I've been watching your site for over a year now and am very impressed with your ability to troubleshoot and find wiring problems. I've been a farm mechanic, shade tree mechanic since 1977. I really enjoy a challenge and electrical troubleshooting is my favorite. But I get lost at times in my work. But I never give up. When it comes to watching your Shows, I love the in-depth explanations and information you pass along to us. It's greatly appreciated. You are a gifted person. I wish everyone in the automotive industry could be as and honest as you. Great job, keep up the good work.

Great video for maf vacuum leaks

Very knowledgeable

Surprised it didn't have a code with the vacuum leak and the Dirty maf sensor Causing the huge Fuel trim corrections making the system Rich because it was Way to Lean nice work Eric O @SouthMainAutoRepairLLC

So am guessing that the MAF sensor wanted it rich, the vacuum leak caused it to be lean and there seems to be some sort of halfway house where it was wrong but not wrong enough to light a code…
.Cool beans

Negative and positive "pressure" is how science defines it.

best explanation i have ever seen thanks good job

2 brake cleaner climaxes, very thrilling! ( – :

I enjoy and learn something from all your videos. Keep keep it up.

New subscriber, watching and learning.
I just watched you channel on o2 sensors and vacuum leaks.
This was very informative and I really appreciate your video. As with all the previous videos, binge watching. I find them very educational.
Thank you again for all you do!

Chevy Mass airflow sensor Needs replacement always..lol yeah I always try the cleaners first.

So did you fix that idler pulley or whatever else that was going wrong with the front of that engine or at least to tell the guy that it was about to throw a belt lol

So if the damn thing grenades during your 3000 rpm testing are you responsible?

Great info.

I used to work in the field, and I've seen a bunch of these videos. And this technician is topshelf.

Great info

You would of verified but your not a rocket surgeon and great tenacity.

I love that you tested the wires going to the sensor before just replacing it 👍. When I see the hose loose underneath the hood I imagine like someone trying to see if you are a scammer 🤣. Good job man 👍

Hi Eric, My daughter’s 05 Tahoe (which she dearly loves incidentally) has a money light issue. I’ve taken it twice to a friend who operates an independent shop. They clear codes and have run smoke tests (twice) with no determination of the source of a leak which we suspect might be causing the codes. My daughter’s ex-husband being somewhat of a useless mass of carbon, tried fixing the truck himself a couple of times and ended up replacing the downstream 02 sensor, but of course he cheaped-out and bought a Chinese knock off to save about ten bucks at Auto Zone. He claimed to have had a buddy of his who knows what he’s doing diagnose the problem. That’s how he came to the conclusion that the downstream O2 sensor was the culprit. I can’t have my granddaughters out there riding in a truck with issues which might at some point cause a breakdown on I-95. Additionally the truck has failed state inspection now, and she can’t get her registration renewed until the problem is fixed. So I’m done playing around with it. I ordered new upstream and downstream O2 sensors and a new MAF and will put all three in this week, then I’ll clear the codes using my cheap tool and see what happens. I also found the vacuum leak on the truck in this video to be interesting. Given its location and fact that it’s not easily seen, it could be where the leak on the Tahoe is and might not have been detected during smoke tests. So I’ll be checking that hose on her truck for sure. If these don’t do the trick, I’m driving it to NY and leaving it with you so you can give it a try. Its only 4 or 5 hours to your lovely area and I don’t care if it takes you two weeks be able to get to it. I’ll leave it with you to get it fixed the right way. There are a few other things you might be able to help with too. Lucky for you this truck lives in a more southern state and hasn’t been exposed to the road salt you fellas suffer with up there. So rust won’t be what you typically see on NY vehicles. I’m just tired of playing around with people who are supposedly skilled and trained experts, but who don’t know much more than me (a retired old sales guy). I know these people are well intentioned but it seems to me that they don’t have the skills necessary to properly diagnose and repair these systems. The dealerships are even worse I’m afraid. They hire youngsters fresh out of tech school and then set about training them how to increase revenue for the dealership. BTW, this isn’t a rant, so please don’t mistake my attitude here and get the idea I’m a snobby jerk that you don’t want to deal with. I’ll be nice I promise. So if by chance you happen to see my comment here, you might be hearing from me in a few days. Thanks, BK.

You helped me identify a vacuum leak for my roommate I would have never found.. on that exact same truck.

For the amount you paid for that thing, It should have an auto setup for any vehicle.

I remember dad haveing a fit about his wipers on his 60 willys jc5 they work great til you start moveing well dad pulled off the vacuum tank and the little check valve and tossed them although he got the jeep and they were in a box on the seat and one morning befor school I went out run new hoses and installed the check valve and vacuum can and balls and check valves for the items that needed vacuum to work properly and went washed up and took off for school

Thanks posting you have helped me fix a problem i had with my 2004 express van 6.0 lq4 i had 16 % long term fuel used a smoker i made and found
3 vacuum leaks.

I wish I lived by your shop