Random misfire according to autozones scan tool

[Mollythecow]

Hey all, my 02 Chevy Tahoe lt with auto ride and 209, 000 on the clock started running rough so I got it scanned autozone but the print out offered no details other then remove and clean my fuel injectors.

The misfire is definitely fuel injector related because it'll start and run perfect one time. The next time it's running so bad it feels like the pistons are swapping holes.

The cats are missing in action so the CEL stays on all the time.

Thanks for reading.

 

[Rocket Man]

That’s not a diagnosis that points directly to fuel injectors. It could be any number of things, the only thing for certain is you’re experiencing random misfires. You need to get a good scanner that reads real-time data so you can see which cylinders are misfiring. It could be plugs, wires, coils, injectors, MAF, etc.

 

[Mollythecow]

Thanks for your reply. I was pretty certain a good scanner was gonna be necessary to figure this one out.

 

[Mollythecow]

New pcm and antilock brake module did the trick. All my grounds were good & ran one tankful of Wally world injector cleaner through it so far. She's running great although a tad bit smokey during wot. Not bad for 18 years old and near 210, 000 miles. I'll take it.