[DeTomaso] Techno question: Lean carb and engine pinging

Charles Engles cengles at cox.net
Tue Jun 5 21:57:50 EDT 2007


Dear Forest,

             Thanks.   I think that explains my pinging problem.  Now......I 
get to put the timing curve back to max.   :-)

             You're a prince.

                                    Warmest regards,  Chuck Engles



----- Original Message ----- 
From: <forestg at att.net>
To: <detomaso at realbig.com>
Sent: Tuesday, June 05, 2007 7:30 PM
Subject: Re: [DeTomaso] Techno question: Lean carb and engine pinging


>
> In a word, yes. It raises the cylinder temperature.
> Forest
> -------------- Original message ----------------------
> From: "Charles Engles" <cengles at cox.net>
>>
>> Dear Forum,
>>
>>
>>              Just got the Pantera back from the mechanic.  I thought I 
>> had a
>> miss and had them run diagnostics.   The good news is that the abused
>> welded-upon MSD was working fine, but the exhaust gas analyzer showed 
>> that one
>> cylinder bank was running lean.  They adjusted the carb and things do 
>> seem
>> better.
>>
>>             Last summer, I was fighting a pinging problem that finally 
>> improved
>> by backing off the MSD distributor advance curve.
>>
>>             Can a lean engine mix lead to pinging when previous engine
>> parameters (CR; timing; octane) remain the same???
>>
>>
>>
>>                     Engine rookie, Chuck Engles
>>
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