Will an auto ecu work for an 5 spd

[clever240sx]

Ok, Someone just emailed me and they had a auto ecu for sale. But i need it for my 5 speed rb20. And he said that the auto ecu will work for the 5 speed. Is that true?

[Joe]

yep ive got an auto mines ecu in my manual rb25.

can someone verify this for the rb20: on the rb25 you need to ground a wire, i think it was the park/neutral switch. if you dont your timing is different and you idle high.

[themadscientist]

When I do auto conversions I have always looped back the wire for the neutral safety switch on the relay box behind the headlight otherwise they would not start at all. Never noticed and weird idle on RB20s or CA18s that were once auto.

[blues14]

can you expand on the 'looped back the NSS"? I have to run way advanced timing with my converted rb20 with auto ecu. I had a shop do my conversion and i dont know if they did this.

[Joe]

When I do auto conversions I have always looped back the wire for the neutral safety switch on the relay box behind the headlight otherwise they would not start at all. Never noticed and weird idle on RB20s or CA18s that were once auto.

it might be a rb25 only thing

mine had a noticably high idle (1000ish) then i grounded that wire and it went "normal" to 700.

[goofynick6]

I think I did a thread involving setting timing on the rb20/25, do a search for it.

You do need the neutral switch wired in because it changes the idle and timing. I remember it was important.

Also, make sure the tps is set properly because there is an idle switch inside it and if it's not triggered then the car won't idle right.

NIck