I`m not really sure of the noise you describe.
Backfiring is one thing,but popping or burbling a
little bit when going down a hill,or when the engine
has no load on it seems normal to me. Mine does
that,and I`ve seen it on many vehicles with a "loud"
exhaust. (My Dak has a conventional exhaust into a
race muffler,then split out to the rear.) It seems
like once the engine has gotten the vehicle up to
speed and you decelerate,there`s no load on it anymore
and it will sound different because your transmission
and driveline are pulling up the RPM`s that would
normally have a tendency to drop. But please keep in
mind that I have no official training as a mechanic.
However,I did stay at a Holiday Inn Express last
night. :) Steve P.
P.S. I start my new job tomorrow,in heating and
cooling. After twenty years of electronics repair,I am
conceding to the Chinese,and Walmart. So if your $169
27" TV breaks,do what everybody else is doing,and go
buy a new one that will last 1/10 as long! :)
--- BlackDak93 <sbarnett56@adelphia.net> wrote:
>
> I brought this topic up a few months ago, and I am
> still trying to find a
> solution to it. The problem is my '93 Dakota 5.2L
> with 5-speed manual,
> backfires through the exhaust on deceleration. I
> have been through hundreds
> of hours and many more dollars trying to resolve it.
> I have been through
> everything I can and been to several shops,
> including my friendly Dodge
> dealer to have it checked out. The Dodge technician,
> charged me $180.00 to
> tell me that there is abosutely nothing wrong with
> the engine. He believed
> the problem to be my exhaust. To make a long story
> short, it is not my
> exhaust, although it does make it more noticeable.
> Stock exhaust did the
> same thing. The second leading theory is that this
> is normal for Dodge
> Magnum engines, and the problem is worse with a
> manual transmission (it pops
> back when I let off the gas to shift). I am not
> willing to concede that this
> is normal, although I have come to the decision that
> the problem is the
> manner in which the PCM controls the fuel. My
> primary basis for this theroy
> is that when I install a different PCM ( I have
> three) the
> backfiring/popping/burbling disappears for about
> three days until, I assume,
> the PCM gets itself reprogrammed. Then the popping
> comes back. Every
> technician I have been to is unwilling to accept any
> other theory except the
> exhaust system and will not objectively pursue any
> other ideas. I am not
> going to put the exhaust back to stock just to prove
> them wrong. I have been
> studying my manuals, and have decided to try a 94 or
> 95 PCM, to see if they
> would work any better. I believe that a later model
> (pre-'96) PCM will still
> work. All the connections are the same with the
> exception of pin 5 which is
> a signal ground that goes to the DataLink connector.
> On the later model,
> this line is still grounded, but not connected to
> the PCM.
>
> I have a few questions: First, I would like to hear
> what you guys all think.
> Any new ideas about this? Has anyone tried running a
> 94 or 95 PCM on a 93?
> Also does anyone have a 94 or 95 PCM for a
> 5.2L-5speed with Federal
> emissions that they would part with? I would rent,
> buy or borrow just to try
> my theory. I have searched the internet and I
> believe that part number
> 56028262 is the correct part. There may be a
> 56028341 also, but I can't
> verify if that number is correct. Or does anyone
> have a Mopar Performance
> PCM number 5249542 they would sell? There is a
> remanufactured PCM out there
> made by a company called A-1 Cardone. Has anyone
> ever used one of these? I
> am desperate to get this fixed. I have had this
> truck for over 10 years and
> I love the truck. I spent a lot of money swapping in
> this engine but it
> makes me want to park the truck and not even drive
> it anymore.
>
> Any new ideas or help would be appreciated. BTW, I
> have gone through the
> entire intake/exhaust systems checking for leaks.
> Replaced the leaking belly
> pan gasket. All the sensors have been replaced and
> checked. Compression is
> good. Timing is good according to the Dodge tech.
> Distributor cam sync has
> been set. Vacuum has been checked. All the normal
> stuff.
>
>
>
=====
Steve P.
Two-thousand one (2001) Flame Red Dodge Dakota Sport RC 4X4,4.7L eight-piston w/3.92 limited-slip,air,cruise,tilt,knob(not shifter)induced four by,with optional hand crank windows and finger locks that added substantially to the overall cost. Steigerperformance air intake providing twenty additional RWHP (ten at the flywheel). PLUS,a custom dual-exhaust than is real loud,with gigantic 2 1/4" pipes sticking out the back,reminiscent of warship cannons primed and ready for the heat of battle. The other mods (headlight and taillight covers and black step bars) do not add significantly to the speed of this vehicle,but are there purely for intimidation purposes,as the markings of a cobra signify it`s deadly potency. Put simply,this truck cannot be stopped.
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This archive was generated by hypermail 2b29 : Tue Mar 01 2005 - 10:04:31 EST