I dont know what happened. I was on my way home and all of the sudden it feels like im running REALLY rich and only on 4 cylinders, it doesnt overheat, the check engine light has yet to come on, and I really can't accelerate. It backfired on me when I got it into the driveway, and there are a lot of squeeks comming from the engine bay. Im going to post a video as soon as I can figure out where I put the camera cord, if you have ANY good guesses, PLEASE let me know! Its an SC400 with 210,000 miles on it. Thanks!

 

 

Thanks...i guess...

 

I recently bought a sc400 and was having the same problems .i checked everything including ecu, leak down, distributor,plugs and wires and top coil. Bottom coil looked good so i did not thought it would be the problem .it turned that was my problem ,hope this helps.