After a little bit more research, it appears that the sensors may not be
quite up to spec. Checked another '98 5.2L and the timing wasn't at 40
degrees until 3100. This tells me that either Dodge has poor quality
control on their sensors (which help the computer to determine the timing
curve)...or...someone at the Computer Programming Helm thinks that we all
should run Race-Fuel. (Not a bad idea.) ;)
I'll check into this a little bit more.
In the mean time, ALL the people who are having pinging problems, please
send me the following information: State, Year, and Model Type (R/T, 5.2L,
3.9L, Auto/Stick). TedO gave me an idea that's also worth looking into.
- Bernd
-----Original Message-----
From: owner-dakota-truck@buffnet.net
To: dakota-truck@buffnet.net
Subject: Re: DML: Pinging Problem partially solved
Well Sat. night George Hernandez, myself, and one of my buddies w/ an Indy
Ram
were comparing our driving skills and as I hit the mid-top of 3rd. gear it
started pinging like crazy. This is w/ the 180 thermo., one range colder
plugs,
and home made cold air (these are the only things I could see changing the
pinging problem anyway). Sometime I would like to find out why it does
this(Bernd and myself didn't exactly go through a street-race, I mean
dragstrip,
style session w/ the tests). This was on 89 octane. Other things I have done
are
a home ported throttle-body, synthetic oil,exhaust(no headers), and yes it
does
have good wires (they shouldn't be arcing to one another). I don't have a
problem running 93 octane it's just he point that I don't think it should
ping
on 89 once in a while.
While I 'm here, the 2000 R/T's DEFINETLY run better than the previous
years. I
have beaten three fairly stock R/T's (98-99), and George's truck was running
way
better than any of those. All he has is a cone filter and he was inching up
on
me(had to back off in third because of that lovely ping sound). How about
next
Sat. (w/ some 93 in the tank) George?
Erich
"Bernd D. Ratsch" wrote:
> We used Erich Hanhart's '98 5.2L/5spd for this test (Stock except for 180
> degree T'Stat):
>
> After about 10 minutes on the Kal/OBD-II scanner, here's the results of
his
> pinging problem...
>
> At idle: Timing is at 3.5 - 5 degrees BTDC
> At part throttle (under 2000rpm): Timing is at 26-30 degrees BTDC
> At part throttle (above 2200rpm): Timing is at 38-40 degrees BTDC
> At WOT: Timing is at 26 - 28 degrees BTDC
>
> What we found was that from a part throttle to WOT "stab", the truck
pinged
> and only the timing had a delay of about 1 second to change settings (all
> other sensors reacted a lot faster), causing the truck to run at WOT and
at
> 40 degrees BTDC. This definitely will cause pinging. If the delay would
be
> shorter, the timing would have a better chance of adjusting to the WOT
> acceleration.
>
> What i'm concerned with is the 40 degrees coming in before 3000rpm. Under
a
> light load (22% shown on Erich's truck), this would cause pinging without
> the use of higher octane fuel.
>
> I wonder if this is what the problem is with the rest of the Dak's. (I
had
> checked mine and the timing is under 40 degrees BTDC until after
> 3100rpm...my truck doesn't ping at light throttle and never has.)
>
> Ideas anyone??
>
> Bernd D. Ratsch
> Pflugerville, TX
> 1997 Dodge Dakota SLT/CC - 2WD
> http://lonestar.texas.net/~bernd/Dakota.htm
> http://www.mopars.net/dak/bernd/
> bernd@texas.net
> ICQ: 39320084
>
> "Have I gone too far...Or has Toyota not gone far enough!"
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