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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