If you live in California, the answer is yes due to the additives in the
GM has issued a TSB on 5.7L SPFI engines for California and extended the
warranty on these injectors to 10 years / 200,000 miles.
The TSB tells the service dealers to flush the injectors -- you can do
the same thing by adding the cleaner to the gas tank.
Black Bomb wrote:
It's not absolutely necessary in most cases but, it doesn't hurt. I use
one in my vehicles about every 25,000 miles and everything woks great.
If you want a cleaner that works well though, buy either Techron or
Seafoam; they're the best of the additives that I've found. For a great
spray carb cleaner, I use Berkebile 2+2 Instant Gum Cutter or you can
get the NAPA brand (Mike's Carb Cleaner, I think) spray which is the
same thing (both of them smell like mothballs and work like magic).
I've tried dozens of other brands of carb/injector cleaners/sprays and
these are the only ones that I've found to work as advertised. Rich B
There are two classes of pedestrians in these days of reckless motor
traffic - the quick and the dead.
~ Lord Dewar 1933 ~
Climbing into a hot car is like buckling on a pistol. It is the great
equalizer. ~ Henry G. Felsen 1964 ~
The newest cars have a smaller opening in the injectors than cars of the
past. This leads to more injector clogging. I can tell you that on the newer
3800's, we have to flush injectors frequently because cars come in with a
miss. Many have under 20,000 miles. We hook up a pressurized cylinder with a
can of GM top engine cleaner and gas mix(about 5 to 1 gas to cleaner) then
disable the fuel pump and run the car on this mixture pressurized to 40-55
psi depending on the engine and it stops the miss. I guess these people will
be paying for this once the cars are out of warranty. It just shows that you
may have never had this problem in the past, but if ever there was a time to
start adding injector cleaner, it would be now.
I'll put in my two cents here since I just within the last month
researched and had my injectors cleaned using a "motorvac" which is the
same as described using a fuel/cleaner mix that is run through the
I had rough idle and miss on a '95 2.3L. It just wouldn't go away. I'd
use Seafoam and that tank it would run great, then it was back to
normal. I finally decided to have them cleaned using that method.
It worked wonderfully, and was fairly inexpensive, though not at all
when compared to buying a can or bottle of cleaner.
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