For anyone with a funky idle

[CJ_Boxster]

Oh ok, Well when my idle started getting alittle loopy, I eventually got the P1115 CEL code and i replaced that sensor and now the idle is more less steady... it could be better but when i replace all the sensors and locate a possible vacum leak, the engine should idle much smoother.

[blinkwatt]

Originally Posted by CJ_Boxster

Oh ok, Well when my idle started getting alittle loopy, I eventually got the P1115 CEL code and i replaced that sensor and now the idle is more less steady... it could be better but when i replace all the sensors and locate a possible vacum leak, the engine should idle much smoother.

Howcome you didn't change all four sensors? I heard that you can get by with just changing out either the front or rear sets of sensors.

[CJ_Boxster]

Well I decided to just replace the 1 sensor and see if the idle and operation of the boxster imporved... which it did greatly! So i plan on replacing the remaining 3 sensors probably sometime between tomorrow and 2 weeks from tomorrow.

I think im lucky cause i still havent gotten an CEL for the other 3 sensors, i hear about alot of people getting CEL for the other 3 when replacing just 1.

[Wonko The Sane]

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...

So keep those revs up, kiddies

[Brucelee]

Modern cars generally do not "carbon up" anymore.

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