stumbling 4kcsq

[James D. Hanson]

Oh, it just occurred to me that this may be related.. (duh)
it failed emissions at idle, with high CO levels.
Running too rich?

Thanks,
Jim

On Mon, 4 Mar 2002, Brady Moffatt wrote:

> Jim,
>
> Mine did the same thing, and what "cured" it was richening up the idle
> mixture a bit. What  _caused_ the problem, though, was some vacuum leaks
> (manifold gaskets, injector seals). Once those were fixed, the mixture had
> to be leaned back out a bit. HTH.
>
> Cheers,
> Brady Moffatt
> Montreal, Quebec, Canada
> 86 4ksq, 282,000km
> 72 Datsun 240Z, 180,000 miles
>
> ----- Original Message -----
> From: "James D. Hanson" <jhanson at westmont.edu>
>
>
> > My 87 4kcsq seems to have a problem... when accelerating away from a stop,
> > the engine stumbles between about 1000 and 2000 rpm.  Accelerator position
> > seems to have no effect.  If I rev the engine first a few times, then
> > accelerate, there's no problem.  Similarly, if I don't give it a chance to
> > settle into idle, its fine.  This happens warm and cold, though its most
> > noticeable when the engine is warm.
> > Any ideas what is causing this?
> >
> > Thanks,
> > Jim
> >
>