A general question - how long do they last on modern cars ? My Corolla's done 140k now in 4 years ....
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Well, my injected '84 Jaguar could well be still using its original injectors. They're probably unfashionably large and inefficient, but are/were made by Lucas based on a Bosch design. They even survived several years laid up. A dose of cleaner sorted them. As for modern ones? You could always take them out and get them cleaned, which will establish whether their performance (flow rate and spray pattern) has deteriorated. You're lucky, there are only four of them, not twelve.
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