10 reasons, 5 mins, 2reasons per min, 1reason every 30secs, excellent video...quick and to the point. 👍🏻

Awesome video!!!

You’re helping me so much to learn about the mechanics of cars rather than just blindly adding mods. Keep up the amazing work and I can’t wait to see your future!

My 3.4L V6 GM engine is more powerful today than it was back in 04. I changed out to Mobil 1 soon as I got it home. Been using it ever since. Changed out OE air filter to K&N. Changed out restrictive exhaust to dual exhaust with 1/2" larger pipes. Changed out to new OE plug wires. Bosch Iridium spark plugs. Change out AT fluid at 60000. Maintain the car all the time myself so I know the work is done correctly with the right fluids and oil. Changed to all LED lights, including dash light. Added performance tires and wheels which lets the vehicle roll easier (reduces road friction). Stuff like that.

I just saw you on a GMC commercial and I wanted to comment and say congratulations but comments were disabled on that video so I came here, congratulations on all your progress! It's so cool to see how far you've made it.

This has been your most short and to the point video I have yet to see, I like it.

I just keep modding it... doesn't loose power over time, just increases the potential breakdowns

Quite a comprehensive description there, and suggests many inexpensive solutions to maintaining power, much of which is manufacturer's recommended maintenance intervals...

Some of these things can be easily fixed (e.g. replacing a single cheap part), some not. It would be great if you could have a video explaining what to do to diagnose and fix each of those possible issues.

i had idle problems with my car, it was idling around 600rpm. after adjusting the spark plug gaps, at first start rpm went up around 2k and slowly fell down to perfect. its incredible how little things can cause big power losses.

Camshaft wear. I had an engine that was low on power. It ran just fine, quiet, smooth, started OK. It was the lowest power version fitted to this car so I thought it was normal. i decided to pep it up a bit with a performance cam, cylinder heads and headers. When i removed the cam it was so badly worn some valves must have been barely opening. Just replacing the cam with a new standard one would have given a substantial power increase. Once put back together the power increase with the performance parts was incredible!

An important detail about "knock" (detonation).... Detonation comes from either of two sources; ignition or pre-ignition. All vehicles sold in the USA since 1996 must have OBDII, which effectively demands monitored knock sensors. If the detonation is the result of ignition, retarding the spark (the system kicks it back a *lot*) controls it. If you hear pinging, it means you have pre-ignition caused by hot spots. Ignition timing does not control pre-ignition.

How about a fuel filter? I would think a clogged fuel filter would restrict fuel, especially under heavy loads.

dirty fuel filter sometimes makes your fuel pump work harder so you might wanna check that too. besides this pressure on fuel pump may cause damage so replacing it might be a good idea

friend of our converted his truck to propane and we did a tear down of his engine and it looked bran new, another thing we hav noticed our engines once getting around 36k miles is when we noticed a increase in fuel mileage, people dont like to maintain or do mantaince until they have a problem this is key to follow up on follow thur with proper maintence and you will be fine, again my friend came down from canada we had same trucks but he gets almost 3x the fuel milage we get, the tech, is there and yes after he was here for 8 months the dealer said he had a recall on his fuel system, ha, he said he wasnt changing anything, and he didnt,

We heard it from the engine expert. Absolutely Amazing Informative Video. Thanks so Much.

My car lost a lot of power when I started dating my 250 pound girlfriend.

this is by far the best car channel on youtube. thanks for everything!

I didn’t even see the video all the way through and I’m happy to subscribe to this Chanel’s content. Loving the detailed explanation🤯

Rust = weight reduction

Wow. 10 reasons in 5 minutes. Normally it's 5 things in 20 minutes everywhere else. Love those videos

Although you are right about ring gap increasing over time it is the wear on cylinder crosshatching that adds the most noticeable blow-by which is why a hone is essential for an engine build; with a worn cylinder wall there would be very minimal compression

Great video. Lot of enthusiasts focus too much on new parts and forget about good ol' maintenance.

Glad you got a sponsor. Checked it out and I like how it aggregates results.

I can simplify this for you... Ten reasons why an engine can lose power over time. Poor maintenance...Poor maintenance...Poor maintenance...Poor maintenance...Poor maintenance...Poor maintenance...Poor maintenance...Poor maintenance...Poor maintenance... Wear.

2:45 Jason silently judging from behind 🤣🤣🤣

i dont know why people thumb down your videos. your probably the best person at expaining such scenarios, better than most i have come across. chrisfix is another goody . keep up the good work 👍🙋‍♂️

one of my favorate video on youtube. good go dear you are only person that making amazing video first ever thanks on youtube.

I've got 600,000kms from a Land cruiser all original still running like new when I sold it. As well as getting hundreds of thousands of kilometers from other cars. My tips: 1) don't use the oil your manufacturer recommends, use synthetic oil according to your climate grade. For example, Toyota put 5w-30 in engines in Australia where it gets to over 40c and the engine starts burning the oil. I use 15w-50 2) Change your fuel filter annually and if you have a diesel with mechanical injection pumps, use a good quality fuel stabilising additive that conditions seals and rings while removing contaminants and algae. 3) Don't forget gearbox oil changes, and if you have a 4WD, transfer and diff oils too. Don't forget to grease all grease points in the drive line and suspension. 4) Flush out your radiator properly, I mean removing hoses, flushing the heater core, making sure no hoses crunch with rust when squeezed and use coolant that feels slippery and silky between your fingers.

I like how you not only listed diagnostic information about each component, but also ways to keep each component working optimally, but I'm wondering how often you might need to make adjustments and/or replace each component due to just normal wear and tear. I know each car is probably different, and each component is also maybe different, but maybe like a basic guideline would be good... like the air filter usually should be changed with every other oil change, or maybe if you live in a particularly dusty part of the country more often than that... or Catalytic Converters usually last for ~150 thousand miles... (I dunno if thats true or not)...

clean and simple, شكرا جزيلا

Man the more i watch your videos the more I love my car for being a brilliant piece of engineering. I have a Mitsubishi Galant hatchback E33 92' has over 125,000miles on the odo, and since I did not ever need any sort of repairs apart from the 6 month oil change. Heck I didn't even need to change my spark plugs in over 2 years as they are in pristine condition (white) as the engine makes perfect combustion. No engine knocks and no oil burning (well maybe a just little bit as after 5000miles the oil gauge goes from high to low - i use mineral oil). I bought it 6 years ago for 1,000 Euro (yes I paid extra because it was in very good condition and was serviced at our garage so it was a customer's car). In 6 years my repair list was as following: 3 x Air filters, 1 set of spark plugs just because (they were in perfect condition), 4 new tyres, 1 antenna rod, 1 battery, 6 x fuel filters, 6 x oil filters, 1 water spray tank (took it from my other Galant an E32), 1 section of exhaust pipe, 1 AC gas conversion intake nozzle (new AC gas regulation needed it). In 6 years I spent next to nothing for its maintenance and its as comfortable as ever and spacious, not the most powerful car out there but it is adequate for daily commute. Range is about 230 miles/ 50litres city driving, 350miles/50litres mixed and once pushed it to almost 480 miles highway only, which is pretty solid for a 1992' car. The only problem the car has is some rattling on the driver's door striker on heavy left continuous cornering (right hand steering wheel). All electrics work perfectly, even the original radio cassette (apart from the up-seek button that got stuck). The only problem with the car is my wife, she hates it, because it looks old design

The segment about Fuel Pumps is "partly" inaccurate. (For fuel-injected systems.) - It's not so much a reduction of "volume" of fuel flow. What is important is that a "weak" pump might-be pushing the volume, BUT... the greater question is: Is it creating the "PRESSURE" (PSI) needed on the injection-system? That PSI is important to push the correct volume of fuel through the injectors,... and it also affects the "atomization" of the fuel spray.

I thought this was an incredible video- very direct and to the point with such a clear explanation as to the importance of all of these factors. Thank you for posting- I really enjoyed it!

Having a vehicle with the vintage AMC 242ci I6 engine, it very basic to remove the cylinder head and clean things up and reinstall the cylinder head. Every five years, on the anniversary of the purchase of my vehicle, I remove the single cylinder head, clean things up, check things out, replace valve springs, clean the top of cylinders, tighten loose rockers, check push rods, and put a new head gasket in. If needed, I also change the exhaust manifold gasket, timing cover gasket, and valve cover gasket also. Using this simple and primative method, my vehicle recently turned 401,000,000 miles and still running very strong. I bought my vehicle new in 1996. I have had it 23 years. I have two years, one month, twenty days left until my next disassembly and deep cleaning. I am sure I can get another 35 years of service out of my vintage beauty.

This autoTempest website is actually awesome its just direct comparisons to all my normal search places, thanks for the recommendation I plan to use this in the future a bunch

A lot of engines gain power as they "loosen-up" with some miles on them, then eventually lose power as they wear out many tens of thousand of miles later. I had 2 Coyote 5.0 Mustangs which gained 3-4 mph of 1/4 mile trap speed once past about 20,000 miles. They were making more power than new.

Yet another great informative video, gotta love Jason's work

Short and straight to the point, good video

There is a lot more things that make a vehicle lose power and these are just major hits of why they do. Very good video

How about them fuel injectors.... VR6t!

Awesome video I wish I cud explain things as well as you do Best teacher ever !!!! Keep it up !

always check the basics....bought a 01 ram 1500 with a full plow setup for 2k...good shape..little rust and trans was rebuilt. ..seller said hard time starting when it was wet out and didnt have time to get into it....i took a chance and bought it. ..the plugs ,cap and rotor looked original and were worn down to nothing....gave her a tune up and she runs like new...75$ in parts 2 hours time.

Very educationally rich! Great presentation

Just like an old person, you need to replace or fix the broken parts.

You forgot Fuel Filter!:) Same issues as air filter, except with fuel.

Best explanation of possible issues explained nicely in a timely manner. 💗👌

Now I feel like leaving work, buying all the necessary parts, and adhere to Jason’s suggestions.

Number 11: Aging Go Fast Stripes. As Go Fast Stripes age, the car will lose 10 to 15 percent power.

i haven't seen completely the video but i already gave my like because i know it's going to be awesome.

Thanks for keeping it short, simple & easy to digest. Got an extra subscriber in 5mins

Great video! It explains all points you need to check out, mostly when you are trying to squeeze all the power from your engine.

Thank you , your one of the Best Teachers , I give you an A+ ...

This video explained in one word Wear

Solutions for the power enthusiast: 1.) K&n filter 2.) Lucas fuel injector cleaner 3.) Remove your catalytic converter 4.) Replace spark plugs often 5.) High flow fuel pump Furthermore would advice to upgrade your alternator, OEM alternators only give you the recommended amperage at high rpms.

Those bad plugs look great compared to the ones I pulled from my 328i a few months ago! They were so bad!

*I Am Happy That I Understood This Video!!* 😂 *Miracle*

for us old timers, valve seat recession, Camshaft lobe wear (reduced valve lift), increased clearances in big end bearings , weakened valve springs, coked up piston crowns. Also for the newer ones, clogged or worn injectors.

Man, my 98 Expedition just turned 240,000 and has none of these problems (that make it noticeable), save probably a need to adjust the throttle cable and I did replace the fuel pump (it was wearing out, FIXED). All fluids/filters get changed so that's not an issue. The thing runs, rides and drives like brand spankin new. If anything ever impressed me about it, this just did!

When doing fuel system upgrades its always wise to add an additional fuel filter, replace the fuel lines, and clean or replace the fuel rail.

Great info, thanks and keep up the good work

Appreciate the video. Ideas for improving at least some of those problems? Changing spark plugs is obvious, but what about all of those other deposits inside the engine? Some way to dissolve or blow them out, with additives and/or driving style?

Quick and to the point. Awesome job

Another nice video on cars. The section on piston rings and valve wear could have mentioned heat from turbos and high rpm can cause floppy pistons and premature wear of metal and rubber seals, So, keeping heat and rpm low will definitely help engine parts and the longevity of your car. I rebuilt engines for years and this was the golden rule. Great Content. Mario

So, basicly if you replace and rebuild all the parts you just mentioned, there is a possibility for the engine to run as new? A buddy of mine had an engine rebuild. He went from 10w40 to 5w50 over winter and 10w50 over summer (he does big milage). When he went to remap the ecu after the whole rebuild, the power at the crankshaft was showing ~10 hp less when the car was new (wow, you can read the brouchure). How would you explain that?

Luckily my exhaust system no longer has a catalytic converter. 😂😂😂

You talk about changing the air filter, but do not mention the fuel filter. Apart from that it is an excellent video. there are so many people out there that have no idea about what goes on under the hood, and end up getting ripped off when they take their vehicle in for maintenance/repairs.

This guy is on another level of smart and talented

A good way to keep your catalytic converters from clogging is to get an aftermarket exhaust without them. I did it and it's amazing

So do engine's ECU have the ability to detect and compensate for knock? That'd be a good video: discussing everything the ECU does

Super duper beneficial to know those point of failures.

Nice, precise and straight to the point

VR6 block spotted at the background

I installed a drop-in AEM air filter on my winter beater. Putting down so much power it broke the dyno

Spark plugs are a big one. When my parents bought a new car and gave me the old one, it consumed lots of fuel and it struggled expecially at the low RPM range. I decided to take a spark plug out and look what's the matter, I found that they were so burned out that the gap was almost twice as wide as it should be. Bought and installed new spark plugs, fells like a brand new car. I had someone tell me that you have to change the sparkplugs every 30k kilometers. That, I think, should also prevent additional tar collecting.

Welp learned I possibly need a fuel pump replaced on my Cabrio haha thanks for the info!

Awesome video... I do have a follow-up question. Could indexing the spark plugs have a positive impact during this process?

Another good use for AutoTempest.com is to look at other cars comparable to yours to get a price idea for a car you are selling.

A mechanic that would build engines for Dale Ernheart said in a forum about Marvel Mystery Oil . ALWAYS use 4 oz's per 10 gallons with a new motor ....it creates a dry lubricant on the walls. I have used the product for 6 years as my uncle was a mechanic that used it growing up and in the arctic instead of a blow torch. He added it to the crank and gas tank fuel and -20-40 was no longer a problem. Raises compression in tests about 10 to 15 %.

This has explained so many of my car's issues! If it lives long enough I know what I'm doing to improve its clean running and power issues.

Awesome video Jason! Keep them coming!

awesome to see 2160p

Yes. Been looking for this info. You are the only one that actually explained me what's happening to my engine and why.

another common cause for ignition timing issues, as well as valve timing issues in older engines, (both of which cause power loss) is a worn or stretched timing chain.

What about used camshafts? I have 20 yo car and it's camshaft is lower obout 2mm than a new one, what makes 15-20% loss of hight.

How do you feel about extended oil change intervals using something like Amsoil and a better filter?

Excellent video, right to the point, simple and informative. Thank you.

If you haven't yet, please do a vid on the differences between motorcycle and car engines! Oh, and the crankless Rajan engine would be pretty interesting too! Not sure if you've heard of it as it's not a popular design and its inception was around the early 20th century. It seems pretty efficient though.

Thanks for this video, i'm learning so much about engines :)

#8 especially with direct injection engines... sad panda 🐼

I'm a Sunday driver kinda guy I don't like speeding until necessary I noticed that my car was not getting up a steep hill and kept shutting down so this video helped me

Great Video Format I like the board with visuals

Just admiring your craft beer sticker wall, man. Well done! Great video too!

This video is literaly perfect

Automotive performance boils down to one word... MAINTENANCE. Every part and component has a service life and is prone to wearing out. Neglect the preventive maintenance, the check engine light, and the loss of performance your vehicle won't work for long.

We are learning from you .Thank you very much 👍

U now using Mac?? Also missing build videos of ur s2k

I acknowledge that all cars are different, but can I get an idea of about how many miles you can go before you need to start worrying about some of these issues?? I have a 2011 WRX with 71,000 miles by the way.

Very Helpful Tips! Thanks EE!!

Can you work on. my S600? You really elucidate car mechanics! I learned a lot!