What Causes Low Boost? How Does A Turbocharger System Work?
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- Опубликовано: 10 окт 2016
- A Diesel Engine relies on a Turbocharger to efficiently make power. If your engine has low boost or a bad Turbocharger, that can lead to low power, slow acceleration, and poor fuel economy. This video goes into detail about how to properly inspect, troubleshoot, and repair a Diesel Engine Turbocharger system. @AdeptApe on Venmo or AdeptApe@yahoo.com on PayPal for donations, thank you so much for supporting the channel!
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I just cant thank you enough for your excellent videos. I am diesel engine mechanic but with no deep knowledge of Caterpillar but since watch your videos, my knowledge has improved tremendously that my confidence has been restored. Once again, thanks a million
I’m a newb trying to navigate the fundamentals of turbo charging, and this is hugely helpful. Thanks for sharing your knowledge here - I didn’t even know what a waste gate was two hours ago.
Thank-You for sharing Your advise, I will seriously consider this when I’m rebuilding the engine for my 49’ International.
I’m glad I came across this old video. This may save me thousands of dollars on a turbocharger replacement on my box truck if I get a second opinion from a different mechanic. Thanks for sharing.
This is the Chanel I’ve been waiting for ! Great job
Hope you get rich from this
You are one of the best teachers on RUclips! Thank you!
You are a excellent explainer or teacher specialist on cats I’m always interested on all your videos since we all learned a lot from you thanks for your support 👍
Brilliant. Very well delivered, great pace.
Great lesson the more i replay and watch the more i get it thank you
This Man knows his theory of how engines work and and he knows what makes it work he’s very detail to the dime I wish he lived close to me in GA.
Well done explanation of the turbo system.
+wysetech2000 Thank you.
I'm SO impressed! I feel like you got a PhD in mechanics; for sure!
aprendi como diagnosticar el sistema. te agradezco esto. con esto voy a arreglar un problema intermitente de sobrepresion baja en el sistema de un vw tiguan. gracias. tu video sera bien aprovechado por que enseñare a mis auxiliares para que sean competentes. tu estas haciendo gente competente. eres muy valioso. éxito.
Excellent video and very well presented. New subscriber to your channel but truly enjoy it Thanks much❤️️
Thanks to this man i find too many problems in my trucks that help me to save to much momey because the mechanics said other parts are the problem and i dont like spend my money like that..😉
Thanks so much for such an informative video. Although I was told the noise was an exhaust manifold leak, after putting in new gaskets and putting the bedroom back together (it’s a motorhome) I can still hear a noise.
I now feel like I know everything I need to check. Hopefully I find the problem. 🤞🏻🤞🏻
When i got my little big truck the turbo wasnt spinning right. Was only doing anything at the very end of the rpm range. I didnt know there was a problem because i didnt have experience with the motor. Just figured thats how it was because it has no wastegate. I figured out it was coked up or whatever and wasnt allowing the compressor to spin freely untill i changed the oil, filters, etc and started driving it hard and then all a sudden the turbo spools ALOT quicker and builds longer. Amazing what basic maintanance can do. The truck sat for years. I use Delo 400 SDK oil, nothing fancy.
Josh what a great video. Have been watching your videos for a long time missed this one. My 2000 non egr ISX has a horrible lag and crap boost. Now i know what to check. Thanks
Really good informative video, thanks.
You gotta natural humour. Really good teacher dude
I am binge watching from amritsar punjab india. This guy is mad max's mechanic.
Thank you for the information
Excellent explanation! Thanks 😊
Awesome video very informative
Had a friend come to me to diagnose his dt466 powered international box truck. 4 shops and several thousand later his issue was resolved with replacing clamps on charge air cooler. Took me half an hour all I took as payment was a 12 pack off Coors. I think I made a future customer once in done with school!
great content and learn a ton. Thank you for taking time and put out great video
Awesome video has helped me understand turbos and boost and will help me in the future for sure
Helped me a bit in 2021,thank u sir
Great channel! Very informative! Need more channels like this
Lo boost also caused by melted fins on the exhaust turbine; my pyrometer thermocouple was failing and giving low readings when pulling my travel trailer and soon boost was down 1/2. GMC 6.5 with Banks Sidewinder (and a Banks pyrometer I might add.)
Ok thanks so much your video helped allot
Thanks lots .
Cool ℹ learn a lot today
great video by the way
Greetings Adept Ape. I hope you and yours are safe and well. I'm sure you get a lot of questions so I'll keep this short. Rest assured many dozens of hours have been spent trying to diagnose what can only be referred to as inconsistent timing on my 1985 (january build) so early 7FB series 3406b. I know it sounds crazy but bare with me. Have you ever heard of losing the thrust washer behind the idler or bull gear in the front timing gears? BTW the ATA was checked and the weld to account for slippage is intact and well done. It's been over a year and already cost me an inframe. Thank you for your time. Drew McEwan subscriber and avid follower, Whistler BC Canada
I've seen some turbos with electronically controlled wastegates and turbos with external wastegates.
so i bought a 04 vw passat with a 1.8t and its check engin light was on after buying i took it to autozone to check the codes and i got p0299 saying my turbo is underbossted and the a ase tech recommends replacing my turbo wastegate solenoid also code po420 and code p0441 where thrown catalyst system below threshold and evaporative emissions system incorrect purg flow because i have a bad exhaust leak so my question is do you think that the problem it my solenoid or could it be something else and also is there anyway this problem could relate to the exhaust leak please help me
If the boost pressure sensor and temperature sensors not working correctly that's also reason for a sluggish pick up.I'm faced that problem in ashok leyland bs3 edc engine.
Very much enjoy your videos ! Two questions : does it harm a C15 to pre fill fuel filters with a diesel additive such as lucas, Howes ,etc. and will it harm a C15 to remove the engine block insulation? Thank you
best of the best work.
Thank you cat master.
Thanks for this video. Yesterday when driving into Colorado Springs, I started have a a delayed acceleration each time at a traffic light, then it gets going. What would be your first thought for that? It seems fine after. On highway, boost pressure is always 20's to 30's. I never looked around town. Driving to campsite in town, it would go down to very low numbers. I assume this is normal?
I love the videos keep them up
Hello, I would like to know what is the turbo actuator spects are as far as bsi boost . (At what pressure the gate should starts to open up ? Thanks
Very helpful and nice 👍
Thanks for showing telling,you’re helping me a lot thanks and well see ya next time see ya bye.
Thanks for sharing your knowledge!! I have a question, this is on a 2003 c12, I am seeing a oil leak around the oil cooler dripping on the ground but I can't see where it is exactly coming from. Any ideas?
Hey man after some advice or some problem shooting techniques for Australias barra turbo motor? I'm hoping if I tell u symptoms u may know what it is
hey man i subscribed a couple of weeks ago good channel thanks for all the info it helps out. I'm in school right now to become a diesel tech should be graduating here in December and your channel helps me out learn things not taught in my class or in lab. keep it up.
+gabriel garcia Thank you for the support. I always like hearing that people learn things from my videos. I get a lot of messages from people in Diesel programs. Thanks for subbing.
Can u tell me about how to reduce the back pressure in DOC,POC exhaust systems?
How do I know if my boost gauge is working its always been at 0 at I got truck turned up to 550 but it ain't pushing out 550
I have a cat 15 and have boost issues. Sometimes it works perfect but once I hit a hill boost cuts out and usually won’t return. First thing in morning it works good, once truck has been running for awhile it’ll stop working again
in each single video you upload there is new great knowledge ,many thanks to share your experience, god bless you save you and keep you,
The APE stands for AUTOMOTIVE. PROFESSIONAL ENGINEER?? ..GREAT VIDEOS
Great Video, Have a question Have a G3306TA boost pressure after the wast gate is 4 psig it goes through the carburetor at 4 goes into after cooler at 4 but comes out of new after cooler at 1 psig. Is this Normal drop.
Adept Ape, I have a C15, twin turbo setup that has a plugged DPF, the driver says he's not getting any boost, so I'm guessing it's because the DPF is plugged. Anyway, when he shuts the truck off, you can hear one of the turbos still spinning for about 1-2 minutes, why would a turbo keep spinning? Do I need to replace it?
My boost problem was bad electronic boost actuator had me seeking for days 2010 sprinter
What was your issue man I’m having 9and 10th gear with no boost at maxing out those two gears
Excellent video bro.
New subscriber here!
Great vid,are u in Massachusetts by any chance?my has a code P2562 turbocharger boost control position sensor circuit.
on a generator set do they use a smaller turbo for the steady 1800 rpm? i’m trying to figure out how they achieve 30-35 lbs at less load/rpm
I want to turbo my Vw sand rail. What is a low cost small turbo that will run independent of the engine ie no computer or vacuum hoses? Thanks great video.
Binge Watching even though I drive freightliner love the info
I drive a Freightliner, it has a 3406e CAT. Cat engines were put in all brands of trucks.
I noticed in the draw diagram you have shows 0-30 psi. I had no idea cat turbos and engines had great power to lower psi.
My first truck has an Cummins isx 13 and the boost would go to 50 psi every time i climbed hills. It had a vgt turbo.
Do you got anything on a BSXC 15 for secondary timing sensor even after an ECM and harness
Hi buddy, great vids, i have a focus 2010 1.6 tdci 109hp and i have the p0299 code coming up. I changed the solenoid boost control valve and the egr valve as i had a stick open egr code as well. Not solved. It’s strange as if I accelerate to the floor in 2 nd, 3rd, 4th, 5th from under 2000 rpm the turbo will do full boost, about 1.1 bar and hold constantly until i shift into next gear at 3-4000 rpm, i have a boost gauge; if i try accelerating from 2000 rpm or higher the boost goes to 0.5 0.6 and if i keep my foot in it will go into limp mode. No sensor codes or other codes come up, i hear no sounds of air escaping anywhere. Any idea what can cause this? Mechanics are baffled also. Thanks for the help
Hey man thanks for this nice video i have problem with my bmw n54 my car running well at the begining after like 5 minit i have check engine light it’s flushing on my dash and stop my twin turbo when the light came on the car it’s on leap mood and show code 3100 boost presure leak and i have wastegate sound
Thanks for the video! Just to help my understand of turbocharged diesels, what would happen if there was an older 1999/2000 Cat 3126 (no electronics) running properly under load (constant) and something stopped the outside airflow through the CAC, such as a large piece of debris like a garbage bag, etc. and the driver continued to operate the vehicle. The air coming to the intake manifold would get pretty hot. Would the engine lose a noticeable amount of power and overheat? Would there likely be heat damage to the head/valve assembly or pistons/rings? Thanks again. We really appreciate you.
If the hose that goes to the turbo to the waste gate comes off will it then lose boost or will the boost go up very high like on the fast & furious like when Dom pulled the hose off with a piece of wire???????
Hey man i have c15 pete 389 and i work in the end dump insdutry I've noticed that the truck does the first couple of loads just fine but after a while running i feel real hard acceleration to the point where my foot hurts from pressing on the pedal any ideas?
I recently bought and old Ford tandem dump and it has an old mechanical 3208 and I heard a lot about them throwing rods do you know of the problem and have you come across it
Josh: I am a CAT Specialist
Me: And a darn good CAT Specialist at that.
Wish I had a Josh at my CAT dealership….I’ll take 3 Josh’s’ please thank you 👊🏾
Great video. I have a low turbo boost problem on my truck. I had hoses changed, boost sensor changed and cac changed and still have low boost
+Antoin Zachery Have your tried pinching the wastegate and driving it to see if that fixes it? Any other engine problems like low fuel pressure or smoke? You can check the exhaust for back pressure that can cause low boost as well.
No low fuel pressure and no smoke. I like to check the intake manifold for leaks. I spent so much money trying to get my turbo fixed. I taken it to different shops but keep getting different answers. I just want on direct answer why my turbo is producing such low boost. You have a shop near Cincinnati, Ohio?
+Adept Ape I meant I want a direct answer from a shop who is looking at my turbo. In a way I feel the shops I was taking the truck to were guessing the problem.
+Antoin Zachery No sir, the shop is on the West Coast.
+Antoin Zachery Well when you have several components changed and didn't fix the problem, they sure sound like they are guessing.
We got a machine with a CAT C9 acert and in summer time always overheat. Can you tell me what's wrong with it?
awesome video man! learned a lot
What would cause no communication to turbo on a 2019 Mack granite? I’ve looked at both fuse boxes and check wires and currently at a loss on what’s causing the issues.
How much boost should I be getting with a 1998 3126B? I'm only getting around 18 psi at most. Normally it's only at like 10~15psi.
I got a 14 l Detroit. How to test to see if the actuator is stuck. I’m getting moaning sound when let off the accelator like it’s building too much pressure. Should I be able to move the rod up and down by hand or when does it move on it’s own at idle?
Okay cac tested holding 30 psi.. exhaust manifold gaskets replaced turbos inspected but only get 32 pounds of pressure also power on grades is down.. I heard it could be my Iva’s or harness going bad any ideals
Hi , you say that if you pinch the wastegate actuator hose and then run the truck and then your boost returns, then that means your actuator is bad...but i thought the actuator being actuated opens the waste gate port to decrease boost pressure by bypassing the turbine. Im trying to diagnose a 3126b that turns on and idles flawlessly, but after it warms up a little it then goes into an unbalanced idle state. Boost pressure only reaches 8psi at wide open throttle while driving , and 7psi at wide open throttle on neutral.
I've seen excessive valve lash cause low boost. basically all the engine and components are is a big ass air pump. if you're working on a machine check the precleaner too. I've seen the venturi in the precleaner get damaged or plugged and cause no chooch. ("chooch" being powah.)
How can you isolate where the leak may be? Could I spray ether onto the hoses , cac and such? like I would in a gasoline engine to find leaks in the intake system?
Adept Ape!!! Please help me out with a low boost problem. The engine is a year 2000 model C12. I have two important question, when disconnecting the power boost sensor and checking volt and ground coming from the ECM, i am getting ground, 4.9 volts and the signal wire is reading 6.2 V. Is this correct?
Now when I connect the plug and turn on the truck I am getting signal back at 1.4 and it doesnt change even though I accelerate all the way down, truck parked. Only getting 1 psi boost max 4 psi with the peddle at 100 percent!
I have a 2014 Transit connect 1.6 l EcoBoost with turbo I notice when I floor it going uphill or incline my car feels like it pulsates. Like it's trying to push forward. Transmission is fine do you think it could be a turbo issue?
Hey Josh can you tell me what my boost pressure should be on a 07 MXS 475 still with the twins I put a mechanical guage in it and also the needle is VERY jumpy
Is that normal?
Hi I have an Mitsubishi 4m40 efi engine that boosts fine at 20psi but when the fuel is turned up it starts jerking and surging and my boost gauge needle goes crazy?? Restrictive intercooler (cac) ? Restricted exhaust??
Can you make a video on converting a cat c15 mxs to a single turbo? Please
I have a backhoe 420 F it i would like you to see a video I wanna now if the turbo is good
Hello friend, I have a 2018 Ram 2500 with the code P0299 turbo under boost, I already changed filters, checked the variable geometry turbo and it slides well. I replaced my boost sensor but the pressure is 0.08 to 0.12 psi but it should read 2.5 psi. Would it be a matter of checking the intercooler?
Can I adjust the wastegate on a 3406e for more boost. Only getting about 17 psi at 1400 rpm and the power just dies off even going over an overpass
Good morning. I have a freightliner box truck with a CAT engine. It blew the CAC tube off of the turbo. Assuming it wasn't a loose or rusted clamp, what could cause this to happen? I had some ac work done at a shop. I'm wondering if they removed the tube to better access the ac lines passing under the tube and didn't tighten the clamp. Hopefully it's that simple.
I have a c13 issue when cold. Engine stumbles, lots of smoke, and a fluttering sound. I can back off the throttle a little and it goes away. No issue when it seems coolant and oil up to temp. Injectors were replaced, running 75 psi fuel pressure at idle between 80-90 driving down road. Could wastegate cause this?
I have a question on a 3306. I rebuilt this 3306, had oil coming out of exhaust side of turbo and out of cylinder 2 exhaust port. Pulled the head back off, replaced piston, rings and liner on that cylinder. STILL have EXCESSIVE oil coming out of exhaust housing of the turbo. Could that be bad oil seals in turbo? It’s almost instantly after starting engine the oil coming out of exhaust housing
Mercedes C200 CGI. I have miss fire at cylinder no2 while driving even at low speed.
Noticed that my turbo BOV open and does not close.
Already replace BOV, pressure sensor, waste gate control vacuum,
temp. sensor yet to replace and reads 50 deg Celcius when idling.
When pressure sensor connector removed BOV closed and no more miss fire even at 120KM/h speed. Any advise. Can we drive the car with BOV continously closed
what about sensors? barometric pressure sensor and turbo boost sensor can give you a low boost or no boost at all as well
i have a c32 engine on 1000kva genset. while the engine run on idle condition there's no black smoke but on 50 percent load the engine exhaust black smoke continuously. Also the boost pressure doesn't change. Will there be any chance of leakage in CAC or something else
Hey my man, what is the normal boost pressure in a c15 acert twin turbo.
Thanks
I got a 3406b 7fb prefix motor. It only builds 10 psi of boost. The truck had another 7fb engine in it that broke some piston rings. That old motor had 28 psi of boost but it was turned up. The new motor only has 10 psi of boost. When I bought the motor I was told it wasn't turned up any. How much boost should that engine build set at factory? Its air cooled.
Man you help me so bad to diagnost my bad wastegate. My turbo was creating 5psi of boost instead of 25psi and i did youre trick pinching the wastegate hose and try to see if it creates boost and it did create boost so my turbo is ok. Took the visgrip off the vacuum hose that leads to wastegate and did a pull and only made 5psi of boost so wastegate is not holding pressure
I have a 3406B in a 93 Kenworth T800 dump truck and when I’m loaded and going up a grade it won’t boost past 15psi I’ve replaced all the intercooler boots and the AFC diafram on the backside of the injection pump. Any ideas?
I need help. I have a 2004 c12 mBL11904 low boost . I have 5 lbs under a pull it set a boost sensor code originally. Put on a sensor on part#1611705.cleared the codes replaced CAC asst which had a 3 inch crack replaced air and fuel filters. It runs 90 psi fuel pressure under a pull and 65 psi at low idle. I checked turbo and wastegate movement no diaphragm holes or stuck valve fins look good on both ends. Ran it with exhaust disconnected from turbo no difference. Only thing I found is primer pump doesn’t work. Have not replaced it yet. Sprayed down intake and tubes and no leaks. Any suggestions?
so i bought a 04 vw passat with a 1.8t and its check engin light was on after buying i took it to autozone to check the codes and i got p0299 saying my turbo is underbossted and the a ase tech recommends replacing my turbo wastegate solenoid also code po420 and code p0441 where thrown catalyst system below threshold and evaporative emissions system incorrect purg flow because i have a bad exhaust leak so my question is do you think that the problem it my solenoid or could it be something else and also is there anyway this problem could relate to the exhaust leak please help me