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Re: Ideas?? Quit in rain. (Clogged injectors)
- Subject: Re: Ideas?? Quit in rain. (Clogged injectors)
- From: Tpcutter@xxxxxxx
- Date: Mon, 3 Jan 2005 13:17:34 EST
In a message dated 1/3/05 12:13:14 PM Eastern Standard Time, BeemerGary2
<<Realizing that clogged injectors are rare, I would however like to let it
be known that it can happen. For me, it was on my 1100GS with about 50K on
the clock. This was determined by the dealer who was able to diagnose the
problem by replacing the injectors, and by process of elimination, determining
that one injector was clogged.
The culprit appeared to be a K&N air filter I had been running for 40K
miles. (I switched back to, and have continued to use only OEM air filters in my
bikes since then.)
About 10K later, the bike once again started running poorly, in the same
manner previously caused by the clogged injector. Installing a new throttle
cable resolved 50% of the problem. To resolve the remaining problem, I ran a cou
ple of containers of STP Injector Cleaner (the black bottle) over the next 4-5
tanks of gas. Problem solved, to my surprise and relief. (Injectors cost
over $200 each.)
I now routinely run a bottle of STP Injector Treatment (the white bottle)
between every oil change, pouring in 1/2 bottle per tank beginning about 600
miles before the scheduled oil change to avoid having this chemical spend too
much time in the crank case due to blow-by in the cylinders. I follow this
same routine with my cars as well. At less than $2.00 per bottle, I consider it
to be cheap insurance.
I understand that a lot of riders follow this same procedure using Chevron's
Techron Injector Treatment. I'm not qualified to say one brand of injector
treatment or cleaner is better than another. I can only say that STP worked
for me, and therein lies my prejudice. Better Living Through Chemistry.
Naturally, YMMV. >>
First, you can just post to the list. I see all those posts. Doubling the
post to me is just duplication.
Second, the theory that the K&N Air Filter caused a clogged injector is
flawed logic. The air that passes the filter does no pass THROUGH the injector,
it passes over the tip of the injector. If the air filter were actually
letting debris past (which is common for K&N filters, so your decision to replace
with OEM was a good one). It would only clog the injector PORT, not the nozzle
itself. Pulling the injector to see the flow would not reveal a clogged
port, which would only be discernible by removing the throttle body and squirting
cleaner through the port. These ports DO get clogged with the residue of
fuel vapors, particularly on low-mileage, decade-old bikes. They are easy to
clean. The Injector Cleaner treatment, using either STP or Chevron Techron (I
prefer Techron) will clean the ports somewhat, but a direct cleaning is better.
Also, your STP Injection Cleaner treatment is a good idea, but you are doing
it way too frequently. If you keep it to one treatment annually you will be
fine, unless you are riding in Mexico or remote reaches of Canada where
available fuel stocks are of questionable cleanliness. Even then, the solvent
cleaners will NOT remove rust, dirt and debris from the injection system. They
serve to dissolve gum, lacquer or varnish, whatever you want to call the goo
that builds up.
Regular replacement of your OEM fuel filter is a very good idea, as is
testing fuel pressure at tach tune up.