When an engine is shut off, there are often one or more intake valves open and the residual fuel vapors as well as oil vapors from the PCV system are trapped behind the throttle plate until the next startup. There will always be a buildup in that area. I always recommend to have the throttle body cleaned every couple years.
I came here for this comment. I 100% agree. I have always (decades) seen this buildup on the inside of the intake manifold beyond the throttle body, mostly from PCV valve activity. Oil vapor lands on cool surfaces after the car cools down. It's simple. Never had a fuel pressure regulator problem.
Noticed this on my motorcycle. I change the oil, flush the gas tank, and clean the air box religiously to prevent corrosion and shit, but this gunk always builds up in the air filter housing around the vapor return lines. The manufacturer even put a tiny little sponge in there to collect it all between cleanings
Yes but will maybe appear as a lighter color than from the motor and pcv still is letting out the fuel that can leak past worn rings into the crankcase obviously like the whole point of the pcv right? Weil not the whole point but whether it's fuel or blowby gases from cylinders? Because otherwise they will go into oil and thin the oil and that's part or the reason as well as.... carbon buildup?
@anorsegoddess9797 don't forget that if you disconnect the battery fir any reason you may have to take the vehicle through a fuel trim relearn process... otherwise it'll idle like shit and may even stall out
My 2011 Honda Accord had the same problem and I had a mechanic that wanted to replace the valves. I wanted to make sure of his diagnosis so I want to friend that my son uses and after going through the core he noticed under the body throttle there was a lot of wires coming out the wiring corners and he noticed one of the wires were broken, so he put two wires together fix the wire which was thin thread wire when you’re sewing and I got a bill from him for over $300 for the job. The other person wanted $900 and that was an even the problem so I would suggest getting a couple opinions if you can if your car will let you, don’t jump on the first opinion
Most likely the purge valve right next to the throttle body that's going bad. If you have an issue with starting after filling your tank that's another indicator that your purge valve is bad.
that's probably oil from the engine because the air that comes out from the engine and goes to the air system has oil in it that's why some people install oil catch can
I open mine like that it squirts about 30cc of fuel straight down the intake manifold! But it's hard to even see it because there's a choke plate in the way...and a venturi...
@@roballan4944 Pretty sure a fella what knows the exact volume of their accelerator pump might just know what they have on their engine.......hell they may even have put a kit or two in it over the fifteen years they've been driving it? Just a thought or two.....
Oof 😬 Every time you plunge your finger in the valve or just drop it, i cringe. Rapidly moving the butterfly valve can actually cause enough current to send faulty signals and mess up sensitive electronic components. If I need to move the butterfly valve to clean the throttle body, I move it slowly so as to not generate current
I’ve got an issue with my 94 Chevy 4.3 Silverado when accelerating is very slow the engine definitely sounds like it’s working but it gets up to speed weakly and at around 40mph the engine shakes bad and it’s not motor mounts I’ve looked at everything
Don't ever put your fingers or hands near one of these without it unplugged. Bad things can happen. Stepping motors are no joke. Best to remove and examine.
Could also be bad intake valve/valves not seating and piston blowing air charge back through intake. Put hand over throttle body and if you feel any pressure popping back at your hand it's a bad intake valve seat, if not it's probably one of the other problems also mentioned above.
That would be the APPS (Accelerator Pedal Position Sensor). Around $45-50 on Rock Auto. The TPS (Throttle Position Sensor) is in the actual Throttle Body and cannot be separated. You have to order the whole enchilada. About $120-250 pending how much cheddar you’ve got to burn. Good luck!
That is oil. 5.3 Chevy engines all have oil leaking into the throttle body. They sell an updated valve cover (genuine GM) that helps stop it, and you can add a good Micky Mouse oil catcher. Also. It is really not much of a problem. I ran one to 300,000 miles with no problems doing that.
If u have a electric throttle body do not opn it like that !! Like he’s doing. If it’s cable it’s okay to do that but not electric!! It could break or need a relearn smh
I have a 2012 Chevy Impala. I was driving it and it shut off and I was smelling gas underneath the hood but I pulled the oil stick out it had gas on it. Anybody help me out with this problem
I had this before and it was the high pressure fuel pump leaking to the engine. If Im not wrong it could also be bad injectors but with that the car keeps running after you shut it off for few seconds.
Yea ive got greasy oily gas kinda smelling shit behind mine. But its throwing small vaccume leak codes and wont idle normally unless im giving it some pedal. 2002 dodge dakota 4.7
I sprayed mine with a bunch of cleaner. Is that a good idea or not??? I'm wondering if that's my problem, the feul pressure regulator. Are they expensive??
@@5.7_Angelafter cleaning the throttle, your RPMs will often be a little wonky as there's more airflow (cleaning removes the carbon buildup.) Might take a few drivers for your ECU to relearn and readjust the idle
got an '03 ford ranger and i have this exact thing on my 4.0 i had to replace the idle air control valve in order to pass emissions smog test and when i was in there i noticed a strong smell of gasoline so im gonna start with that regulator and see if it helps thanks!
When an engine is shut off, there are often one or more intake valves open and the residual fuel vapors as well as oil vapors from the PCV system are trapped behind the throttle plate until the next startup. There will always be a buildup in that area. I always recommend to have the throttle body cleaned every couple years.
🤔
I came here for this comment. I 100% agree. I have always (decades) seen this buildup on the inside of the intake manifold beyond the throttle body, mostly from PCV valve activity. Oil vapor lands on cool surfaces after the car cools down. It's simple. Never had a fuel pressure regulator problem.
@@InexplicableBillthis person is correct.
Noticed this on my motorcycle. I change the oil, flush the gas tank, and clean the air box religiously to prevent corrosion and shit, but this gunk always builds up in the air filter housing around the vapor return lines. The manufacturer even put a tiny little sponge in there to collect it all between cleanings
You just damaged that throttle body, ,you not supposed to open that manually,
It can also be the pcv valve that needs to be replaced.
Hey i suspect if pcv valve is faulty there will be OIL int eh throtle door itself since the pcv vavle connects before the door😅
Yes but will maybe appear as a lighter color than from the motor and pcv still is letting out the fuel that can leak past worn rings into the crankcase obviously like the whole point of the pcv right? Weil not the whole point but whether it's fuel or blowby gases from cylinders? Because otherwise they will go into oil and thin the oil and that's part or the reason as well as.... carbon buildup?
A good pcv valve will shake
Mine is good and just replaced it. Having major idle issues
@anorsegoddess9797 don't forget that if you disconnect the battery fir any reason you may have to take the vehicle through a fuel trim relearn process... otherwise it'll idle like shit and may even stall out
My 2011 Honda Accord had the same problem and I had a mechanic that wanted to replace the valves. I wanted to make sure of his diagnosis so I want to friend that my son uses and after going through the core he noticed under the body throttle there was a lot of wires coming out the wiring corners and he noticed one of the wires were broken, so he put two wires together fix the wire which was thin thread wire when you’re sewing and I got a bill from him for over $300 for the job. The other person wanted $900 and that was an even the problem so I would suggest getting a couple opinions if you can if your car will let you, don’t jump on the first opinion
Some throtles can break by manually opening them. Have a buddy press the gas pedal
#nissan
@@ItchyKneeSon lol did that on my z☠️
With the engine running
I was just about to say that bro great minds think alike
Not on the ride by wire ones
Most likely the purge valve right next to the throttle body that's going bad. If you have an issue with starting after filling your tank that's another indicator that your purge valve is bad.
Emission systems also need addressing.
If it smells fishy. It’s most likely a blown head gasket. It’s very common with cars that have too many miles
Or you use it to fish from.
My boy that’s not a problem with this truck it’s A FORD FUCKIN RANGER 😂
That’s what she said
It’s probably a Ford. They make the best car commercials 😂😂😂
This comment hit home. Currently replacing this on my escape 😂
@@rubydad8127be careful if u have a newer escape they are trash like complete garbage those new motors from for are the worst
This is normal, it's why some vehicles have a charcoal filter inside the intake box so that the fuel vapors don't escape
No it’s not. It’s from the PCV system it’s why man created the catch can.
that's probably oil from the engine because the air that comes out from the engine and goes to the air system has oil in it that's why some people install oil catch can
Exactly. Especially if you are modified it would be a lot more.
But he said if it smells like gas not oil
it is oil, this guy is an idiot lol. its very common on nissan engines that have PVC and blow oil out of the valve covers back into the intake.
From PCV tubing?
@@HeyShockerGirl it's air mixed with engine oil and gaz or diesel
I open mine like that it squirts about 30cc of fuel straight down the intake manifold! But it's hard to even see it because there's a choke plate in the way...and a venturi...
that's a carburetor
@@roballan4944 Pretty sure a fella what knows the exact volume of their accelerator pump might just know what they have on their engine.......hell they may even have put a kit or two in it over the fifteen years they've been driving it? Just a thought or two.....
@@TestECull Anyway, I believe you have a carburated engine.
@@roballan4944ya think?
Oof 😬 Every time you plunge your finger in the valve or just drop it, i cringe. Rapidly moving the butterfly valve can actually cause enough current to send faulty signals and mess up sensitive electronic components. If I need to move the butterfly valve to clean the throttle body, I move it slowly so as to not generate current
Could this happen if my 02 sensors went out recently replaced and had to clean my throttle body?
No, they shouldn’t effect this
Don’t drop be butterfly valve so hard on those electronic throttles there lots of small parts in there you don’t want to break
I’ve got an issue with my 94 Chevy 4.3 Silverado when accelerating is very slow the engine definitely sounds like it’s working but it gets up to speed weakly and at around 40mph the engine shakes bad and it’s not motor mounts I’ve looked at everything
Have you checked your fuel pressure to make sure it’s to spec?
Thank you.. can this cause a faulty 02 sensor code ?
Typically not
Have the same thing. Doesn’t really affect anything on my 2003 suburban
Touching throttle with
fingers may harm your throttle as this should be operated by electric signals.
Don't ever put your fingers or hands near one of these without it unplugged. Bad things can happen. Stepping motors are no joke. Best to remove and examine.
What's a stepping motor?
High torque motor. Can pinch or remove digits. I'd not want mine in there unless it was unplugged better yet remove it for cleaning.
Could also be bad intake valve/valves not seating and piston blowing air charge back through intake.
Put hand over throttle body and if you feel any pressure popping back at your hand it's a bad intake valve seat, if not it's probably one of the other problems also mentioned above.
Bad misfire too if valve is bent or not seated
Pls what can make throttle atuetor boy not firing
That’s afterburner!!
I have a code P0122
Throttle/Pedal Position what should I fix first the throttle body or the pedal position sensor
I would start with whichever part is cheaper. You don’t want to start with the more expensive part, just to realize that wasn’t it.
That would be the APPS (Accelerator Pedal Position Sensor). Around $45-50 on Rock Auto. The TPS (Throttle Position Sensor) is in the actual Throttle Body and cannot be separated. You have to order the whole enchilada. About $120-250 pending how much cheddar you’ve got to burn. Good luck!
That is oil. 5.3 Chevy engines all have oil leaking into the throttle body. They sell an updated valve cover (genuine GM) that helps stop it, and you can add a good Micky Mouse oil catcher.
Also. It is really not much of a problem. I ran one to 300,000 miles with no problems doing that.
Mighty Mouse*
@@jonathanblunt3779 You'd be correct, but Micky Mouse sounds cooler. 😎
@@steefan2248 so the noobs can find the best catch can on the market haha
I needed to see this comment because I’m dealing with this same issue now 😢
Mine smells like gas
I put a catch can in my truck and now it doesn’t do the super loud high rpm startup and it runs clean
I recently replaced the throttle body on my 2017 Chevy and still having the same problem. It's still showing Engine power reduced
Did you use an aftermarket one or a name brand?
@PhillipsVision it was a new throttle Body. Hitachi Brand
@@celestinocarrillo6479 I’ve used them, they’re good. Are you getting specific engine codes?
You should never open the throttle body by hand. If you need to open it turn key on engine off and then open it by jamming something on the gas pedal
Yes I was about to say the same thing it tears them up
Why is that
What if it doesn’t open when you press on the gas pedal ?
@@chrvscuts4945 then it should be replaced
That’s not true you can open the throttle body by hand and clean it
It’s also not good to open that blade while it’s plugged in and has 12v.
I have a 2013 Silverado 4.8 and it drives at 20mph but when I accelerate it revs high rpm’s and doesn’t go what does it mean
What does that cause loss of accleration
Just buy a oil catch can everyone to keep ur tbi and intake manifold clean 😁
Or your pcv system is backed up...
Where is it and how do you clean it
@@blakekoubek5031 Usually running from your valve covers that connects to a rubber or plastic tube.
What are symptoms of this that the car will do???
Performance issues, like poor acceleration and/or high or low rpm’s at idle. You will also have an engine code most of the time
😮
thats 1 possibility yes
If u have a electric throttle body do not opn it like that !! Like he’s doing. If it’s cable it’s okay to do that but not electric!! It could break or need a relearn smh
Seriously never touch drive by wire throttle body blades NEVER.
I have a 2012 Chevy Impala. I was driving it and it shut off and I was smelling gas underneath the hood but I pulled the oil stick out it had gas on it. Anybody help me out with this problem
Could be a problem with bad piston rings or leaking Injectors
I had this before and it was the high pressure fuel pump leaking to the engine. If Im not wrong it could also be bad injectors but with that the car keeps running after you shut it off for few seconds.
Me with a carburetorated engine with gas built too be there
All LS motors do that dude, put a catch can on it. Its almost impossible for fuel to travel back up the runners, its direct port SMH
Never EVER force a electric throttle body open EVER! your going to open up a can of worms doing so.
hw you get gas in the throttle body if is fuel injection?oil maybe
Bad pressure regulator can also cause that
@@PhillipsVision did you fix the problem?
Or in my case EGR pouring crud into the TB
Yea ive got greasy oily gas kinda smelling shit behind mine. But its throwing small vaccume leak codes and wont idle normally unless im giving it some pedal. 2002 dodge dakota 4.7
How to swap a idle air control valve?
don't ever open an electronic throttle body like that he better hope it reset
An electronic throttle body can be re calibrated by following steps outlined by the manufacturer.
@@PhillipsVisionI still think people should know about my comment and thank you for clearing that up and protecting the DIY
I sprayed mine with a bunch of cleaner. Is that a good idea or not??? I'm wondering if that's my problem, the feul pressure regulator. Are they expensive??
That's called nitrous
it's oil from valve case. oil fumes. clean it with throttle body cleaner
He said if it smells like gas
Is that a EFI throttle body or a port injection fuel system?
Fuel in the throttle body? Sounds like a carburetor to me
What car is that
Chevy Trailblazer EXT with 5.3L V8
What could be the causes of that
I watched the video like 5 times and I still don't smell anything
You know they could mess up the sensor when you open it
Glad you mention that because i opened mine to clean it and now im getting symptoms of a bad sensor
@@Junior-ux4gybro me too I was tryna clean my throttle body and when I started the car it started funny🥲
What is “the” sensor lmfao
@@5.7_Angelafter cleaning the throttle, your RPMs will often be a little wonky as there's more airflow (cleaning removes the carbon buildup.) Might take a few drivers for your ECU to relearn and readjust the idle
@@scottdunbar9808TPS
Not necessarily
how do i fix it
our expedition keeps shutting off on its own, my hubby cleaned the throttle body out, it’s still shutting off the vehicle
Are you getting any engine codes? Have you checked the fuel pressure?
Get a new hubby
@@dennismorgan9035 he changed it out n now there’s no problem, i’ll keep the hubby, thank you
Does the expedition have the 5.4 triton engine?
got an '03 ford ranger and i have this exact thing on my 4.0 i had to replace the idle air control valve in order to pass emissions smog test and when i was in there i noticed a strong smell of gasoline so im gonna start with that regulator and see if it helps thanks!
Did that regulator work
@@biggopppp4xkashvillekris yes
@@biggopppp4xkashvillekris yes but try to get the oem or closest to oem one, research whatever brand it is to see if people say its reliable brand
Yes sir
Watt happens to blowby
I agre!
Maybe bad valveing
Autozone do you have a throttle body ...No ok.
Prostrate?
🤣🤣🤣
Is this a ford ?
No, Kia
Its ok
Hmmmm… Sam thing happened to my gals ole thang.. it was so wet and moist in there …
Grow up.
@@jasminebranch7199 get ur mind out of the gutter .. stop being so sick and twisted.
Grow up
Grow up
The ole scratch and sniff. Yeah we all know who she is