LyFeWoRx

I know I know... It's that question help me fix my car over the internet heh. I'm not looking for an answer, just a few suggestions and places to start.

The vehicle I’m working on is a 92 SC400. Here is a quick story about what happen.

I was driving on my way to work minding my own business going around 70mph, the car stopped running and I had to pull over to the side of the road. The electronics work, the car had a ton of power no signs of going bad, I tried to turn it over it cranking but not starting. I popped the hood open and noticed a little bit of black smoke coming from where the diagnostic port is. Then about 20 secs the smoke stopped the car won't start... just cranks and cranks nothing.

Does anyone have any idea? Tomorrow I’m going to test for spark and fuel. Any ideas would be great, not sure if it's a common problem.

Thanks,

Michael

JamaicanSC

When I bought my 92 SC300, my died on me twice. I found out the hard way that the alternator was busted, so I would suggest checking that out.

Inabj2

Did you check your fuses?

LyFeWoRx

I have a code 12 or 21 coming up now. PRE OBD2

1 Long Light
2 Short Lights

LyFeWoRx

12 - RPM Signal
21 - Main 02s & Heater Signal

My heater always had problems working, but i know this is not the cause heh. I had a leak. Damnit I hate this car =)

LyFeWoRx

Just cleared the codes, and made sure no codes were in the system, tried to start again... Same thing 12 or 21.

LyFeWoRx

I'm going to try to bypass the fuel pump ECU tomorrow, then maybe get a walbro, and see if that helps. A few people on another board are telling me the early sc400 fuel ecu's go bad pretty easy. Also the fuel pump does have 250k on it.

mkorsu

As someone else stated, did you check the fuses? Smoke by the diagnostic port would first make me thing the EFI fuse blew.

O. L. T.

iTrader: (17)

Moved this to the engine forum for you.

LyFeWoRx

bahhh I swear i posoted in the engine forum. Doh. I checked the 30 amp EFI fuse, it's good to go. The main EFI fuse i'm not sure how to check it.

LyFeWoRx

I still can't find any info on code 12 or 21.

LyFeWoRx

No one has had this code? I find it hard.

kschiu

Did you check the timing belt?

CleanSC

Yep, pop off the timing belt cover and look inside. See if it turns when you crank the car.

Sounds like a classic busted belt.

ki_soarer

ive been dealing with the same thing on my SC300 this past week. although i think i found my problem... one of my injectors may be stuck open and flooding my motor. who knows. best of luck, i know how you feel.