ENGINE IDLE ROUGH

I Did All The Work Myself Valve Cover Gasket, Spark Plugs Replaced, Egr Valve And Sensor Replaced All Brand New 02 Sensors Four, Coolant...

I'm Getting Codes I Don't Know. It's Idling Rough, Hard Starting And Will Go Into Reduced Power Mode.

The Vehicle Listed Above Is An Ls Model. So Basically, It Has Poor Idle Nearly Stalls At Stop Signs Or In Traffic Waiting At Red Lights....

Shorted Out Cylinders 4, 5, 6, No # 5 Had No Response. Remove Spark Plugs Numbers Two And Five Electrodes We’re Barely Worn And Slightly...

I Have Attached A Video. Engine Idling Rough. I Have Replaced The Timing Components, Camshaft Sensors And Solenoids. Replaced Engine Oil...

To Add To My Below Question, I Replaced Fuel Filter And Fuel Pump Recently, And Didn't Help. Also, I Tightened Vacuum Hoses To...

Changed Out The Purge Valve, Ran Pretty Well Going Home Cut It Off For A Few Minutes And Went To Start It Back Up And Have A Rough Idle....

I Drove Into A Hole Hitting The Vehicle Very Hard And Shortly After The Vehicle Started To Rough Idle, There Is This Intense Vibration When...

Went To Pass A Car And The Engine Immediately Started To Run Rough And Had No Power. Engine Light Came On. Checked Codes With Odb Scanner....

So This Car Starts Fine From Cold. About 3 Minutes Later After The Idle/rpm Settles It Starts To Idle Up And Down. Rev It High About 2000...