[Shotimes] Engine troubles

[Shylo McKinsey]

HA!

See! And you wanted to get rid of the poor POS. Shame
on you!

I'm still trying to figure out where in the hell you
folks picked up a DIS for under $150. I paid over $200
for mine 2 years ago! :(

Shylo McKinsey

'91 White MTX

--- "Eric O. Angell" <eric+shotimes@cs.hmc.edu> wrote:
> On Sat, Mar 13, 2004 at 16:44:21 -0500,
> shojun@mtrs.org wrote:
> 
> > Your problem sounds almost exactly like the
> problem that my SHO had about
> > a year ago.  Fixing the problem cost me about $100
> (a new aftermarket DIS
> > module).
> > 
> > My symptoms:
> > -Sometimes it works fine, sometimes not.  It's a
> sudden jump between
> > working fine and not.
> > -The problem is not speed or RPM dependent.
> > -The problem initially seems temperature
> dependent, but later you realize
> > it's not.
> > -When the car's working fine, the tach reads
> properly.
> > -When the car's not working properly, the tach
> reads one-third low (ie,
> > instead of idling at 933 rpm, the tach says you're
> idling at about 600
> > rpm), even though you are absolutely certain that
> the engine is operating
> > at the same RPM as it normally would (by speed and
> gear combination, or
> > not noticing any change in RPM as the engine goes
> from normal operation to
> > crappy operation or vice versa).  To wit, stomp
> the throttle, and listen
> > for the butterflies opening when the tach reads
> 2700 rpm.
> > -When the car's not working properly, you get a
> soft foomp-foomp-foomp
> > sound from the exhaust.  The exhaust smells quite
> strong.  Power is
> > crappy-- my car felt like my mom's old 4-cyl
> Jetta.  Power delivery wasn't
> > as smooth as it should be, but it wasn't all that
> rough either.
> > -Once in a while when you crank the engine, the
> tach takes a few moments
> > to jump off of the 0 rpm after the engine has
> started.
> > -One time while I was sitting at a stoplight, my
> tach started climbing
> > without any reason.  It came back to 600 rpm a few
> moments later.
> > -When you try to pull the codes from the computer,
> sometimes it doesn't
> > give you any errors, sometimes it tells you
> there's a problem with the
> > coil pack.  Also, while doing the cylinder balance
> test, it tells you that
> > two cylinders have problems.
> 
> Yup, those symptoms pretty much exactly describe my
> problem.  As far as
> some of the other emails I received go, no, the DIS
> isn't touching the
> bracket, so I don't have any bushing problems. 
> Also, the explanation
> that the tach is fed by spark plug firings makes a
> lot of sense - I'd
> figured it was a crankshaft sensor, and that also
> explains the crappy
> power if it's only running on 4 cyls instead of 6.
> 
> > parts place where I picked up an aftermarket dis
> module.  Swapped it in,
> > and the problem never came back.
> 
> I picked up an aftermarket (Niehoff) DIS module for
> $120 when I was in
> Denver, and that seems to have completely fixed it. 
> That's fantastic!
> Needless to say, the drive back from Denver to LA
> was muuuuch nicer than
> the drive up there.
> 
> Thanks a lot to everyone who provided suggestions!
> 
> -E
> 
> 
> -- 
> Eric O. Angell, eoa@cs.hmc.edu
> Harvey Mudd College c/o 2004
> Computer Scientist, Closet Engineer
> 
> "But why is the _rum_ gone?"
> --Capt. Jack Sparrow
> _______________________________________________
> Shotimes mailing list
> Shotimes@autox.team.net
> http://www.team.net/mailman/listinfo/shotimes


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