Shifting issue in '95 Z/28
I've got a 1995 Z/28 Convertible, with a 4-speed auto. The car has 60K miles on it. I perform regular oil changes in the spring and only put about 3K miles on it a year.
Approx. 6 years ago, had all the fluids changed, but other than that, the car is factory stock (original). Starting this spring, whenever you floor it, once the RPM reach about 5K, it just starts choking/puking/cutting out/back firing. When you get out of the gas, it's fine. Any other time, it ABSOLUTELY purrs and runs like I've experienced over the 11 years that I've owned it. It DOES NOT throw any kind of "Service Engine Soon" code, and I've even plugged in my scan master to see if there was a code stored, however, there is not.
I'm completely lost as to why it's doing this. Any ideas?
Thanks in advance for any help.