NA with Code 42 What happens if ignored? OBD 1

[J30tChumpCar]

Long story short I am trying a z32 ecu in my track car, a J30. This particular year J did not come with a fuel temp sensor, wire or a place to screw one in. What does the computer strategy do when it is missing this info? How important of a input?

Car seems to run great other then this one code. Track practice is in 5 days and I dont want to go out there with it in some sort of limp mode...anyone with a FSM ,the J30 manual skips code 42.

[J30tChumpCar]

Bump

Track practice is a couple days away,Sebring full course race for 14 hours in 2 weeks, anyone with a FSM that can quickly read and see if the computer changes strategy when code 42 is encountered?

Thanks

[nissanfreak12]

How about tricking the computer to think its there? There is a way to bypass the knock sensor by adding a resistor, this may work in the same fashion, like jumping the wires with the resistor that is equal to the fuel temp sensor. If that doesn't work how about finding a sensor and instead of having plumbed into the hard line, find a way to plumb it into the rubber lines. Just a thought.

[J30tChumpCar]

Good idea, it is just a resistance value, the only problem is picking a value(or sensor relocation) that approximates what fuel rail temp will be under continuous race conditions, I have no idea or way to collect that data, it is possible I could make things worse then if its simply ignored and let the computer estimate/guess.

I primarily service American cars and can easily research the "side effect" of a missing value,but in this situation I have not been able to figure out what happens in default, thus my question here. It was suggested by someone knowledgeable that Nissan over-engineered and I will be fine without it, I see no harm in asking a wider knowledge base.

Practice first thing Saturday...

[nissanfreak12]

Is it street legal? Try driving it around, on the freeway, do a lot of small burst and see what happens. I do not think it will put in limp mode, if anything it will always think its cold fuel, but this I am really not sure. If it does throw it in limp mode, I would really think about getting a T fitting, splice it into the rubber hose section of the fuel line, and put the sensor in the T section.

[J30tChumpCar]

Not street legal, it has been put on a serious diet sports a lexan windshield & a 8 point cage, the best we can do is blast down a .5 mile road.

Testing first thing in the morning, going to bring a spare j30 ecm just in case.

[J30tChumpCar]

Ran the car hard for 100 miles @ PBIR with no major issues or engine light, if there is time I will add some sort of dummy sensor but either way this ECU stays.

[nissanfreak12]

Glad it worked out!!