ADDITIVES....GOOD or BAD???

How harmful are the additives that are sold to clean fuel injecters and the
like..

I have a 1994 Integra with 209,000 miles and it still purrs and runs great.
For about a year I have a cold weather reving problem that lasts for about 1-2
minutes upon startup and when it has been sitting for a couple of hours. It
revs from 1400 RPM to 2000RPM rapidly until it warms up and then settles down
to a "normal" idle...about 800RPM.
My mechanic said to try a few tanks of premium gas( I have always used regular)
and I am on my second tank and upon startup it is getting better, but after
sitting for a couple hours I still get the reving problem!....In case this does
not work I was considering a "cleaning additive " of some type.

Any thoughts???

 

No fuel additive or "better gas" is going to make your problem go away.
I suspect you have a vacuum leak somewhere in your system. What is
happening is that when the car is cold, whatever line or gasket running to
the intake manifold or sealing it, respectively, is worn out. As the car
heats
up the hose or gasket expands sealing the leak.
If you hook a pressure gauge to one of the vacuum lines you can verify
it is a indeed a vacuum leak very easily.
You will see your gauge wonder up and down as
your car moves from 1400-2000 RPMs.
If this is the case then do the following.
To solve the problem, first inspect, and replace if necessary, all hoses
leading to the intake manifold. Replace the PCV valve (cheap $2.49
at any autoparts store).
Provided all the hoses are good and you still have the problem, get a
new intake gasket from NAPA (just bought one the other day for $16)
and replace it. If that still doesn't solve the problem, then you will have
to separate the throttle body from the manifold and replace the gasket
(about $5) that seals the manifold the throttle body.
Again I doubt you will have to do all this things, but if you do as you
can see, if you do all the work yourself it is very cheap (under $50).
Now, if this still doesn't solve your problem:
pull out the injectors and replace the O-rings around then. Since they
are plugged directly to the manifold they could be causing a vacuum
leak.

I hope the advice helps, keep us posted. So many people receive advice
and never bother to post the solution to their problem once they
actually fix it. Thank you to those who do.

- JR

 

JR,

I've found a very quick way to "isolate" and "locate" a vacuum leak without
replacing hoses, o rings, etc.

Get a can of carb claaner with the narrow sprayer tube. With the engine
idling, spray at all hose connections, fuel injector mounts, etc. If a leak
is found, you will note a sudden stumbling or reduction of rpm's.

Replace the defective part......

Good luck,

Rich

 

DO NOT USE ANY ADDITIVES!!!!

I used it once on my older Honda (which was running great) and it stalled on
the freeway. The fuel filters got clogged because of it.




....................
I do not killfile nor use do-not-call lists.

 

Hey, Pimpi, just because you cheapened out and used a junk fuel system
cleaner doesn't mean they're all junk.

Techron by Chevron is great stuff, highly recommended--by professionals,
even.

 

Techron by Chevron is great stuff, highly recommended--by professionals,

Yes, a professional troll, who has made it his life mission to strand everyone
in here by giving false advice. LOL!




....................
I do not killfile nor use do-not-call lists.

 

Despite what the DrPimpDaddi says about Elmo P. Shangnasty; Shangnasty is
correct about Chevron Techron. And the best way to administer Techron is to run a
few full tank fulls of Chevron Supreme . Of course you can also purchase the
additive in a bottle from any Chevron station.

http://www.chevron.ca/ProductsServices/Retail/FuelSystemCleaner.htm

No, I don't work for Chevron, either.

--


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Freedom is not free; Free men are not equal; Equal men are not free.
You can't always get what you want... But if you try some time. You just might
find, you get what you need.
A wise man that finds himself in the middle of chaos; takes a nap.

 

I still think the best additive to try first is isopropyl alcohol.

If the problem above is NOT a vacuum leak, it might be moisture in the
fuel.

Try a bottle of isopropyl drygas available just about everywhere for
$1 per bottle.

I also like Red Line SI-1 and Schaeffer Neutra 131 in addition to the
Chevron Techron already mentioned:

http://www.schaefferoil.com/data/131.html

http://redlineoil.com/redlineoil/si1ti.htm

--- Bror Jace