hello, i'm not sure where to post this, sorry if its the wrong spot,
I have a 2.5 duratec, and have been wanting better gas mileage on the highway, i was wondering if it's possible to make a switch to turn off a few of the fuel injectors, so i potentially would have a four cylinder engine, much like chevy suburbans have the "on demand engines" that turn off some of the injectors during highway driving. Would this idea work, or would the pcm get screwed up, or possibly ruin my engine?

Originally posted by azs:

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...I have a 2.5 duratec, and have been wanting better gas mileage on the highway, i was wondering if it's possible to make a switch to turn off a few of the fuel injectors,...

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I doubt it is possible to make a switch for that, the PCM would need to be reprogrammed or it will think that the engine is running lean and then compensate until it reaches a limit, and then turn on the P0171 and P0174 code. And then go into the limp mode and you will be looking at worse gas mileage again.

Save gas, drive slower or sell the Duratec and buy a Zetec.