LSPI { low speed pre ignition } is scary…GM 2.0T

[doublebase]

An automatic programmed for fuel economy is bad for LSPI. As with high load demands, it's too reluctant to downshift, causing the situation for LSPI to occur, but better fuel economy.

One could manually shift gears to maintain a relatively high engine speed when they are driving like they stole it.

That’s some interesting points there.

And I noticed it happening with my 2018 Chevy Silverado. When my Silverado would stay in OD on the highway when going up hills, the thing would lug and even misfire. Drove me nuts! I’d also get it pretty bad when I’d first start the truck and drive slowly. It would feel like a fish bite. Like a fish was biting a fishing line.

Traded the truck in with 52,000 miles on it. All easy highway miles, no towing, plowing hauling, working in it. It just couldn’t handle easy commuting. Babied. Imagine maybe if I drove it hard it would have been better.

 

[ARCOgraphite]

That’s some interesting points there.

And I noticed it happening with my 2018 Chevy Silverado. When my Silverado would stay in OD on the highway when going up hills, the thing would lug and even misfire. Drove me nuts! I’d also get it pretty bad when I’d first start the truck and drive slowly. It would feel like a fish bite. Like a fish was biting a fishing line.

Traded the truck in with 52,000 miles on it. All easy highway miles, no towing, plowing hauling, working in it. It just couldn’t handle easy commuting. Babied. Imagine maybe if I drove it hard it would have been better.

Sounds like you had a bad coil wire or a poorly indexed plug or two.
I always put my car in "S" when it starts lugging on hills. Then it will drop a gear. BC I was traditionally a MT driver and if the AT isn't doing its chores correctly I will be its Daddy.