Bruce:
Many years ago I had a similar problem on my Japanese car. No matter
how much I retarded the timing, it still pinged. Turned out the distributor
springs had gotten weak, and would let the dist. advance the timing too
rapidly as the RPMS rose. Replacing the springs (less than a dollar, as I
recall) did the trick.
I would suggest that you also make sure your vacuum retard is
working. I figured out this weekend that mine is dead. It must have a hole
in the diaphragm, as I can apply vacuum and it doesn't budge. If I
disconnect the vacuum, the idle speed remains unchanged.
Just a couple of thoughts....
Vance Navarrette
1974 Mimosa TR6
-----Original Message-----
From: Simms, Bruce CIC [mailto:Bruce.Simms@SOCO.Sk.Ca]
Sent: Monday, June 17, 2002 4:53 PM
To: '6pack@autox.team.net'
Subject: Upgraded plug wires & ?s re Distributor Advance & Timing
<snip>
92 Octane unleaded (Shell Optimax Gold)is the best in my area. Timing
retardation to completely eliminate pinging robs performance and gives 500
rpm idle. The local mechanic retarded timing to 10 degrees ATDC which still
produced pinging. I'm thinking about setting timing advance to give 700-850
idle, providing pinging is only at less than cruising speeds. Advice?
Thanking you in Advance as I guess I really have several questions.
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