yep good suggestions above
2 more to add tho
1. please look at your keyboard, in the middle area but to the far left you will find the CAPS LOCK key, please keep this off when posting as it is considered yelling
2. check all the above, make sure oil isn't a milky colour, overheating, leaks etc also check the oil level and the colour of the oil... is it really black or is it really clean or midway
also check in the boot/trunk for rust... it's quite common in toyotas
gl and hopefully you will soon be a supra owner.. .the above is mainly for mk3's... but i guess it can't hurt on a mk4
