Sounds liek to me the MAS
Bill Day
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----- Original Message -----
From: "Danny Burrows" <havenx@ksni.net>
To: <dakota-truck@dakota-truck.net>
Sent: Tuesday, February 04, 2003 9:53 PM
Subject: Re: DML: Hesitation, Stalling and Backfire
>
> TPS or Mass Air Flown
>
> DakotaPU93@aol.com wrote:
>
> >Hi DML -
> >I am the original owner of a 1993 Dodge Dakota, 3.9L, V6, 5-speed
> >with ~ 185K miles.
> >
> >This past summer my truck started hesitating. Towards the fall it got
> >progressively
> >worse but still very drivable with backfiring coming from I believe the
#5
> >cylinder.
> >Shortly thereafter and with the onset of the below freezing temps in the
> >Northeast it
> >would stall in the morning if not warmed up.
> >
> >Below is a detailed explanation of the SYMPTOMS + a log of the
maintenance I
> >have performed as well as a private garage.
> >
> >Thanks for your help...
> >
> >When the truck is first started up after sitting all night it hesitates
and
> >backfires.
> >Just recently it also has been stalling when coming to a stop. Then it
> >either starts or takes 5 minutes to restart.
> >If I rev the engine when coming to a stop it doesn't stall.
> >If I get on the highway during the first 5 - 8 minutes (before warm-up)
it
> >actually sounds as if the engine cuts in and out as if gas is not getting
to
> >the engine or being blocked.
> >
> >After 5 - 8 minutes of driving the engine is usually OK. Only minor
> >hesitation, and backfiring - NO more stalling.
> >
> >I'm wondering if my fuel injectors are shot? Or if my timing is off?
> >Or something else?
> >
> >I performed the following maintenance over the past months to hopefully
> >improve the performance but none seemed to have helped.
> >
> >The problem initially started in the May/June 2002 timeframe but not that
> >noticeable. It has gotten progressively worse.
> >
> >I drive ~ 15,000 miles a year.
> >
> >Oct 1, 2001 spark plugs, air filter
> >
> >July 28, 2002 replaced fuel filter
> >tried 2 applications of STP fuel injector cleaner
> >
> >Sep 14, 2002 replaced cap, rotor, wires, PCV Valve, Breather Element
> >
> >Nov 30, 2002 tried another application of STP fuel injector cleaner
> >
> >I checked my check engine codes and they dont indicate any problems.
> >
> >After having no other ideas I brought it to a garage this past week.
> >Their computer said my fuel pressure was 51 pounds, I guess it should
have
> >been inbetween 28 and 32 pounds. He changed the fuel pressure regulator
and
> >the retest
> >indicated the fuel pressure is in the correct range now. He also
> >administered a
> >fuel injection cleaning with a professional machine (hooked it to the
fuel
> >line, disconnected fuel pump, etc) Also included in that was cleaning of
the
> >throttle plate and idle control.
> >The result is that the backfiring situation is much better, it will still
> >occasionally backfire but not as severe or as often. The stalling after
a
> >cold start and hesitation and rough running on highway are still evident.
> >
> >Other bits of info: Original muffler and original catalytic converter
> >
> >Any help or advice would be greatly appreciated.
> >Thanks, Kev
> >
> >
>
>
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