The world of diesel was permanently altered in 1994. Ford Heavy Duty trucks started using the International Navistar 7.3L Powerstroke engine. Comparing the 6.9L IDI and 7.3L Powerstroke Diesel engines to one another, the former offered noticeably greater performance specs. Additionally, it provided noticeably more dependability than the 6.0L Powerstroke engine that came after it. …
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