1992 sc400, runs great usually, then at idle stalls out and.

al010101 · Lexus Owner Joined: Jul 15, 2005 Posts: 1

i have a 92 sc400, just got it on sunday so i don't know much about it at this point, i have tomorrow off so i need to figure it out then. heres the problem..

the car will run PERFECT all day, but then Randomly (100% random), maybe at a stop light, or after you shut the car off and try to restart it, or maybe stopping to put it in reverse, it'll stall out and it'll take a Lot of cranking but it'll start back up, and run Horrible, always starts back up and either runs perfect like nothing happened, or it'll sputter and run like crap then die, start it back up, will either run like crap again or run perfect, once it runs perfect again, no problems! till the random stall comes again, could be 20 miles, could be the next day.... any ideas?

it also gives out a exhaust smelling of rotten eggs occasionally when i restart it (cats?)

i read the other topics and realize it could be the fuel pump ecu but i'm hoping it's something cheaper/easier to find locally or something i can fix myself.

i have changed the fuel filter and cleaned the throttle body and air filter but it still happens, might happen in 2 miles, might happen in 20 miles... once it happens, the car also smokes out the exhaust and runs horribly, then it'll rev up to 2000rpm and sit there for a bit and smoke some, then it'll run perfect,

i ran the check engine light codes and got a tp sensor, ks signal, and sub o2 sensor codes.

any ideas would be nice, this thing is driving me nuts, but i don't want to just toss money at it.