AndySara

I've had my car for 3 weeks. It had 21 miles on it from the dealer.
When I start my car up in the mornings, or when I have not driven it for a few hours, the idle is rough. The needle on my RPM gauge moves up and down within a 200 RPM range. For a new car, I know it should be rock steady.
Also, my car gets driven on the freeway 95% of the time. I hardy ever take it on city streets but all I am getting is about 25-26 miles per gallon. I have 800 miles on it (all babied). I have also never pushed it past 3000 RPMs (not yet anyway).

Anybody know what could be happening ??
(I have an idea, but I do not want to influence the you guys' opinion just yet)

Eternal TL2k3

well i know my RPM gauge is pretty low when i start my car... dont think its at 200RPM but id think its around 400-500... maybe ur engine hasnt been broken in yet? When its idle, does it shake or something like its bout to stall? How long are u taking to warm up the car? (since ure in florida i doubt its the cold getting to your engine)

AndySara

My regular RPM at idle is at 800. However, in the morning before the car is warmed up, it is at about 1100.
What is pi##ing me off is that it jumps between 1000 and 1200. The engine also sputters. Feels like a car with 120,000 miles on it.
(I use 93 octane Shell Gas...filled it up twice and ran till the gas light came on, so water in the system is not it either)

Eternal TL2k3

stop using Shell Gas... my friend has an audi that he used ONLY shell gas... 2months later he found out that the gas contained sulfer impurities... the fuel sensor gets messed up and he had to get it replaced... good thing he was under the warranty for it, otherwise it wud have cost him a pretty penny

use BP or Exxon if you have it down there... avoid Shell


see how using a different brand of gasoline works for you

SilverUA5

I think you might have dirty fuel injectors, but your car like brand new, so it might be the gas that you use. Try using Chevron. Ever since I bought my car, I've been using Chevron 91 (don't have 93 here) and the car runs smooth and it idles smooth. I drive combination city/freeway and I get 25+ mpg.

AndySara

Thanks....I'll switch Gas and let you guys know how it turns out.

njzprettyboy

no sir...........i had the same problem with my car after i got the GS lights put in........its the IDLE BOOST CONTROLLER...take it to the dealer they will fix it at no charge like they did with mine...

Eternal TL2k3

well just check out if its the type of gas that ure using instead of dealing with the headache of dealers fixing your car... if the gas doesnt work , go with prettyboys suggestion

this is me

Doesnt the weather affect the reving when it idles too? my 03 tls rev at about 400 to 500 in the summer. but now it starts to gets cold and it rev at 1100 or so until the engine warms up. and the rev drop. Mine is not bouncing up and down though

Eternal TL2k3

yeah i noticed my car was around 500 in the summer and now its at 1000 when i start.. weather must make it rev higher

fsttyms1

its supposed to idle high until the engine warms up. then it will drop to the 800 or so rpm idle