Quote:
Originally Posted by MAXUM
That's because your Lexus doesn't have a throttle body EFI system, instead it as multipoint. Depending on the age and model it may be using Direct Injection.
These systems require less maintenance in fact arguably none unless an injector goes bad. This assumes you are using good quality gas.
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Even if you have multiport injection you still have a throttle body. The throttle body controls the amount of air being let into the intake to mix with the fuel. They do get dirty but if you're getting it clean more than every 30,000 miles you're probably getting ripped off unless you travel a lot of dirt roads.