Ok, I programmed my 01 dodge ram quad cab 360 5.9L auto trans with the hypertech. I've noticed a lot of chatter/spark knock at high RPMs since programming it. I programmed it to 87 grade fuel and didnt' touch any other settings such as tire size, speed limiter, rev limiter, etc. Any clue why i get so much chatter?

 

Did you have 87 or better in that tank, or was it still 85 octane?
Did you install a 180 t-stat?

If your pinging on the mid grade setting, you could run premium, that would probably take care of it. You could also try changing your plugs to one that is a temp range lower. I like the Autolite 3923.

 

I believe it already has the 180 degree stat, the temp has always been between cold and 210....with a normal stat, does it stay on 210?

I had 87 in the tank, I didnt' know 85 even existed. Next time I fill it up i'll put 89 in it and see what happens.

 

In the mean time, you could try putting in a can of octane booster so you don't ping for the rest of this tank until you get a chance to fill up with higher octane.

I might have had the numbers wrong (I think here in Colorado we have 85, 87/89 and 91 as the three choices). My point was, make sure you have a full tank of mid grade or better, what ever that number is in your area.

 

I had the same problem when I installed the hypertech on the 87 program and ran 87 fuel. I changed out my plugs to autolite 3923's and the problem was gone.

 

cool, thanks. i have a set of plugs sittin in the back seat gettin ready to be put in, will have to check and see what kind they are. I"m gonna get octane booster and run higher grade....until then i'll just keep my foot out of it.

 

Ok i put 93 octane and octane booster in it and it stopped....so i may program it on up to 93 octane on the programmer.