09 Buick LaCrosse Intermittent Misfire P0300 

Thanks Andrew K, you've been a long time encouragement to me

True, I need to learn WHY not just How.

@@ScannerDanner You are very thorough & excellent at explaining 'quick theory' ( there's an oxymoron !) that directly relate to the possible problem(s). This shows that you have been able to learn think logically & deeply about a particular subject/problem & then demonstrate your deductive reasoning. The main theme that you always stress is the multiple approaches to a problem which encourages people to think for themselves & not some complex flow chart. The practicality & speed of CORRECT diagnosis without damaging components is your forté. Thank you sir! " In order to think deeply one must first learn to think clearly." - Nikola Tesla

@@pedrorojascervantes3928 what a compliment! Thank you so much for this blessing today

@@ScannerDanner You are most welcome my brother in Christ! Maranatha! Come quickly Lord! May the Lord bless you more as you continue to bless others so selflessly!

Matt! Thanks my friend

Thank you so much for this comment!

Thank you my friend

Thanks my friend. I'm certainly not the best but I do love what I do. Thank you again!

Isn't that the truth. I learn something every time.

thanks Wyatt, it comes from hearing those questions in my head before they are even asked. How? Because I hear you guys in my head all the time! lol

I appreciate that!

Awesome!

His book is beyond amazing . It has helped me more than the dozens of other books I have all put together . Best automotive teacher on Earth .

Thank you!

Same here. That's why I bought good quality boot pulling pliers many years ago, straight and angled. They aren't the answer to all boot pulls, but they'll do most.

@@karpenterken1 Years ago I built a box with 8 spark plugs wires coming out of it, with spark plug ends in a "pass through" "Y." You plugged in the plug tip end to the plug and the plug wire end to the sp plug wire from the distributor. The wire to the box was grounded to see if the the cylinder was working. Beats getting zapped!

Thanks man! But I haven't gone anywhere have I? Just curious, I've been uploading here consistently, more so since Caleb is helping me, but I've not had any long time away periods. Maybe you just weren't being notified?

thank so much for the support!

That's awesome to know... thank you! I have 5.5s, but in case of loss, knowledge is power...

Was going to post the same you beat me to it

Xavier Gonzalez subscribe to his on-line class, it’s worth it 💯 %

@@HomieHektor thank you!

@Xavier Gonzalez thank you!

Online class and videos are golden. I've used the videos more than once to reference back to on something I was working on while working on it. I take my smartphone which can share the data with my scan tools and my iPad so I can pull stuff up on site. One thing to remember though if you ever get shopkeypro and are a mobile mechanic make sure that's part of the subscription. I actually wrote it in the contract that I signed, scanned and emailed back to them as they monitor piracy closely so when they see you popping up on different ip addresses which are tied to different cities as mobile data can be they won't shut you down for violation of terms of service. They know my Snap-On scan tool serial number and know what other scan tools and devices I use to access their database so I'm good. I stay under the 6 user threshold so im sure that helps. On a side note @Scannerdanner check the 19.4 update as they'll have the access for FCA vehicles. You as a tech, shop or tech with a shop invited by them have to register. Gives you FCA authentication as with the networks they want to know who's in these cars if they're doing network diagnostics for repairing and deleting codes afterwards. Fee is $50 per year. After so many techs on plan each addl per shop is $2 per tech. So basically since as a business I paid the $50 I can put xxx amount of employees on for example and after so many then each addl will cost $2 per employee. Another way for them to get more money. That fee will have to be amortized to the customers thru the shop fees thru the year. More ADAS functions as well were added. Works with alot of the newer scan tools such as Solus Edge, Modis Edge, Verus Pro, the D8 and the other they came out with in the same 6 month stretch as the D8 along with the Zeus and other mentioned ones in the update flyer. This would be for the FCA access. I haven't dealt with the FCA yet so I'll hold on paying the $50 fee. Do you or anyone else know if the new FCA deal will work thru the OBDII or will we need the workaround FCA cable that plugs in over center console area as I have that as I had someone who I was going to do a job for once and they backed out last second. One thing I've found is people sure squak alot about paying a scan fee but I tell them I'm not going to just throw parts at your car. Paul you've helped me alot with my confidence as moving from class 8yrs ago to automotive which I'd actually did in high school but gravitated away from until the last few years. I've always did my own repair work and even did the parts cannon a time or two and out of frustration from the dealers misdiagnosis and refusal to acknowledge or even refund for it I bought your book in 2014ish and the rest has been history! 🙏 👍👍👍👍

One other test I would like to see is with a multimeter. Ohms

Ohmmeter testing of these types of circuits is weak at best. When an ohmmeter measures bad, it's bad, but when an ohmmeter measures good, it can still be bad. You won't see me using that tool very often for that reason.

@@ScannerDanner Ok, but I have used coils laying around I would like to check.

thank you my friend!

The current ramp was obtained from the primary ignition side. If you're looking for the voltage waveform, you probably can not get it at the module since the transistors are inside the module. However, if you removed a coil and put jumpers in it's place, you should be able to probe at the jumper.

The driver and power feed for the primary circuit is underneath each coil so you cannot view primary ignition voltage waveforms on this model. But you can view the PCM to ICM control signals, and primary current of course. Thanks!

@@ablackformula there you go, jumper wires and it can be done :-)

the MT2500 was a scanner (red brick), the MT2400 was the original Vantage