:( I recently purchased a non-running '86 Toyota Van. The previous owner was having overheating problems. Troubleshooting led me to a blown head gasket. I replaced all gaskets, a cracked exhaust manifold, and did a complete tune up, plugs, wires, dist cap and rotor, etc. When I first started the repaired engine it had a miss at low rpm and lacks power in overdrive when the engine is running at a lower RPM. It seems to run pretty good at higher RPM unless the miss is just masked by the higher RPM. I have had the cat. converter checked and it was not stopped up. I've been an Aviation Technician since '69 and have owned and restored many classic cars over the years but this little Toyoto engine has me baffled. Anyone out there have any ideas or same type of problems with their Toyota's? Any help will be greatly appreciated. :D