ok all I have a dumb question I am just picked up a 302 from a 98 explorer with about 60k miles on it to replace the carbed 302 in my boat. With it being a 1998 engine what sensors can I safely remove and have the engine run. I have done it with a 1989 302 in my pickup but never a OBDII engine.

oh and before it comes up the boat is fresh water cooled so no salt-water will be going through the engine.

Thanks,
Yonu

 

Are you swapping the fuel injection as well or is it going to stay carb?

 

Nope I am swapping over the efi as well which is the reason I was unsure of what sensors are absolutely required because of it being OBDII

 

Leave all of them alone.

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What about the stuff that can't be swaped over like the exaust sensors?

yonu

 

You will need the front two for sure. The rears will need to be turned off with a tune or just deal with a code for them. You could get some O2 simulators and add extra bungs in the exhaust but those seem to be hit or miss.

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You can't put an automotive EFI system in a boat and that's mainly because of the O2 sensors. You can use this motor no problem but you will have to strip it to the bare longblock and install all the standard marine intake and exhaust components.

 

With some custom tuning I don't see any reason why it couldn't be done. Just lock the thing into open loop and make sure your fuel tables are dialed in. No feedback from O2 sensors required.

 

Are you familiar with inboard exaust manifolds ????

 

You wouldn't need the O2 sensors.....

And no, I am not but I would imagine putting O2 sensors in would not be possible. That is why I am suggesting to just tune it to run in open loop.

 

It would be unreliable , at best . A marine engine operates under different load conditions than a road engine .

 

Hence the tune required.

How would it be unreliable? Have you ever tuned a vehicle?

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I'd agree with that but I got the impression the OP was wanting to utilize the Explorer system as is which besides being a giant PIA for multiple reasons(no PATS, no auto trans inputs, no speed input) would just result in a crippled EFI system running pig rich which means he may as well put a carb on it.

 

I Have not " tuned " a vehicle . I Have repaired many due to faulty " tuning " Most tuners I see , in my area , are problematic at best . Many issues are likely compounded by improper add on components . Too many people reading on line posts by some jackleg ....

 

So you are unaware that a vehicle with efi cab be tuned to run just fine without o2 sensors.

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