Hi guys. gotta start be thanking everyone involved with this form. Great wealth of info. here. OK... I have a 91 ls400.. It threw the belt due to a bad tenchener. Replaced it and belt. car would drive then die . start ,drive a bit, die. I Checked the crank position sensor . wires ect... for damage. saw nothing but when I put it back in. The car ran flawlessly for about 2 months. Now it runs , dies ect....... After reading the other post I am very sure that I need to replace the ECU. It has the series of #s that I hear were recalled from the factory. I machanic a bit but here is where Im stumpped. When the car started dieing. I started to hear this Sucking air sound like the intake (air cleaner ) assy had a leak. It would start and stop like it was controlled by vacume or a switch. It seems to lack a little power but now stays on the whole time the car is running. Could it be the MAF or VAf some call it? Its almost as if airflow were restricted. Guys. IVe checked airfilter,housing, rubber intake parts, vacume lines. I cant believe I havent figured this out. Also. No code but traction lite comes on. I think the check engine light bulb needs replaced.