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I just got a scan tool that gives a live feed and noticed a few odd things. Ignition advance at idle is 21-21.5 I thought that was a lot map sensor reads 31-32 kpa ~9.4"hg and tps never goes below .4%
Are these normal for a 00 ls1 only mods are full exhaust car doesn't have egr or air no lean code just both rear o2 sensors have high voltage even though I don't have rear o2 sensors
I also get a random low idle. ~400-500 rpm. Idle is usually around 800 unless the vehicle is moving then it's around 1000-1100.
The readings you listed all comport with what I see on my scanner for our car, although my TPS does read 0% when the throttle is closed. Have you cleaned your throttle body lately?
A4 usually idel around 1000 rpmQuote:
Originally Posted by V8MUSCLE
M6 around 700-850 rpm.
Interested to read this as both my previous WS6 and my present one
both idle at around 500 once settled down after start up?
I told Steve Williams what the car idled at before his tune and it is still
500 after, so.......?
As far as the idle goes once warm it idles around 800. If I'm on the highway taking an off ramp and nock it into neutral it will idle around 1100-1000 untill the car pretty much stops. It seams to randomly lose it's idle, it then seems to search for an idle, bogging down to 450-500 then surging up to 800-900. I usually force the idle to around 800-900 by keeping my foot in the gas just a bit. After 5 or so minutes of this it will return to its normal ~800 idle. It is a manual so when it is idling correctly it's right on the money.
FWIW, the factory tach may not be 100% accurate. How about cleaning the throttle body?
True on the accuracy of the tach. It is a little off from the scanner watching the live feed, scanner may be off to, but when it messes up there is a huge difference in the sound and feel of the engine. When it idles low it sounds rough and shakes the crap out of the car.
It has probably done it 4 or 5 times in the 3 years 30k miles I've had it.
It is almost like when it searches for an idle after you have the battery disconnected for a while but the engine shakes more even when you use the throttle to keep the Rpms at 800 or 1000