For anyone with a funky idle

[MNBoxster]

Originally Posted by Brucelee

Modern cars generally do not "carbon up" anymore.

However, I would suggest some Chevron FI cleaner. It def. cleans up my funky idle.

Hi,

Agree. With OBDII the AF/Timing is so dynamic that it's virtually impossible to Carbon-Up. If you do, you have waay bigger problems than just having the car sitting idle.

On the other hand, as you mention, fuel and fuel quality, have a much greater effect on the performance of a modern engine. Gasoline is a very unstable compound and wants to breakdown into it's constituent parts, some of which are parafins (erroneously referred to as Varnish).

Gas used to be stable for only 30-45 days from refining (not when you fill-up) before it started to breakdown. Modern Gas will go about 60 days before suffering the same effects. This is why a fuel injector cleaner once annually and/or the use of a stabilizer if driving infrequently or storing the car (even for a short duration) is especially helpful...

Happy Motoring!... Jim'99

[CJ_Boxster]

Hmm, i didnt know that gas has about a 60 day shelf life before it starts to really separate. Ill keep that in mind if i ever store a car.

[FrayAdjacent]

Don't they call that an 'Italian Tune-Up'?


Sometimes you gotta feed some speed to your ride!



And the Chevron stuff is 'Techron'. It's about $5-6 a bottle, but works great at cleaning up the fuel system. Used it in my 911 to clean out the fuel lines after transplanting my engine and gas tank into the tub that had been sitting for 17 years.

I usually use a bottle of Techron every time I change the oil, but I think since the Boxster's change interval is a little longer, I'll try to drop a bottle in every 3 to 4k miles.

[MNBoxster]

Originally Posted by FrayAdjacent

Don't they call that an 'Italian Tune-Up'?


Sometimes you gotta feed some speed to your ride!



And the Chevron stuff is 'Techron'. It's about $5-6 a bottle, but works great at cleaning up the fuel system. Used it in my 911 to clean out the fuel lines after transplanting my engine and gas tank into the tub that had been sitting for 17 years.

I usually use a bottle of Techron every time I change the oil, but I think since the Boxster's change interval is a little longer, I'll try to drop a bottle in every 3 to 4k miles.

Hi,

Lots of people praise Techron, but I've never used it. I use http://www.********************************************/acatalog/Lubro_Moly_Jectron_Fuel_Injection_Cleaner.html developed specifically for Fuel systems in German Cars. This is a well respected Fuel System cleaner and I've always had great results with it. For the Boxster, I use it half-strength, so it's maybe slightly cheaper than the Techron. But, I'm sure they're both good products...

Happy Motoring!... Jim'99

[edevlin]

"I had always heard of this called an "Italian tuneup," because the old Italian cars would literally need it to run properly... Of course, in my other world of rotary powered engines, the cars that were driven by old ladies to church are known to die of boredom, i.e., the engines build up carbon and it starts to tear at the apex seals... "

Well, I am pretty regular with my "Italian tuneups", try every time I get in the car.... But I recently did a tuneup that seemed to make the car more responsive and eliminated some of the "gurggle" I normally get when slowing down in gear. The tuneup, which should be a DIY job for most on the forum, consisted of:


1. Changing spark plugs

2. Cleaning MAF sensor

3. Changing, or in my case cleaning and reinstalling the air filter

4. Running a two tanks of gas through the car with Chevron Techron additive



BTW, the car was running fine before this tuneup and it was not time to change the sparkplugs or filter based on recommended maintenance schedule. But now it seems to just hum, I really love these engines, even with the problems built into their design, they are very sweet!!! This is a great weekend project to get ready for top-down weather, enjoy

Ed

:dance:

[Cloudsurfer]

My favorite cleaner is BG Products 44K. About $20 a can, but amazing stuff in my opinion.

Patrick