Help, why is my engine knocking?

[JimTMich]

Still Knocking

Well, I set the timing to 10 degrees with the sprout connector removed, engine warm. I ran 87 octane through for 2 tanks and it's knocking like crazy on 0F degree days.

Haven't got it yet.

 

[95GTvert[bv12]]

did you try replacing the sensors yet? also try using 89 octane...but you should be able to run 87 octane with 10* base line

 

[Joes95GT]

Well, I set the timing to 10 degrees with the sprout connector removed, engine warm. I ran 87 octane through for 2 tanks and it's knocking like crazy on 0F degree days.

Haven't got it yet.

From what I've found, winter gas is more oxygenated which isn't going to help the pinging at all. Todays 87 is just a step above Propane. Don't run that trash. Don't throw in a whole tank of 93, but just try maybe 1/4 a tank and see if it works first before you fill her up.

Joe

 

[JimTMich]

did you try replacing the sensors yet? also try using 89 octane...but you should be able to run 87 octane with 10* base line

I replaced ECT, AIT, and cleaned the Maf.

From what I've found, winter gas is more oxygenated which isn't going to help the pinging at all. Todays 87 is just a step above Propane. Don't run that trash. Don't throw in a whole tank of 93, but just try maybe 1/4 a tank and see if it works first before you fill her up.

Joe

I put in 10 gallons of 93 and the knocking went away.

Do I just have to live with more octane.

BTW, Over the years I have found that running 93 I get about 20% better mileage. Which pays for the 93 octane. I'll have to keep my eye on it now that I have made changes.