no it doesn't. the new "Magnum" engines (3.7, 4.7 & 5.7L) do, but not the
older A-based engines.
Gabriel A. Couriel
-----Original Message-----
From: owner-dakota-truck@bent.twistedbits.net
[mailto:owner-dakota-truck@bent.twistedbits.net]On Behalf Of TomBuban
Sent: Sunday, April 24, 2005 5:48 PM
To: dakota-truck@dakota-truck.net
Cc: dakota-truck-moderator@bent.twistedbits.net
Subject: Re: DML: PCM
Does the Dakota have a knock sensor??? I thought this would retard the
timing enough???
Tom
jon@dakota-truck.net wrote:
>"Eric Luce" <ontheluce@adelphia.net> wrote:
>
>: Hi. I installed a Mopar performance computer in my truck about a month
ago,
>: and have been very satisfied with it.
>: As an experiment, I tried running a few tankfuls of the "medium" grade
>: gasoline instead of "premium" due to these wild gas prices. My question
is
>: ... I see no appreciable difference in the swith-over, and was wondering
>: what advantage I would gain in switching back ?? I am getting no
knocking
>: or rattling from this, so why is the premium so highly recommended ?? It
>: seems to like the medium grade just fine. Thanks in advance for your
input,
>: guys !!!
>
>
> As Bernd mentioned, its because of the advanced timing in the MP PCM.
>The more advanced spark makes the engine more ping or detonation prone,
>especially with heavy loads or towing (which is not recommended with the
>MP PCM). You are probably being helped out a bit by the 180 t-stat and
>the FIPK which are allowing your engine to run cooler than stock. When
>I installed the MP PCM in my '96 318, I had very noticeable pinging even
>on 93 octane. However, installing a 180 degree t-stat solved the problem.
>I did several other mods afterwards, some of which also helped with this
>situation, making it even more of a non-issue. In fact, I actually towed
>a 6,000lb trailer through the mountains of PA with the MP PCM in place,
>and didn't notice any pinging. This was an accident - I forgot that I had
>the MP PCM in there, and didn't realize it until I was about 3/4 of the
>way home. Once I did realize it, I swapped the computers since I
>fortunately had brought the stock one with me.
>
> I agree with Bernd also regarding the pinging - damage could be occuring
>even though you don't hear anything. If it were my truck, I'd be inclined
>to throw the stock PCM back in there if you aren't going to use the high
>octane fuel. (Actually, that's what I'm doing right now with my Dak.) I
>was at the pumps today putting some gas in the Ram, and the attendant asked
>"fill 'er up?" I told him, "not at these prices!" Yes, I am foolishly
>hoping that the price will drop; and the sooner the better! I put $21
>in the truck which put the needle *just* over the 1/4 mark; I don't think
>I'm emotionally prepared to handle an $80 fillup. ;-)
>
> Anyway, getting back on topic - another option you may want to look
>into, assuming that you don't want to stop using the MP PCM is to
>use the low or mid-grade gas with an octane booster. You'd have
>to check the prices on the booster and do some calculating, but who
>knows, the lower octane gas plus booster *might* work out to be less
>expensive than the high octane alone. (I doubt it, but hey, it
>doesn't cost anything to check.) :-)
>
>
>
>
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