[DML] Engine bogdown.
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[DML] Engine bogdown.



Ok guys, here we go with my new problem.

Start the car - cranks and fires right away.  Idles
beautifully, lambda system unhooked and air/fuel screw
adjusted for "perfect" steady idle.  Lightly push the
accelerator, car runs ok.  Push the pedal to 1200
rpms+ (I would guess about 1/4 push down on the
pedal), and the engine stutters heavily, cylinders
popping on and off completely randomly, extreme engine
bogdown.  If the car maintains a steady speed and the
pedal is pressed firmly while keeping a slowly
incrasing speed, the engine is strong and runs great. 
If the pedal is pushed very hard and firm from a dead
stop, the car almost loses power completely; one can
feel the car almost give up it loses so much power.

This is with the engine cold, warm, or hot - anytime. 
My symptoms sound EXTREMELY similar if not identical
to Rich Acuti's article on "General Tuneup Issues" at
http://dmcnews.com/Techsection/tuneup.html .

I have placed the Bosch K-Jetronic Fuel Pressure
Gauges on the car, and all the values are dead on and
perfect.  The car holds rest pressure, steady fuel
pressure; every gauge measurement is perfect.  I have
replaced all 11 vacuum hoses with silicone vacuum
hoses.  The thermal vacuum switch is working properly;
I'm getting vacuum from the appropriate hoses.  I have
the "old blue" coil bought in April 05.  All the
connections underneath the coil cover are firm and
intact.  The lambda system - if I choose to hook it up
- functions correctly in all aspects.  With the lambda
system hooked or unhooked the car experiences this
"engine bogdown".  I cannot find one vacuum leak
anywhere in the engine compartment; I have THOROUGHLY
soaked the engine with fluids and not one idle
fluctuation.  There was one vacuum leak on the coal
canister; the closed rubber hose on the little valve
labeled "carb" was totally rotted, but we put a brand
new rubber hose on it with a clamp to secure it and
still the engine bogs.  

I am completely baffled by this.  What would cause the
engine to accelerate so wildly and bog the engine down
so hard?  Anyone, please, give me anything you can
think of.  This car is my driver, so I have to deal
with this every single day I drive it.  

My guess is it's ignition related.  On that note, my
ignition timing is in the 13-15 degree mark - just
FYI.  Could this just be a case of bad spark
plugs/spark plug wires/cap and rotor/dirty grounds? 
I'm ready to do all that stuff; I may need a little
help locating the grounds Rich mentioned in the tech
article, but dangnabbit to fix this problem I'll learn
real fast.

One of my first suspects is the spark plug wires.  How
do you go about testing them with a multimeter?  I am
a little familiar with how to use one; I just need to
know what settings to utilize on the multimeter and
how exactly to test the spark plug wire?

Sorry for the long post guys; I just want to get this
resolved.

Jeremiah

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