Recently bought a 07 silverado 1500 classic 4x4 and just love this truck it has the 4.3 engine and now I am getting a misfire in cylinder 4 . also just had lifters replaced before all this began the mechanic cant seem to find the problem but loves to replace things and get my money . plugs , cables , distributor cap and rotor were replaced and coil pack . I get a check engine https://19216801.onl/ https://routerlogin.uno/ light on steady and after about 2 or 3 miles of a steady cruising speed it will start bogging down or slit hesitation and when I hit the gas it starts to sputter and then it eventually clears and speed starts going up fast please help

 

Here are all the codes for a P0304 condition:

P0304 CHEVROLET code possible causes

• Faulty spark plug 4
• Clogged or faulty fuel injector 4
• Faulty ignition coil 4
• Fuel injector 4 harness is open or shorted
• Fuel injector 4 circuit poor electrical connection
• Ignition coil 4 harness is open or shorted
• Ignition coil 4 circuit poor electrical connection
• Insufficient cylinder 4 compression
• Incorrect fuel pressure
• Intake air leak

I hope this helps you out.