[Shotimes] Intermittent Misfire on '94 w/ATX (long)
J.B. Hebert
jhebert@wrxtra.com
Tue, 16 Mar 2004 13:36:55 -0500
I'll double check the connector at the coil. If I was getting a burning
smell, I have to assume I'll see some sign of arcing or the like on
whatever component is causing my problem.
Thanks.
J.B.
At 09:28 AM 3/16/2004 -0600, you wrote:
>If the tach is reading lower than what the engine is actually running then
>this is definitely an ignition problem. I had the plug on the coil that
>would not seat fully due to the silicone gasket not fitting correctly. No
>power, missing on two cylinders and the tach reading low.
>
>Paul Nimz
>'97 TR
>'93 EG mtx
>
>
>----- Original Message -----
>From: "J.B. Hebert" <jhebert@wrxtra.com>
>To: "Carl Prochilo" <gr8sho@prochilo.myserver.org>
>Cc: <shotimes@autox.team.net>
>Sent: Tuesday, March 16, 2004 8:51 AM
>Subject: Re: [Shotimes] Intermittent Misfire on '94 w/ATX (long)
>
>
> > Ah, totally forgot to mention that. Yes, I did both tests when the
>problem
> > first started, but I have not done them since the most recent increase in
> > severity. When I ran the tests, everything came back normal. I'll try
> > them again tonight if I can get the car running long enough to warm up.
> >
> > Thanks,
> >
> > J.B. Hebert
> >
> > At 09:29 AM 3/16/2004 -0500, you wrote:
> > >Just curiious. In any of that long list of work did you do a KOEO
> > >or KOER test?
> > >--
> > >Cheers,
> > >Carl Prochilo
> > >1992 Ultra Red Crimson
> > >
> > >J.B. Hebert said:
> > > > Hello:
> > > >
> > > > I've been working on a problem with my '94 SHO 3.2 ATX. It's
> > > > driving me
> > > > nuts, so I'm hoping that someone here can point me in the right
> > > > direction. It started a few months ago with a surging/misfire at
> > > > light
> > > > throttle input. I thought I might have gotten some bad gas, so I
> > > > ran a few
> > > > containers of Techron through and the problem seemed to go away.
> > > > Then a
> > > > week or two later it came back again. It felt like one or two
> > > > cylinders
> > > > were not firing properly. Following standard troubleshooting for
> > > > these
> > > > cars, I first checked the spark plug wells. Sure enough, 2 or 3
> > > > were
> > > > nearly full of oil, so I replaced all the valve cover seals and
> > > > cleaned out
> > > > the spark plug wells thoroughly. After reassembling the car, the
> > > > problem
> > > > once again seemed to be resolved. However, after a few hours of
> > > > driving it
> > > > returned. At this point I had my mechanic run a few tests, and he
> > > > found
> > > > that one of the cylinders was running lean. I decided to have the
> > > > injectors rebuilt in case I had one intermittently sticking. At the
> > > > same
> > > > time I replaced the coil, in case I had one that was failing, as
> > > > well as
> > > > the air and fuel filters. I put the new injectors in, and once
> > > > again
> > > > everything was fine for a while. Then the problem returned. At
> > > > this
> > > > point, I thought it might be a spark issue. Even though the
> > > > previous owner
> > > > had recently had the spark plugs and wires replaced, they did not
> > > > use
> > > > quality wires, so I replaced the spark plugs with the appropriate
> > > > Motorcraft platinums and put a set of Taylor spiral core wires in.
> > > > After
> > > > doing this, the car ran great for about 15 minutes. I took it out
> > > > on the
> > > > highway and got it warmed up, then did a couple hard acceleration
> > > > runs. It
> > > > was running out smoothly and with good power. However, after the
> > > > second or
> > > > third run, I noticed that the car wouldn't rev over about 3800 RPM.
> > > > It was
> > > > like it was hitting a rev limiter or something when it tried to open
> > > > the
> > > > secondary runners. Suddenly, I completely lost power and the tach
> > > > dropped
> > > > to around 300RPM, even though the engine was still turning much
> > > > faster than
> > > > that. I managed to get to the next off ramp and at this point the
> > > > car was
> > > > running on MAYBE two cylinders. It would move, but the exhaust note
> > > > was
> > > > very bad and the transmission was having trouble shifting. The tach
> > > > was
> > > > way off; it would read around 400 RPM even after a shift. Around
> > > > this time
> > > > the cabin started to fill with nasty, burnt plastic smoke. I pulled
> > > > off to
> > > > the side of the road and shut down. I popped the hood and could not
> > > > find
> > > > the source of the smoke. It soon disapated so I started the car,
> > > > and it
> > > > ran much better. However, while limping home it got worse again and
> > > > the
> > > > smoke returned. I made it home and shut the motor off, coasting
> > > > down the
> > > > driveway. Once again I was unable to find the source of the smoke.
> > > > One
> > > > last thing to note: at no time during any of this has the check
> > > > engine
> > > > light come on.
> > > >
> > > > This car is driving me nuts, and making me long for my '89 MTX.
> > > > Does
> > > > anyone have any ideas what might be causing this?
> > > >
> > > > Thanks in advance.
> > > >
> > > > J.B. Hebert
> > > > _______________________________________________
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