05 Trailblazer idles rough and stalls

[needham24]

I have an 05 4x4 trailblazer that idles rough and stalls when the vehicle is turn sharply or if the a/c is turned on. Vehicle has a jumping feeling when put in drive or reverse. Receive code (P0301 Cylinder 1 Misfire Detected) when diagnosed. Freeze frame data as follows:
Freeze Frame Information Parameter Description Value DTC for which Freeze Frame was Stored P0301 Fuel System 1 Status Closed Loop Fuel System 2 Status Not Supported Calculated LOAD Value 81.96 % Engine Coolant Temp 167.00 °F Short Term Fuel Trim - Bank 1 -7.81 % Long Term Fuel Trim - Bank 1 8.59 % Intake Manifold Absolute Pressure 18.95 inHg Engine RPM 1,490.00 rpm Vehicle Speed Sensor 9.32 mph Ignition Timing Advance #1 Cylinder 23.00 ° Intake Air Temperature 118.40 °F Absolute Throttle Position 30.98 % Commanded Secondary Air Status Atmosphere / Off

[needham24]

Only work i have performed so far have been a throttle body cleaning and spark plugs have been replaced.

[maxwedge]

Pull #1 plug see what it looks like, did this start before or after the work was done?

[needham24]

Vehicle had problem before changing plugs just was not as severe as it is now. Plug #1 had the normal signs of an old plug but nothing that showed any other problems.

[maxwedge]

Without actually looking at the truck, does it have a low speed misfire like a bad plug? If so confirm the #1 coil is working, switch it with another cyl see if the misfire code moves with it, also if it has a dead misfire and the coil and plug are good, a compression test is in order.