442 is not affecting the misfire, focus on that first, low fuel pressure,
dirty injectors, the usual list of suspects.
"SBlackfoot" <trypticon@[EMAIL PROTECTED]
> wrote in message
news:g6b0qk$dc6$1@[EMAIL PROTECTED]
> '98 Olds LSS, 3800 N/A. Again.
>
> Currently my CES light is on, throwing a fairly constant P0300
> random/multiple misfure and an occasional P0442 small leak in evap
system.
> On the way home today at roughly the same time a P0442 popped up the
> engine stumbled badly for a second while cruising at a constant speed on
> the highway and the 'check oil' light came on for a few seconds. The oil
> level is right at the top and I've already done an ignition tune-up
> (wires, plugs, even coils and ignition module). Gas cap is recent and
> tight, and there are no obviously broken vent or vaccuum lines.
According
> to my Carchip logger the P0300 is popping up every trip and the P0442 is
> only once in a blue moon.
>
> Obvious questions: What would cause the P0442 at cruising speed, AND
cause
> a stumble AND 'check oil' light? And what are the odds that it is
related
> to my P0300 misfire? I suppose my next steps are to look towards the EGR
> and/or injectors for the misfire but that's just a baffled shot in the
> dark.
>
> All of this while my ZJ is stuck in the driveway waiting for a water
pump
> and rad. Great, just great.
>
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