Hesitation under hard acceleration

[D&Gbuick]

Just bringing my stock 87 GN out from winter storage. Spent the previous summer getting her in order and was able to put 3-500 miles in the car before putting it in the garage for the winter with no mechanical issues. The car was a blast to drive! After putting a few miles on the car this spring, I have noticed some hesitation and popping under medium-hard acceleration. Not sure where to start, so i'm hoping for suggestions. Again, it's a stock car, with exception of turbo tweak chip. 93 octane. Other than backing out of the garage about twice a month to keep battery charged, car has sat since October. Any help, clues or direction is greatly appreciated

 

[scgnx2]

Just bringing my stock 87 GN out from winter storage. Spent the previous summer getting her in order and was able to put 3-500 miles in the car before putting it in the garage for the winter with no mechanical issues. The car was a blast to drive! After putting a few miles on the car this spring, I have noticed some hesitation and popping under medium-hard acceleration. Not sure where to start, so i'm hoping for suggestions. Again, it's a stock car, with exception of turbo tweak chip. 93 octane. Other than backing out of the garage about twice a month to keep battery charged, car has sat since October. Any help, clues or direction is greatly appreciated

If you have a scan master post the various readings at idle. If you don't, invest in one. Until then it's all a guessing game.

 

[No disintegrations]

How do the plugs look? Could be fouled from carbon, condensation, moisture, slight rust etc from a stored car.

 

[hrhoward]

.... After putting a few miles on the car this spring, I have noticed some hesitation and popping under medium-hard acceleration. ..

Also check all the vacuum lines for brittleness and such.