It does backfire, mostly between 1st and 2nd gears but the popping and
burbling which happen anytime I decelerate are, at least in my opinion, much
more than what could be considered normal. My exhaust is not extremely loud.
It is actually pretty mellow compared to a lot of trucks around here. I have
shorty headers, a high flow cat, a Magnaflow XL with 2.5" dual tailpipes.
The 2.5" tailpipes are probably too much, but I have had 2" and 2-1/4" and
it did the same thing. It did the same with a stock muffler, a turbo
muffler, a Flowmaster 50 an IMCO chamber muffler and with resonated tips and
a glass pack between the cat and the muffler. I even took the advice of the
mechanic and dropped the factory 3" pipe bwtween the cat to the muffler down
to a 2.5" pipe. I wish I had not done that. It made no difference and it
messed up a pretty sweet looking exhasust system.
"steve preston" <steves287dak@yahoo.com> wrote in message
news:20050213193645.63951.qmail@web41828.mail.yahoo.com...
>
> 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