If it has backfired a few times, check the following items:
1) Fuel Pressure Regulator Vacuum Line, be sure it isn't off or leaking.
2) Fiber spacer blocks under intakes at the heads for leaks, cracks.
3) Flapper in the AFM might be stuck or fouled the internal track devise.
I have found all three problems at one time or another on my van.

Stan Wilder

On Wed, 19 Mar 2003 15:19:47 -0800 mark drillock <drillock@EARTHLINK.NET>
writes:
> It sounds like the spark plug wires may be connected out of order.
> You
> do know that they are not in numerical order on the cap? Many people
> get
> the ones on the right side reversed.
>
> Mark
>
> Anthony Hecht wrote:
> >
> > It's been a long couple of days..
> >
> > So, I have oil pressure, I have a new coil. The wires are
> sparking. The
> > engine isn't starting.
> >
> > I've taken the plugs out, disconnected hoses from the intake air
> distributor
> > to let it dry out, disabled the cold start valve, everything I
> could think
> > of, it just won't fire.
> >
> > Before the CSV was disconnected, it was sort of sputtering, but
> more like
> > backfiring. To the point that it blew one of the intake pipe boots
> off the
> > pipe. White smoke from the exhaust, and from the intake
> distributor when it
> > backfires, but nothing more.
> >
> > If any of you very knowledgeable people can suggest some more
> things to try,
> > I'm all ears (eyes). I'm starting to run out of ideas.
> >
>
>

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