A Toyota Camry is never going to be fast, ever. Changing the gearing will not help this very basic fact.
My 85 year old father has one
The engine at that mileage should be run gently and the automatic gear box allowed to do its own thing
The engine will still go to max rpm and survive, but not very often and not for long with out a serious failure.
Yes, if the the engine is a steam engine or a diesel engine. The diesel engine smoke should be almost invisible when the engine is in good condition. Electric locomotives are not typically called "engines", but these do not produce smoke.
=Check the crank sensor connections, and sensor condition. It should be located on side of engine closest to the firewall.=
It should be next to the engine dipstick.
The fan should run when the engine reaches a set temperture. If it does not and the engine is overheating, check the thermal relay.
You should inspect a camper's condition to make sure there are no mechanical issues. You should check the engine, brakes, tires, belts, hoses, interior, and body.
When overhauling an engine, you need to consider the condition of the engine block, heads, crank, and camshaft. Any of these may need resurfacing or replacing, and the cost may be high enough to look at a complete replacement engine.
When the check engine light is on the computer has information that you should know. Connect a code scanner to find out why and most likely it will tell you what is causing the rich burn condition.
This condition is called "dieseling" where the engine continues to run on after the ignition key has been turned off. It means that your engine timing is way off ... a complete tune-up of this engine should end this situation.
A compression check and cylinder leak-down test should tell you the condition of your engine.
It shows that your battery is in workable condition and your alternator is charging as it should.
The best things to look for in a used truck, much less any used vehicle, is gas mileage and engine condition. Gas mileage is for gauging deterioration and checking engine condition is key or else you will buy a car while having to pay for the repairs as well.
should brakes be kept in a good condition