Injector service off car. worth it ?

Has anyone ever had their injectors serviced off the car ? There are
several companies out there who clean and measure before and after the
flow of the injectors. Comes down to around 20 dollars per injector.
This is for a 1.6l corolla engine with 160K miles on it. Idle is a
little rough and there is slight pinging when it's hot out. no Check
engine lights.

"Ray O" <rokigawaATtristarassociatesDOTcom> wrote in
news:2dudnVqed5UHPMXVnZ2dnUVZ_tXinZ2d@:

>
> "RT" <noyabusinessm> wrote in message
> news:fe6h54dn1shil5kbecer7q0ehmc7blajh0@...
>> Has anyone ever had their injectors serviced off the car ? There are
>> several companies out there who clean and measure before and after
>> the flow of the injectors. Comes down to around 20 dollars per
>> injector. This is for a 1.6l corolla engine with 160K miles on it.
>> Idle is a little rough and there is slight pinging when it's hot out.
>> no Check engine lights.
>
> Before you pull injectors, try Chevron Techron fuel injector cleaner,
> Motor Vac service, or BG fuel injector service. If you pull
> injectors, the O-rings will also have to be replaced.
>
> Rough idle and pinging could be from a dirty MAF sensor. Unplug and
> remove the sensor, spray some brake cleaner inside the opening, let
> the brake cleaner drip out, and air dry.
>
> I would try all that stuff before pulling injectors.

I agree. With today's gas having such a high concentration of detergents,
injector fouling is rare.

--
Tegger

On Jun 18, 2:59 am, Tegger <teg...@tegger.c0m> wrote:
> "Ray O" <rokigawaATtristarassociatesDOTcom> wrote innews:2dudnVqed5UHPMXVnZ2dnUVZ_tXinZ2d@comcast.co m:
>
>
>
>
>
> > "RT" <noyabusin...m> wrote in message
> >news:fe6h54dn1shil5kbecer7q0ehmc7blajh0@.. .
> >> Has anyone ever had their injectors serviced off the car ? There are
> >> several companies out there who clean and measure before and after
> >> the flow of the injectors. Comes down to around 20 dollars per
> >> injector. This is for a 1.6l corolla engine with 160K miles on it.
> >> Idle is a little rough and there is slight pinging when it's hot out.
> >> no Check engine lights.
>
> > Before you pull injectors, try Chevron Techron fuel injector cleaner,
> > Motor Vac service, or BG fuel injector service.  If you pull
> > injectors, the O-rings will also have to be replaced.
>
> > Rough idle and pinging could be from a dirty MAF sensor.  Unplug and
> > remove the sensor, spray some brake cleaner inside the opening, let
> > the brake cleaner drip out, and air dry.
>
> > I would try all that stuff before pulling injectors.
>
> I agree. With today's gas having such a high concentration of detergents,
> injector fouling is rare.
>
> --
> Tegger

I must say, I was doing a lot of driving -- around 3000 a month. I
figured some 'injector' cleaner every other fill-up was a good idea.
No. Very bad idea. Be very careful with injector cleaner and don't
use it often. I ended up HAVING to have my injectors removed,
cleaned, and found one was cracked/leaking and replaced it. Now, I
stopped using injector cleaner and just fill up at brand name stations
and haven't had any issues since.

On Wed, 18 Jun 2008 09:55:23 -0700, mrsteveo wrote:

>> I agree. With today's gas having such a high concentration of
>> detergents, injector fouling is rare.
>>
>> --
>> Tegger
>
> I must say, I was doing a lot of driving -- around 3000 a month. I
> figured some 'injector' cleaner every other fill-up was a good idea. No.
> Very bad idea. Be very careful with injector cleaner and don't use it
> often. I ended up HAVING to have my injectors removed, cleaned, and
> found one was cracked/leaking and replaced it. Now, I stopped using
> injector cleaner and just fill up at brand name stations and haven't had
> any issues since.

Some of the injector cleaners are a bit 'aggressive' and wind up
"cleaning" the coating off the injectors MUCH faster than gasoline would.

Tegger wrote:
>
> I think Terry Dyson is overrated and thinks he knows more than
> he actually does.
========

[Chuckle] Well, I think Mr. Terry Dyson of Dyson Analysis is
a renowned tribologist with decades of experience who analyzes
UOAs on a daily basis. He can see, for example, the effects of
different brands of gasoline on engines that have
fuel dilution blow-by problems, piston ring problems, etc.

Finally, people don't pay him $60 per used oil analysis for
nothing, especially when you can get a used oil analysis from
Blackstone-Labs for ~$23. But North America is about
diversity, so you're welcome to your opinion :-) [Lol]

> Finally, people don't pay him $60 per used oil analysis for
> nothing, especially when you can get a used oil analysis from
> Blackstone-Labs for ~$23. But North America is about
> diversity, so you're welcome to your opinion :-) [Lol]

My unsolicited opinion is that used oil analysis is, for the most part,
a waste of money.

HLS wrote:
> > Finally, people don't pay him $60 per used oil analysis for
> > nothing, especially when you can get a used oil analysis from
> > Blackstone-Labs for ~$23. But North America is about
> > diversity, so you're welcome to your opinion :-) [Lol]
> ==============
> My unsolicited opinion is that used oil analysis is, for the most part,
> a waste of money.
========================

I have to disagree here. Huge fleets and sober, bottom line
minded trucking companies employ Used Oil Analysis on an
ongoing basis to protect their costly engine investments.

> And if you do a single analysis without doing it on a regular basis, you
> have no way of knowing what the baseline value is or what the trends are,
> and consequently that's a waste of money too.
> --scott
> --

I've had the oil checked, Blackstone, once. I was only interested in
finding any antifreeze. Everything else was good too but they told me
there was no antifreeze, which is the news I needed. If you have every
lost an engine due to antifreeze in the oil you would understand. I
then was able to track down the reason for a slow loose of the green
stuff. If there had been greenstuff in the oil I would need to return
this, brand new, rebuilt engine.

I don't opt for regularly doing this but after 2 years maybe it's time
for another check-up. 120K on this engine.

disston

Sorry for the double post but I forgot to mention that the original
problem, was it RT, rough idle, running?
I also recomend the MAF cleaning, check vacuum lines while at it, and
prolly a new airfilter. I now do the MAF cleaning everytime I change
the filter. I met a Toyota owner recently who told me he changed the
airfilter only every 80K. My impression was he was just cheap and
tried to explain the false economy of this. Got him thinking but not
sure if he did it.

First things first and then look into this more elaborate stuff. Car
talk lists, like this one, are a great source of info for the public.
But tell us what you did, or had done, recentlly. We will almost
always make you go through some basic stuff before advising the more
exspensive stuff. If not you would spend the 80 bucks to clean the
injectors, plus labour. And still have the same problem. If you don't
know when the last time was the MAF was cleaned, it is time to do it.
Oh, and you can do this yourself, maybe.

disston

"Scott Dorsey" <kludge@panix.com> wrote in message
> You're both right.
>
> IF you do used oil analysis on an ongoing basis and you watch trends, it
> can give you valuable information about your engine, and it can also allow
> you to optimize oil change intervals. On a long-haul truck this a big
> deal and can result in substantial savings.
>
> However, on an automobile that only takes four quarts of oil, it's cheaper
> just to change the oil every 3,000 miles than to spend the money for
> regular
> used oil analyses. Therefore it is a waste of money in this case.
>
> And if you do a single analysis without doing it on a regular basis, you
> have no way of knowing what the baseline value is or what the trends are,
> and consequently that's a waste of money too.
> --scott

I dont disagree with that. Commercial fleets have different goals and
needs.

If there is a specific reason to do an oil analysis, for an individual, I
have no
issues with that. But if you are going to change your oil anyway over a
period
of 3000-7,000 miles, I feel it is money wasted that could have paid for the
oil change.