it's dirty) A fuel pressure/vacuum 
> gauge on the
> line before the pump will tell you if there is a clog happening or 
> not
> (there shouldn't be any vacuum reading unless there is a clog)
>    The other thing that causes a LOT of stalls on AMC 6 cyls is the 
> cam
> walking ahead. Ordinarily they don't slide ahead, but if you get on 
> the
> brakes, the spinning inertia of the cam can allow it to slide 
> forward, which
> throws engine timing retarded and changes the cam timing somewhat. 
> The cure
> for this is to find a 4.0L for parts and get the timing cover and 
> cam button
> off it. The problem was rampant enough that AMC HAD to put a fix in 
> the
> stock motors. (Last of the 4.2Ls, post '86 to 08/'90 in Jeeps got 
> them too)
> That will cause a stall too. (If you had the timing computer that 
> you could
> plug in and map what's doing what with RPM/inertia forces, you could 
> tell
> for sure)
>    It's the idle pickup tubes, not the Venturiis that get clogged. I 
> did a
> http://www.google.com search for BBD fix and came up with Terry 
> Howe's fix
> http://www.jeeptech.com/engine/carter.html
>    If your motor is overheating, then I would look more seriously 
> into the
> head gasket problem. Too bad the Holley Projection kit for AMC 6 
> cyls costs
> so much. What would be nice is a wiring harness (universal) to 
> attach the
> Renix BBD EFI to AMC 6 cyls with junkyard parts. The HO conversion 
> kit is
> available from Jeep still (although they stopped making it, there 
> are still
> a few available) but the intake won't fit against the brake booster 
> in the
> Eagle. (The Renix one will)
> 
> 
> 
> Todd wrote:
> So, I got my car back from my new mechanic. It was 5.5 hours for an
> intake manifold gasket replacement. The worst part is that it did
> not fix the stalling problem. Know he tells me that the head, 
> intake
> manifold, and/or exhaust manifold are warped and need to be 
> replaced
> or machined at a shop. I decided against leaving my car there. I
> also needed the air inake check valve replaced. I told him they do
> not make the original part but instead a universal type. I even 
> told
> hoe to replace it and install the new one based on a reply from 
> this
> forum. I took a look when I got home, he rerouted it some where, I
> don't know where it is.
> 
> Some questions:
> Could the fuel pump be the problem?
> 
> On another AMC forum, someone commented on the venturi nozzels in
> the carb, has this been sucessful to others? If so, any advice for
> replacement.
> 
> I tried a mechanic since I felt I did not have the time to do it
> myself, from know on I will find the time.
> 
> Todd M.
> 
> 
> 
> 
> 
>  
> 
> 
> 
> 

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