Carbon Buildup = Fuel Injection Flush??? - Toyota Yaris Forums

zfarsh · 10-21-2011, 01:52 PM

ok, thanks guys. One thing i forgot to mention is that is it automatic transmission. I am a bit confused about all this, as there are different answers.

However, I am guessing the Brake Fluid might not be bad because of the ABS (but it is not in the maintenance manual, so i wasnt 100% sure, and I am a newb). Still waiting to hear more responses. Now, it looked complicated doing it myself from what i have seen in pictures / videos, but will relook at that and see if i can find it for a yaris. Anyways, the 100$ brake fluid is not that huge.

However, what is huge is the Fluid Injector Flush and the Throtling Body Service. They say there is carbon buildup and it is recommended i flush these out and do the maintenance at 89,000 km. I know Jambo101 said i dont need it. Would like to hear a bit more on this subject, and why i dont need or why do i need it. What is this issue anyways. Again, I have never started using additives yet to my fuel (some say it is good, others say it is bad), and dont know if this will remove the carbon build-up, and i dont even know if carbon build-up is serious and needs to be addressed quickly. Again, would appreciate your thoughts and detailed reasoning. Has anybody been told this by the dealer / mecahnic before?

CTScott · 10-21-2011, 02:48 PM

Quote:

Originally Posted by zfarsh

ok, thanks guys. One thing i forgot to mention is that is it automatic transmission. I am a bit confused about all this, as there are different answers.

However, I am guessing the Brake Fluid might not be bad because of the ABS (but it is not in the maintenance manual, so i wasnt 100% sure, and I am a newb). Still waiting to hear more responses. Now, it looked complicated doing it myself from what i have seen in pictures / videos, but will relook at that and see if i can find it for a yaris. Anyways, the 100$ brake fluid is not that huge.

However, what is huge is the Fluid Injector Flush and the Throtling Body Service. They say there is carbon buildup and it is recommended i flush these out and do the maintenance at 89,000 km. I know Jambo101 said i dont need it. Would like to hear a bit more on this subject, and why i dont need or why do i need it. What is this issue anyways. Again, I have never started using additives yet to my fuel (some say it is good, others say it is bad), and dont know if this will remove the carbon build-up, and i dont even know if carbon build-up is serious and needs to be addressed quickly. Again, would appreciate your thoughts and detailed reasoning. Has anybody been told this by the dealer / mecahnic before?

The fuel injector and throttle body cleaning are really likely to not be needed. If the throttle body had significant carbon deposits you would notice the engine running a bit rough. The same basically goes for the injectors.

Don't let them talk you into doing a fluid change on the automatic transmission either, unless it is on their nickel.

Things like these are how the dealer makes serious money on service. After my father retired from his engineering career, a friend of his that owned a car dealership convinced him to be the service manager. My father went back into retirement in less than a year because he refused to "play the game" of constantly trying to sell people services that their cars didn't need.

zfarsh · 10-21-2011, 03:38 PM

Hi CTScott, thanks for the response, just curious what you meant by the following:

"Don't let them talk you into doing a fluid change on the automatic transmission either, unless it is on their nickel. "

Do you mean the Transmission Fluid Flush? If so, i was on the impression that this required to be changed at around 100,000 km as per the manual, for a automatic transmission car. Isnt the life time for that fluid about 100k? Pls let me know as i was going to get that done at my next oil change visit in 8,000 km.

CTScott · 10-21-2011, 03:51 PM

Quote:

Originally Posted by zfarsh

Hi CTScott, thanks for the response, just curious what you meant by the following:

"Don't let them talk you into doing a fluid change on the automatic transmission either, unless it is on their nickel. "

Do you mean the Transmission Fluid Flush? If so, i was on the impression that this required to be changed at around 100,000 km as per the manual, for a automatic transmission car. Isnt the life time for that fluid about 100k? Pls let me know as i was going to get that done at my next oil change visit in 8,000 km.

In the US service booklet that came with my 09, AT fluid is only inspected, not changed. The Toyota AT WS fluid is intended to be a "lifetime" fluid. It is probably not a bad idea to go ahead and change it around 100k miles, but 100k km is really early.

A-Dingo-Ate-My-Baby · 10-21-2011, 03:55 PM

Quote:

Originally Posted by CTScott

The fuel injector and throttle body cleaning are really likely to not be needed. If the throttle body had significant carbon deposits you would notice the engine running a bit rough. The same basically goes for the injectors.

Don't let them talk you into doing a fluid change on the automatic transmission either, unless it is on their nickel.

Things like these are how the dealer makes serious money on service. After my father retired from his engineering career, a friend of his that owned a car dealership convinced him to be the service manager. My father went back into retirement in less than a year because he refused to "play the game" of constantly trying to sell people services that their cars didn't need.

know what ?

how does it run now ?

obtain 2 bottles of either Chevron Techron, or BG44K, (--no other brands or types !!--) and run 2 tanks of gas through the Yaris, one bottle a tank.

make at least some 50 mile trips on those runs...

does the Yaris run better ? it should run a bit smoother.

zfarsh · 10-21-2011, 04:41 PM

CTScott: Oh wow, i thought it was supposed to be changed at 100,000 km, not 100k miles!!! that is a huge difference. I see i have the wrong maintenance menu, for a Toyota 2006 Yaris, not a Toyota 2009, so I will have to find it for that. However, the Toyota Service center has however provided their schudule for Yaris 2009, and it says that at 96,000 km, i should replace the Automatic Transmission Fluid. I may have to start calling a couple of Toyota Service Centers to get this cleared up. The second change of transmission oil is indicated at 192,000 km.... I am wandering if we are getting screwed in Canada with the numbers.

A-Dino-Eat-My-Baby: : Thanks. Ok, so how does it work. Fill up one bottle for a filled tank. Do about 50 miles or more, then put another bottle, or wait for tank to be half full, fill it up, then add the second bottle? Not sure when to use second bottle.

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10-21-2011, 01:52 PM	#1
zfarsh Drives: Yaris Sedan 2009 Automatic Join Date: Oct 2011 Location: Oakville, Canada Posts: 12	ok, thanks guys. One thing i forgot to mention is that is it automatic transmission. I am a bit confused about all this, as there are different answers. However, I am guessing the Brake Fluid might not be bad because of the ABS (but it is not in the maintenance manual, so i wasnt 100% sure, and I am a newb). Still waiting to hear more responses. Now, it looked complicated doing it myself from what i have seen in pictures / videos, but will relook at that and see if i can find it for a yaris. Anyways, the 100$ brake fluid is not that huge. However, what is huge is the Fluid Injector Flush and the Throtling Body Service. They say there is carbon buildup and it is recommended i flush these out and do the maintenance at 89,000 km. I know Jambo101 said i dont need it. Would like to hear a bit more on this subject, and why i dont need or why do i need it. What is this issue anyways. Again, I have never started using additives yet to my fuel (some say it is good, others say it is bad), and dont know if this will remove the carbon build-up, and i dont even know if carbon build-up is serious and needs to be addressed quickly. Again, would appreciate your thoughts and detailed reasoning. Has anybody been told this by the dealer / mecahnic before?

10-21-2011, 03:38 PM	#3
zfarsh Drives: Yaris Sedan 2009 Automatic Join Date: Oct 2011 Location: Oakville, Canada Posts: 12	Hi CTScott, thanks for the response, just curious what you meant by the following: "Don't let them talk you into doing a fluid change on the automatic transmission either, unless it is on their nickel. " Do you mean the Transmission Fluid Flush? If so, i was on the impression that this required to be changed at around 100,000 km as per the manual, for a automatic transmission car. Isnt the life time for that fluid about 100k? Pls let me know as i was going to get that done at my next oil change visit in 8,000 km.

10-21-2011, 04:41 PM	#6
zfarsh Drives: Yaris Sedan 2009 Automatic Join Date: Oct 2011 Location: Oakville, Canada Posts: 12	CTScott: Oh wow, i thought it was supposed to be changed at 100,000 km, not 100k miles!!! that is a huge difference. I see i have the wrong maintenance menu, for a Toyota 2006 Yaris, not a Toyota 2009, so I will have to find it for that. However, the Toyota Service center has however provided their schudule for Yaris 2009, and it says that at 96,000 km, i should replace the Automatic Transmission Fluid. I may have to start calling a couple of Toyota Service Centers to get this cleared up. The second change of transmission oil is indicated at 192,000 km.... I am wandering if we are getting screwed in Canada with the numbers. A-Dino-Eat-My-Baby: : Thanks. Ok, so how does it work. Fill up one bottle for a filled tank. Do about 50 miles or more, then put another bottle, or wait for tank to be half full, fill it up, then add the second bottle? Not sure when to use second bottle.