OBD 1 resistor replacement question.....

[Yachtcare]

Have a #4 resistor in the FSD mounted in the nostril.

Got a fresh extension cable, as my old one has some visible chafing , and a new #9 resistor to go in at the same time.

Will I need to do a TDCO relearn by installing the different value resistor on the OBD 1? or is it plug and play? Other concerns I should be aware of?

 

[NVW]

It should self learn the resistor value in 50 key cycles or less.

 

[buddy]

true, it will self learn, but if you want it to learn right away and have scanner then running TDCO relearn will update it. You'll probably notice a bit more power, considering a #4 is like to pull fueling back because it was a bit too much on the bench.

 

[Yachtcare]

true, it will self learn, but if you want it to learn right away and have scanner then running TDCO relearn will update it. You'll probably notice a bit more power, considering a #4 is like to pull fueling back because it was a bit too much on the bench.

50 koko cycles is about a week of driving for me, so I wont force the issue.........Provided....
it will relearn the same offset I have it set at now? or will it attempt to revert to a stock value?

I'm doing FTB and a cummins lift at the same time, so I hope I notice a bit more power from something....

 

[buddy]

It doesnt relearn TDCO every 50 key cycles, just the resistor. But it also happens to learn the resistor while performing TDCO relearn.

 

[Yachtcare]

It doesnt relearn TDCO every 50 key cycles, just the resistor. But it also happens to learn the resistor while performing TDCO relearn.

Understood,

thank you Buddy

 

[Turbine Doc]

Question for OBD-I stuff is it 50 key cycles or 50 warm up cycles,?

OBD-II adaptive learns all it's other parameters after X cycles I think 50 passes thru 170F coolant temp TDCO & resistor has to be "taught via ko/ko or scan tool learn command

 

[buddy]

I cant say for sure if its warm up cycles, since its just a resistor relearn it could just be key cycles. I dont think we have any adapative learning.