2016 Buick Regal Chugging/Hiccuping While Driving

[Buickregal1995]

I have a 2016 Regal (2.0) with just over 40K miles. In fact, it's probably one of the last out there with remaining powertrain warranty from GM. I recently did a round of maintenance on the car myself, including: new spark plugs (OEM), new engine air filter (OEM), and cleaning the throttle body. Almost immediately, I noticed when I am driving I can feel a very slight chugging/hiccuping/hesitation when accelerating (even if using cruise control). It almost feels like when a transmission slips, but it does it every 2-3 seconds when the car is going specific speeds. For example, in between 40-45MPH (on cruise control) and 75-77MPH I can usually get it to act up. Any ideas on where to start before I take it in? Dealers around me have trash service and even with a warranty, they try to charge outrageous diag fees.

Lastly, I have had a slew of transmission problems in the past 12 months. I've experienced hard shifting, slipping, and delayed shifting. GM performed the 18-NA-358 bulletin (upper/lower valve body replacement). The tricky part is I did my maintenance right around the same time as the repair so not sure what the culprit is. I have noticed when the car is chugging/hiccuping, usually the shifts before/after flare up. Flare as in the RPMs will flare and then I experience somewhat of a harsh shift.

 

[MelsRegal]

I have a 2016 Regal (2.0) with just over 40K miles. In fact, it's probably one of the last out there with remaining powertrain warranty from GM. I recently did a round of maintenance on the car myself, including: new spark plugs (OEM), new engine air filter (OEM), and cleaning the throttle body. Almost immediately, I noticed when I am driving I can feel a very slight chugging/hiccuping/hesitation when accelerating (even if using cruise control). It almost feels like when a transmission slips, but it does it every 2-3 seconds when the car is going specific speeds. For example, in between 40-45MPH (on cruise control) and 75-77MPH I can usually get it to act up. Any ideas on where to start before I take it in? Dealers around me have trash service and even with a warranty, they try to charge outrageous diag fees.

Lastly, I have had a slew of transmission problems in the past 12 months. I've experienced hard shifting, slipping, and delayed shifting. GM performed the 18-NA-358 bulletin (upper/lower valve body replacement). The tricky part is I did my maintenance right around the same time as the repair so not sure what the culprit is. I have noticed when the car is chugging/hiccuping, usually the shifts before/after flare up. Flare as in the RPMs will flare and then I experience somewhat of a harsh shift.

Do you have a check engine light on?

 

[Buickregal1995]

nope

 

[MelsRegal]

nope

Then recheck the work you did, plugs are correctly gapped, electrical connections are not shorting out, no leaks in air filter housing or ducts leading to it.

 

[TurboreGAL_watchout]

Check your fuel cap. If it’s not engaged appropriately it will create a bad air/fuel mixture. You may need a replacement if you seal is cracking.