On a 2.3 L engine, why did they lower the compression when they changed to FI from carburation


Asked by Mar 22, 2014 at 06:35 PM about the 1985 Ford Ranger S Standard Cab SB

Question type: Maintenance & Repair

From info I've been able to dig up. (84 2.3L carburetor has higher compression) when FoMoCo changed to fuel injection (85) they lowered the compression ratio.

2 Answers


EPA regulation change in 1985, they did it to pass emission standards.

Tracy Hooks

Yup. Most likely to cool combustion temperatures and lower Oxides of Nitrogen.

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