More Knock issues

[TTA 1077]

I got into it and noticed about 2.9* Knock retard with about 832 milivolts o2 @17lbs boost. I had just put 10 gal. 93 and redline fuel system cleaner in. I've also noticed some drive line clunk when shifting from P to D or R. Could this be bad batch of fuel or false reading from drive line noise? Tested again in OD and got 4.2* with 828 milivolts. Whats up with this? Thought I had the Knock issue solved!

 

[WS6]

Run some more gas through it...without the additives..Buy your gas somewhere else on the next fill up and see how the car runs then.

My Corvette buddy also flys Pipers and his EAA chapter has gasoline sampled from all the local stations to check for ethanol content.

I was surprised to learn that only one company stays within thier advertised 10% ethanol content. One was dilluted as much as 17%.



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[TTA 1077]

I'll try that! I use Hess, there not supposed to use a lot of ethanol, but of course this is NY though! I wasn't sure if it was the Gas because my o2 readings looked ok.