Re: Coasting and pulsating

["jtrealty@xxxx " <jtrealty@xxxx>]

I can think of two reasons for the pulsating, a pulsating fuel 
pressure (which you can check with a fuel pressure gauge) or a
problem 
in the secondary ignition circuit such as a bad ignition wire, fouled 
spark plug, arcing dist cap. It could also be an unbalance in the
fuel 
distibuter. Thinking more about it I would probably suspect a fuel 
injector that is out of spec. Every time it's turn comes around it 
puts out the wrong amount of fuel. Knowing how touchy the fuel system 
is to dirt that would probably be my first choice. A quick test of
the 
ignition system, run the car at night in a dark spot with the engine 
cover open, put your hands in your pockets and while someone can rev 
the engine observe the ignition system for blue glows or sparks.
You cannot check the spark plug boots this way because of the deep 
wells. If the wires are origional just replace them. The injectors
can 
be tested and posssibly cleaned by someone with access to an injector 
tester, you don't always have to replace them.

David Teitelbaum
vin 10757




--- In dmcnews@xxxxxxxxxxx, jdsjlv@xxxx wrote:
> With all of the posts regarding hesitation, ect. I figured I would 
comment on 
> how my D pulsates while coasting. Yesterday I was cruising down a 
flat road 
> in my home town. I had my foot resting on the accelerator and I was 
in 3rd 
> gear. My RPM's were right on the 2100 mark and my speedo read 35 
MPH. What I 
> felt was a slight pulsation, almost as if the car was trying to
keep 
up with 
> the pace given the consistent placement of the accelerator. If I 
pressed down 
> more on the pedal or released it, nothing out of the ordinary would 
happen, 
> either it would accelerate strong or decelerate accordingly. My 
question is 
> this: given that the D is a CFI engine (right?) would this explain 
the 
> pulsating at a consistent speed? I don't feel it unless I really 
concentrate 
> on it, or If I go slow enough. Last year I had my micro switch (the 
one near 
> the accelerator spool) replaced and my car is properly serviced.
Has 
anyone 
> experienced this before? To better explain the feeling behind the 
wheel, 
> imagine sitting in a chair and ever so gently moving forward and 
backward - 
> that's what it feels like! Any ideas???
> Thanks,
> Joshua D. Schwartz
> 001292
> Trumbull, CT