Excellent work. I wish I lived closer and could bring my car to you!

Thanks a lot i just discovered that my fist coil is making misfire my car runs so bad and i disconected cable for coil on cylinder 1 and same thing tried on other 3 and they are ok now you help me to save much money i just know that is coil or spark plug on cylinder 1

Grat explanations wating for part 2

Great job. Of course hindsight is always 20-20. After successfully diagnosing a problem it's always easy to look back at the process and see how the problem could have been found faster, but if the misfire was caused by something else which it could have been, then the approach you actually took may have been faster.

Have you seen random misfires for a few seconds that ONLY occur after a heat soak (15-30min)? Otherwise, the engine runs great. New spark plugs, new coils and swapped fuel injectors w/o resolve? 2003 Passat 1.8T AWM, auto 2wd. P0300 P0302 P0303 P0304

I'm also curious about the immobilizer / delete. =)

I have the P0300 code on and misfire in all 6 cylinders the obd2 reader said , what gives ? , i also believe i installed the cheap model ngk spark plugs instead of NGKR spark plugs that i guess are required for these cars VR6 engines .

I’m having issues with my 1.8, I checked my spark plugs like you did and my ignition coil isn’t making it spark. I switched coils and it did spark. Would the issue just be that one coil?

hello! i have this same problem. my engine sound exactly like yours did. i unplugged the coilpack on CYL.2 and nothing happened. i can start it up and idles fine. but when i rev it over 2500RPM it starts to missfire and no firing on CYL.2, do i have the same problem as you or can it be something else?`im loosing my mind.. BIG regards casper.

Where can I get a compression tester and oscilloscope kit like used in the video?

Came across this video searching for hope on my Jetta I just bought. Did a valve cover gasket (changed nothing else, ran beautiful prior) now has the same thing happening. Autozone scanner said cylinder 3 and 4 misfire. Moved coils, switched harness plugs (ran worse) new Bosch iridium plugs (old ones seemed very black, was probably due anyways) then pulled plug for cylinder 4 while idling- no change to idle. (Also pulled plug on cylinder 3 and there is a drastic change) Pretty sure the same is happening. But find it a weird coincidence that it happened right after Changing vcg. I’ve pulled back the tape job on the wire harness checking for cracked wires (wires look Original) have found no issues down to the main split coming from beside the valve cover where it disappears into the abyss beside the engine. Doing compression test today to rule out that as well, but sounds like I’m in the same boat. Any input you may have would be great. I don’t have access to a scope like you have, is the control signal findable by an ohmmeter or anything else?

Is it safe to drive the car with one cylinder misfire for some days at low speeds? The engine is shaking quite often while accelerating and even when driving slowly. Sometimes it's fine too. I got the cylinder 4 misfire and the coil pack is faulty, gonna change it when i get the parts!

My Audi A4 just changed valve cover gasket and coil packs engine light back on for cylinders miss fire again do you know the reason?

Just out of curiosity what kind of headliner was on that car

2004 Jetta 1.8t here. Cylinder 3 misfire Code keeps popping up no matter what I do however the car seems to be running fine. Changed spark plug, swapped both the ignition coil and fuel injector with cylinder #2 however the code kept popping up for cylinder #3. Any idea what could keep throwing this code even if it's firing? Could it be a grounding issue for the ignition coil like I've heard or could it be the computer like in this case?

Hey nice vid, and now why you have misfire I have the same. And what you found now?

Did you do eeprom to the pcm?

I just dont understand why you took this approach. First thing I would have done is check the wiring diagram for that year/model and find color codes for that connector. You would have been able to certainly point out that the harness was indeed not the original one. Your reasoning for switching the connectors is not valid because again, you are making assumptions. Not good practice brother. Wonder how you 'fix' other misfire issues.

7:43 my favorite number... 318! =)

I have a stage 2 modded Audi '04 A4 B6 1.8T. Last night I was out for a spin after doing a bit of work on the airbox, and trying to adjust the aftermarket turbo inlet pipe for clearance. At first the car ran fine, but boost was down a little. TIP may have been squeezed a bit by the headlight. After a couple pulls on the highway I hit the off ramp. A few mins later, it started running a little rough, and then got worse fast. I barely made it home. Now the car runs *extremely rough, and it's difficult to even keep it running. At first I thought I blew a head gasket or something, but there is no water in the oil, and I'm getting misfire codes on every cylinder. So I'm wondering where to start looking. The car went from running fine to barely chugging home in a *progressively worse fashion in a matter of minutes. Any ideas on where I should start my diagnostic search? P0300 code plus a code for every cylinder. ~thanks

Man you guys really need to learn how to use the scope , take advantage of its capabilities. ! You could had zoomed in and gotten a clear view of the coil signal and or the command..great to have a pico scope..thanks for the video , glad to see you got lucky and made a decision on the bad computer , or was it ?

Ök danke

cant tell if youre being sarcastic on some things bro.

Where can I get another ecu box with the same box numbers 🤔 instead of down tuning my original box.?.

Hallo ich habe ein broblm est golf 5 1.4 benzin code PO191 bitter awh PO302