Monday, January 17, 2000, 12:49:41 AM, you wrote:
> 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!"
Does it count if you only ping with the MP computer or is this a stock
pinging research exercise?
--Mike
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 11:46:50 EDT