use the diagnostic machine to do a rundown on the computer and a thorough
checkout of all sensors. if those checkout OK then have them do a cylinder
leakdown(wet and dry) test to see if there's not a sticking valve. If OK
then there is the possibility of a bent push rod or faulty tappet(since
there is rattly sound) just a few ideas to go with anyway.
starwolf@bewellnet.com
'95 SLT(only thing missing is U) Xcab
----------
> From: Scott Williams <scottw@zoomnet.net>
> To: dakota-truck@buffnet.net
> Subject: DML: Re: Backfiring
> Date: Friday, October 10, 1997 11:11 AM
>
> It is definitely backfiring through the throttle body. The inside of the
> air filter is scorched.
>
> I have also noted that when the engine is hot, I can hear a lifter
pecking.
> When I mentioned this to the dealer, he said it is inherent in the 3.9L
V6
> to have some lifter noise. (I don't buy that excuse.)
>
> Scott
>
> ----------
> > From: Keith R Wanderi <keith.wanderi@fsg.deluxe.com>
> > To: 'dakota-truck@buffnet.net'
> > Subject: DML: RE: Backfiring
> > Date: Friday, October 10, 1997 6:48 AM
> >
> > Backfiring can be caused by excess fuel/air mixture in the exhaust or
by
> > the plug firing with an open valve. Is it firing through the exhaust
or
> > throttle body? Someplace to start looking..
> >
> > Keith R Wanderi
> > keith.wanderi@fsg.deluxe.com
> > 1997 SLT CC 4x4 V6 Auto
> > K&N FIPK, Gibson Cat-Back
> >
> >
> > -----Original Message-----
> > From: Scott Williams [SMTP:scottw@zoomnet.net]
> > Sent: Thursday, October 09, 1997 11:22 PM
> > To: Dakota Mail List
> > Subject: DML: Backfiring
> >
> > I'm having a problem with my Dakota (96 Sport CC 4x4 3.9L 5spd 3.55)
and
> > looking for some help.
> >
> > When its cold, it hesitates really bad and then backfires thru the
> throttle
> > body. (I'm talking a really loud boom.) After it backfires, it seems
to
> > run ok. It also will do this under hard acceleration when climbing a
> steep
> > hill. I've had the truck to the dealer twice with no results. The
first
> > time they updated the computer. The second time they said the base
index
> > time was retarded 8 degrees and readjusted it. This seemed to help a
> > somewhat on the hesitation but it backfired twice today.
> >
> > I would like to get this fixed before I blow a hole thru the hood or
see
> my
> > Dak go up in flames. :-O
> >
> > Does anyone have any suggestions?
> >
> > Scott
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