The knock sensors in the early cars altered ignition timing, not the fuel mixture.
In the early EFI systems, which ran the gamut from the VW squareback and '70s 264 et al Volvos, were prone to complete (walk-home) failures. The progression was then to the mechanical CIS/K-Jetronic for its reliability.
These days it is common to run a car 150,000miles or more with only the MAS cleaning and O2 Sensor replacement in the fuel system, some more. It's come a long way since Bosch Motronic etc.
I still like the mechanical injected diesels too, ...
Quote:
Originally Posted by tjts1
Volvo went from Djet, Ljet, Kjet (80-82) and then immediately dumped Kjet in favor of LH 1.0-3.1 from 83-93. By 89 they were using knock sensors with 10:1 CR on 87 gas. Those systems were perfectly reliable. I don't know why mercedes stuck with Kjet for 15 years right up to Motronic.
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