Ryeno

iTrader: (3)

Alright i test drove a 98 sc400 vvti, fully loaded with the nak audio system and a car phone. On the gauge cluster i noticed 2 red led lights.

That right led is always red and on the opposite side of the cluster their is another red led, that one blinks sometimes. I have seriously no idea what they are for. The only thing i can think of is a radar detector system.

Also the car has been in an accident, rear bumper and spoiler have been repainted. and here is the sketchy part the shift **** is replaced too. Now as you guys can see that idle is crazy low. While driving the car it feels perfect but when you are at a stop light the car feels like its stalling, cuz it is. I am assuming if i put the car in neutral at a stop light and if the problem goes away its a tranny problem while if it remains its an engine problem. Does that sound logical?

topdog849

iTrader: (1)

looks like a radar detector to me. whats your idle in neutral? try acouple cans of sea foam, that fixed my low idle.

Ryeno

iTrader: (3)

that car is not mine, i test drove it. As in i am thinking about buying it.

QwkSC

iTrader: (1)

Mine goes that low on some hot days and either dies or goes away after a
Minute. But I've never seen it do that constantly. Actually it's got a cool "cammed" sound to it.

My hunch is fuel filter or fuel ECU. I need to catch it like that when I'm in the shop so I can hook a pressure gauge to the fuel rail.

topdog849

iTrader: (1)

you can cross out fuel filter, thatll just cause hesitating and jerking upon acceleration. try the 12v fuel pump ecu mod https://www.clublexus.com/forums/per...tures-faq.html

Amini9

Well my car idles that low when its warmed up and driven for 10+ minutes.. Anything bad about low idle? It doesn't act lke its going to stall or anything, perfectly normal..

mteele

iTrader: (5)

Check the IAC....

You should also be able to tell if its a built in radar detector, look under the hood for any aftermarket wiring or strange looking boxes near the front bumper.