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Re: Cleaning fuel injectors question
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CarGuru > Technology > Re: Cleaning fuel injectors question 23 January 2005 05:09:15
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Re: Cleaning fuel injectors question

AZGuy 23 January 2005 12:51:22
 On Sat, 22 Jan 2005 08:47:33 GMT, Dan Ritter <danritter@telus.ne­t>
wrote:
My engine has been running rough lately. One possibility I thought >could be the injectors. I know it could be a lot of other things. I've >heard that most injector cleaners that you add to the gas aren't all >that good. I started wondering what is in the stuff. I imagine it's >just a solvent based cleaner. Then I started wondering what would >happen if I put in a bottle of paint thinner into my gas. Well I'm not >just going to do this without getting some opinions first. So what do >people think. Has anyone done this before? I think paint thinner >does combust well if I'm correct.>
I'm aware this could be a stupid idea that's why I'm checking first.>
Thanks 8-)

One of the best injector cleaners is Chevron Techroline. They sell a
couple versions of it and I don't recall which is supposedly better.
You pour it in the gas tank. I used to have a copy of a research
report on it complete with before and after pictures. It will really
clean up a lot of crude, not just on the injectors but on the valves
and pistons. It's cleaning effectiveness is dose dependent (up to a
point). If you want to get the injectors cleaned up fast use 2 times
the dose recommended on the bottle in a tank of gas, then skip a tank,
then do the next tank with a double dose again. Then change the oil.
After that do a normal dose of it a couple tanks before each oil
change. The oil change part isn't critical but it may put some stuff
it cleans up in the oil so if you can time it to the oil changes it's
not a bad idea.

It's smoothed out the idle on a couple cars I've used it in as well as
friends cars. It's the same stuff they put in their gasoline but in
much higher concentration.
--
Elbridge Gerry, of Massachusetts:

"What, sir, is the use of militia? It is to prevent the
establishment of a standing army, the bane of liberty. . .
Whenever Government means to invade the rights and liberties of
the people, they always attempt to destroy the militia, in order
to raise a standing army upon its ruins." -- Debate, U.S. House
of Representatives, August 17, 1789
Add comment
Comboverfish 23 January 2005 05:09:15 [ permanent link ]
 Pete C. wrote:> Comboverfish wrote:
Pete C wrote:> > >The way it works is to connect to the fuel rail test port and> > >inject pressurized cleaning solvent at that point. You disable> > >the regular fuel pump and then start and idle the engine running> > >entirely on the cleaner. They recommend about 10min of idle> > >time or about 1 can of cleaner for a smaller 4 cyl or 2 cans for a> > >larger 8 cyl.

And to add to that, block off the fuel return line from the fuel> > pressure regulator. Most cars currently in service return unused
fuel> > to the tank; newer ones with returnless systems would not require
this> > step. Rubber return hoses can be pinched shut; hard return pipes
be removed and capped off.
Toyota MDT in MO
You shouldn't need to do that since the 3M system has it's own> regulator. You just use the 3M systems pressure gauge to measure the> normal pressure in the system and then set the 3M regulator a couple
below that which should keep anything from being returned to the tank> while still operating the engine just fine since all you do is idle
it.> Pete C.

Some people do it that way with fine results, but consider 1)it doesn't
hurt anything to pinch off the fuel return 2) you don't know if your
regulator is sealing
perfectly 3)idle speed conditions will cause the _most_ return of
fuel to the tank because the least volume is needed by the injectors.
(multispeed fuel pumps can limit that somewhat)

I would like every possible drop of the cleaner I paid for to get
through the injectors!


Toyota MDT in MO

Add comment
TeGGer® 24 January 2005 07:18:43 [ permanent link ]
 "Comboverfish" <comboverfish@yahoo­.com> wrote in
news:1106425124.989­204.178960@c13g2000c­wb.googlegroups.com:­

And to add to that, block off the fuel return line from the fuel> pressure regulator. Most cars currently in service return unused fuel> to the tank; newer ones with returnless systems would not require this> step. Rubber return hoses can be pinched shut; hard return pipes can> be removed and capped off.



What's your opinion on Motorvac?

--
TeGGeR®

Add comment
Comboverfish 24 January 2005 08:10:55 [ permanent link ]
 
What's your opinion on Motorvac?
TeGGeR®


Sorry man, I'm not the one to answer that. We don't have anything like
it. We've used a BG induction cleaner kit for a short time then
dropped it, and I have a FI cleaning canister for use with OTC
inject-a-flush that I share with the shop. The shop one disappeared
*magically* some time ago. We rarely need to clean injectors on
Toyotas but some models are worse than others.

I've heard nothing but good about the Motorvac carbon clean unit
though. It seems like just about every good independent shop has one.
So that's probably worth something...

Toyota MDT in MO

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CarGuru > Technology > Re: Cleaning fuel injectors question 23 January 2005 05:09:15
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