Quote:
Originally Posted by clar
I am running my gas millage tune and getting some pinging at low rpm .
I have been turning the spark up 1% for the different rpm settings is this the correct way to remove the ping.
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If "up" means "advanced", this is what causes ping. With the ignitions I'm used to, an over-advanced spark causes pinging under load (hard acceleration). At idle, an over-advanced spark causes an unstable idle - it sort of "hunts" and can't quite figure out where to settle.
But, I'm really a newbe to these PCM controlled spark curves. I only totally understand the mechanism in a distributor.
I've never seen ping at "low rpm".
I'd have to say though, if I were getting pinging, I'd reduce (retard) the spark. But, if it's a custom tune, you should be in touch with the guy who did the tune. He needs to fix it - it's not something you should be trying to "improve" on.
- Jack