Well at one time I thought I was a mechanic. Of course that was 40 years
ago before today's modern electronic warfare on the old mechanics.
Here is the problem. My 1994 1500 Blazer with the 350 engine (throttle
body injection) is bucking and stuttering in low RPMs.It is like the engine
keeps cutting out and catching. Once the RPMs get to cruising speed, the
engine runs fine. This happens at each shift of the transmission before the
RPMs come up.At first I thought it was a fuel problem and might still be. I
changed the in line fuel filter under the driver's side. I have changed the
dist. cap. When I changed the dist cap, I noticed that the coil(?) end of
the coil wire had a large quantity of white powder from oxidation. I cleaned
the coil connection and wire. I still have the problem.
So, do any of you have a suggestion on how to tame this bucking Bronco?
You may have a bad pickup coil. Check with a timinmg light, look for miss-fires.
I had a bad pickup coil 2 yrs ago, it would buck off the line and on light
grades in 5th gear/light throttle.
The pickup coil had patches of green corrsion on the windings, indicating the
enamel was gone.
Was a Dog to take apart, wound up with a new Dist. Oh and watch out for the
ignition module, their a charm.
I am starting to suspect that it is indeed the "pickup coil". I am under
the impression the the coil has replaced the vacuum advance system. Is that
true? Because this acts like a bad vacuum advance whuch is not on this
vehicle ( I think??)
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