So he ran a 14.4 "Bone Stock" and a 14.2 with all the mods??? Something
else is wrong here...and he's got all the "good stuff" in there but
nothing to help is "breathe" better. (Hint hint...Throttle Body). ;)
I normally don't trust the O2 sensor voltages for A/F since their not a
Wide-Band. Dyno testing for the A/F is normally the best route. (Same
thing goes for A/F meters...stick a separate O2 sensor in the exhaust
for them.)
On the timing issue, again...we can thank Dodge for that screw-up. Some
run really aggressive and others...well...you've seen it on your buddies
truck.
Other neat little trick: Reset the PCM and then drive like a granny
with the A/C in the ON position for about 100-200 miles. Then...take it
to the track, turn the A/C off and you'll notice a BIG improvement in
overall performance (and not just because the A/C is off.) The Computer
thinks it's under a slight load at all times and readjusts the long-term
for it.
- Bernd
-----Original Message-----
From: owner-dakota-truck@buffnet.net
[mailto:owner-dakota-truck@buffnet.net] On Behalf Of Dave and Charlene
Sent: Sunday, July 08, 2001 11:59 PM
To: dakota-truck@buffnet.net
Subject: DML: Re: RE: "Advanced" question for the experts
> The 20-24 degrees is fine for WOT performance and it does slowly raise
> to about 28 degrees at 4900-5000rpm. (Checked that with both my
> laptop and scanner on a '99 R/T - Supercharged though.)
>
That seems low though for the MP PCM does it not???esp. when my stock
Jeep PCM goes as high as 31-32. BTW, this 99 MP PCM never went over
24deg.(at
wot)
> How did you check the mixture to verify that it's not leaning out at
> higher RPM? (Simple question...nothing else.)
>
I'm going by the O2 voltage,its about .90 at WOT
> Now, getting to the point of feeling "dead" while driving, if you're
> referring the sluggishness from idle to about 2400rpm, well...put a
> 2400 stall converter back in and that will be fixed. 2800+ for the
> street us just plain silly.
>
I guess I should explain that better.its nice and snappy,and runs fine,
just seems to lack midrange torque,and doesn't seem to start making good
power till about 3500 or so.
> Also, you didn't mention anything about a modified throttle body. All
> those mods and a stock TB is really holding back that engine. Average
> gains from a Flometrics Billet TB (on an R/T) is about .2 seconds
> quicker in the 1/4 mile.
Yes I told him that and he has one coming. Thanks for all the info
sofar!
Dave St.Louis
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