Thanks, for the info. I have checked and replaced the EGR valve and
replaced the O2 sensor. The old EGR valve checked out OK, but at >100K
miles, I figured both needed replaced. I guess there is no guarantee that
the new O2 sensor is not bad, but I don't know of any way to check it. I
have to pass an emission test every two years, so I just replaced them prior
to the inspections. The numbers on the inspection looked good. I am trying
to find out how to check the fuel sync with the camshaft postition sensor. I
had a spare set of injectors lying around, I even tried that. Also have new
plugs, wires, distributor cap, rotor. I have three PCMs. Two stock and one
Performance PCM. All three do the same thing.
""Biff Byrum"" <bbyrum9@foothill.net> wrote in message
news:018501c444e0$5e7b04a0$de3c5142@p8g0l2...
>
> I would suggest anything but the belly pan gasket. It's nothing more than
> unburned fuel. Just look at anything involved in firing the engine, except
> timing. That's not settable beginning that year. Best guess would be O2S.
> Also EGR. Do you know how to test the EGR? With a hand vaccum pump it's
> simple. But the O2S sounds like the likely problem. Biff
> ----- Original Message -----
> From: "BlackDak93" <stephen.barnett@worldnet.att.net>
> To: <dakota-truck-moderator@bent.twistedbits.net>
> Sent: Friday, May 28, 2004 8:35 AM
> Subject: DML: Engine backfire on deceleration
>
>
> >
> > My 93 dakota 5.2L backfires and pops and rumbles when ever I let off the
> gas
> > or just as I apply throttle after coasting. I have a couple of shops
look
> at
> > it, but no success. I also am getting a fair amount of "pinging." even
on
> > premium gas. I suspect the infamous belly pan gasket is leaking. My
> question
> > is, could a leaking belly pan gasket cause this backfire? Does anyone
have
> > any suggestions for other possible causes/cures for this backfire?
> >
> >
> > ______________________________________________________
> > This email was pre-scanned by Spam Guardian
> > A Service Provided by http://www.foothill.net
> >
>
This archive was generated by hypermail 2b29 : Tue Jun 01 2004 - 10:59:13 EDT