S13 Auto>Manual DIY (In-Progress)

[zerodameaon]

Originally Posted by S13 nerd

my question is you didnt change the the ecu to a manual right? i mean if you had the manual one you wouldnt have to jump out that relay would you? the one that you jumped to "trick" the ecu to thinking your always in park

If you put in the manual ECU you have to jumper some other wires or install a complete neutral safety system so your pretty much doing the same thing in a different spot. Also the auto ECU has no speed limiter and has better fuel maps if I remember correctly.

[S13 nerd]

Originally Posted by zerodameaon

If you put in the manual ECU you have to jumper some other wires or install a complete neutral safety system so your pretty much doing the same thing in a different spot. Also the auto ECU has no speed limiter and has better fuel maps if I remember correctly.

fuel maps? like fuel economy or something? i never thought of that,but say if i want to get the car smogged and checked would it come up bad? i mean i live in the middle of no where in nevada and dont need smog but i was just curious if everything would check out right. would you say it would be better for auto or manual ecu? i have both. this is saying if i had the auto ecu in with the jupers

[zerodameaon]

Originally Posted by drift freaq

You only get CEL on a S14 OBDII . You will not get it on a OBDI car. The idle does drop but not to stall that is a gross over exaggeration of the drop. It usually bumps to about 300 rpm over stock idle and then drops back. If its dropping to a stall point you have other problems as well.

Using a Automatic ECU on a 5 speed swapped S13 or on any S13 is a little stealth upgrade. Like what was said above it raises the rev limit, eliminates the speed cut and has a slightly different timing curve and fuel map. This is due to having to push a Torque converter. Hence why it turns into a performance upgrade for 5 speed cars.

I always leave the auto ecu in on 5 speed swaps on S13 because of this.

That's from this thread, http://zilvia.net/f/tech-talk/274455...ual-trans.html
As for fuel maps and better mileage idk its all based on what others say but it seems to be common knowledge. I get 25mpg out of a Convertible(think heavy car) with the auto ecu but it also feels like it pulls harder then my friends factory manual. As for the light, I don't get one on my S13 and I passed smog in California with it.