Last post on May 20, 2003 at 9:08 PM
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May 16, 2003 (7:49 am)
Injectors usually fail from wearing out over time, not from clogging, unless perhaps it's a rare case of some bad bad fuel or something.
Of course a "trade association" is going to recommend service products--they are hardly "disinterested" parties.
I just can't think of what this service is trying to accomplish exactly. It seems to be aiming at a problem so statistically unlikely that it isn't worth doing for 99.9% of drivers. You can wear a helmet while typing and you may indeed fall out of your chair, but you know, what are the odds here?
#15 of 23 OMG, my head!
May 16, 2003 (3:54 pm)
depends on the source...
#16 of 23 Of course, I drink heavily
May 16, 2003 (4:07 pm)
while posting on Edmunds, so next to my chair sits my new HJC CJ-12 black full face helmet, just in case.....
#17 of 23 if you clean up carbon
May 16, 2003 (6:45 pm)
what color is it?
May 17, 2003 (11:18 am)
I've seen RUSTED injectors, and very old sticking injectors, but I can't recall ever seeing a clogged injector on a low mileage car. Electronic issues YES but not clogging.
#19 of 23 " if you clean up carbon", by swschrad "what color is it?"
May 18, 2003 (5:05 am)
From Lancaster Toyota-Mazda Premier Value Service Brochure:
Motorvac Service now $98.50
"The fuel injectors spray fuel into the engine through a nozzle with tiny holes the size of a human hair. When the nozzle slowly build up deposits (apparently at 45,000 and 75,000 miles per the service manager at LTM) the holes become restricted and are no longer able to create the mist of fuel needed for proper combustion. This decrease in performance over time is so gradual that many owners are amazed how much better their vehicle runs after a complete engine decarboning and fuel injector cleaning. We use a highly specialized top engine cleaning procedure using the MotorVac machine that not only cleans the injectors, but also removes carbon from the intake and combustion chambers as well."
If you clean up carbon what color is it? Perhaps, it appears GREEN$$$ to the service department?
#20 of 23 Larry, you're right!!
May 18, 2003 (6:36 am)
May 18, 2003 (10:55 am)
If you are concerned about carbon, then here is a product that you can use yourself.
GM Top Engine Cleaner. It is about $20 and if you follow the directions to the letter, it will do just as well as what they are talking about.
There are also kits, like this one and uses this cleaner solution.
For less than the cost of them doing the flush once, you can have the tool to do the flush any time.
#22 of 23 my neighbors at 3M thank you
May 18, 2003 (9:34 pm)
it's a serious detergent mix in gasoline, our local car writers rate the 3M and Wynn's systems highly. they're similar products. you basically take off the fuel line and pull the fuel pump fuse, thread in the kit hose and connect it to the $20-30 can of extremely detergent gas, and start 'er up.
but I can see no good reason to clean 'em unless you have a fuel starvation problem with good pressure at the rail.
if that doesn't do it, you need to replace 'em. somebody (GM?) had injector windings 15 or 20 years ago that had the insulation on the injector's coils gradually eaten away by fuel additives, and those engines all of a sudden needed a lot of injectors when they shorted. suffice it to say, that doesn't happen any more.
May 20, 2003 (9:08 pm)
...0patience, Carman and everyone else who passed on their thoughts. I feel better educated about engine cleaners and carbon build up in injectors. I thank you all for the time and effort put into your posts.