clean

alright could sombody please help me out, i just purchased a 1993 sc300 and the guy told me all i needed was a new distributor, and i got that fixed. but its doin the same thing as before still, everytime i turn it on it will shut rite off, but if i turn the car on with the gas pedal half way down then the car will stay on, but only with my foot on the gas pedal, i took it to a shop and they did a scan on the computer but the guy said nothin came up on the scanner, and yes he had the rite scanner for the sc300, he said it might be an eletrical problem, he said its not nothin wrong with the motor, some people at work are tellin me its the o2 sensor, i dont know. could somebody please give me some direction before i take it to the lexus dealer , which is crazy expensive

spoiledkid

try to look under neath the drivers side front fender and see if the fender liner is ripped up or damaged in any way. cause the wiring harness goes right the fender and alot of times it can get a damaged. so it could be thought

$loJam

I am having the same problem with my 92 sc 300, or at least simular. I have been able to maintain a very low idle but the car runs very rich on occassion and more so then ever now. I have spent a fortune on it at the Lex Stealership and came up with nothing. I figure it just probaly needs a new cpu b/c the coolant level has not changed telling me that there is no coolant leak therefore it's not a blown cylinder (I guess). I'm either selling mine or parting it out, the car looks great and everything works except the sunroof.

bmatsu

Make sure all of the vacume lines to the intake are in good shape and connected. If those are loose or in bad shape you will get a rough or no idle. Check them out. Good Luck :-)

sc250tt

its probably a vaccume leak bad maf sensor or fried ecu ,it will only take a couple of hours th change out the vaccume lines

if thats the only issue with you sc pm me i will glady take the problem off your hand

bens sc

iTrader: (2)

vac line off or cracked, and im thinking the throttle position sensor.
i have had my car appart 20 plus times, and always had a problem same as yours till i fixed or rerouted thoes two items. think about it give it fuel it works, let off the pedal it dosent correct?