aumsc400

I have a 97 SC400...after it gets good and warm it seems to be idling a bit low...somewhere around maybe 500 or 600......is the base idle totally computer controlled on this car or can it be reset / adjusted? I have disconnected the negative battery cable and reset the ECU....this didn't seem to help.....so is there an idle adjustment procedure? I know on my Miata you have to put it in "Diagnostic Mode" to tell the ECU that you are adjusting the idle. I don't know a whole lot about this car yet. ( Only that it kicks *ss, still after 8 years!!!!!)

aumsc400

come on guys.....someone has to know the correct way to adjust the base idle.

millions

ummmm, thats not a low idle.

YZFR1

What he said............ that is not a low idle for a V8......... at all : D

sebban

I´ve got a low idle!! When my AC is running the idle is fine, but when it´s off, the idle drops down to 3-400rpm for about 3sec then goes up to 500rpm ish. No problem. BUT, my problem is that sometimes when I brake to a stop or nearly stop, the engine dies on me, this happened like 6 times yesterday, very annoying and could be dangerous in a bad situation.
My Lexus dealer here (in sweden) really sucks, they haven't got any manuals and doesn´t recognise the engine (a bit diffrent from the LS version?)
Can you please help me out, maybe show me a pic of where to adjust? (I'm used to wrenching cars, just not this one)

The car is a 95 SC 400

Best regards, Sebastian

aumsc400

well I may be saying the idle is higher than it is.....when sitting in gear at a red light the tach needle is barely sitting above the very bottom zero of the scale....is this normal? this just seems way too low......even in park it isn't much higher than that. I would think that in park the base idle should be around 650? but like I said...in drive with your foot on the brake the tach is barely registering above the bottom mark.