> wrote in message
oups.com...
> I just test drove the van with the fuel gauge hooked up and the needle
> swept between 50psi and 70psi when I accelerated. The pressure never
> dropped below 50psi even while the van was running poorly.
>
> I also drained the gas and re-changed the fuel filter and it did not
> help.
>
> I will try and better explain how it is acting.
>
> The van always starts and runs fine.
> It drives fine for a short distance then starts to run very bad,
> sometimes backfires, stalls, and completely dies.
>
> It takes as much as 10 to 15 minutes of regular city driving to cause
> these symptoms or 2-3 minutes of driving under a load (when I hot rod
> it).
>
> If the van completely dies, I can turn it off for 10 seconds then right
> back on and I can usually baby it home (1-2 miles). If I leave it off
> for 15 minutes it usually runs quite a bit better.
>
> I have replaced:
> Leaky CPI (spider)
> Inlet outlet fuel lines (nut kit)
> Fuel Filter
> Fuel Pump and strainer
> Exhaust from O2 sensor back (waste of $$$... my dumb fault)
> Drained the gas
>
> Is it time to take it to a mechanic? I am out of ideas and do not know
> what else to check. Is there a certain test that a shop could perform
> that would tell me what is wrong such as a general diagnostic or run it
> on a computer?
>
> Does this still sound like a fuel delivery problem?
>
I am going out on a limb here and make a guess, actually a couple. One this
thing has a distributor. And as such it has a pick up coil, a magnet, and a
module. I would want a good scope put on the rig and watch the wave
patterns on the pick-up coil. while some of it sounds fuel related, the
back fire doesn't. I have ran into the same general symptoms you describe
in the past, except the time to restart was usually longer, but then by the
time I got them they were pretty much undrivable they had gotten so bad..
At 105,000 miles the bushings in the distributor are probably worn as well.
But I wouldn't change unless you can get a scope to verify which means
getting it to act up while its hooked up.
Whitelightning