Well i have the GM 3 bar map sensor and also the missing link. I did some searching and i see that you can just use the missing link, so whats the benifit of having the 3bar opposed to the missing link? Also, i have a little bit of a wiring problem with the GM 3bar... On the hondata installation manual it says:

GM code Honda wire color
A green/white
B white
C Yellow/Red

However my wires for my map sensor are:

Red/white
White/Blue
Blue/White

I dont have a multi-meter to measure voltage right now, so does anyone know how i can run it without having to go into hondalogger to datalog the voltage? Thanks.

 

also, im not 100% sure its a 3bar, how can i find out?

 

Thats not a gm 3 bar map sensor, I can tell at it just from looking at it. A gm one would be a long skinny rectangle looking map sensor with a flat green plug.

 

why are you using a misssing link with hondata? hondata allows the ecu to understand boost. the advantage of using a 3 bar map over the stock map is that it allows the ecu to read up to 28psi where the stock sensor only allows~11psi


[Modified by racerxadam, 11:12 PM 9/17/2002]

 

And you wouldnt use the missing link with it. A missing link takes out the boost in the vacum line to trick the map sensor into not sensing boost. A 3bar gm unit can sense boost...thats the reason you run it for the fuel curves of the boost sensor.

 

i just installed the hondata tonight, i havnt started it up yet bc i cant figure out the 3 bar wiring... the missing link is still on from the "pre-hondata" install, i plan on removing it. i read something on a different post about using the missing link instead of the 3 bar so i thought i would ask that question. Anyways, does anyone know how to wire it up? the picture above is the STOCK map sensor, the wire colors are different then hondata described... thanks guys


[Modified by GudeH23a, 11:17 PM 9/17/2002]

 

The missing link is a check valve, it will not allow positive pressure in. It will not work with hondata. The gm 3 bar can read more boost pressure than the stock map can handle, and hondata needs to be able to read that pressure if you go above one bar. It sounds like you want to know how to hook up the gm sensor, it's wise to wire it in parallel rather than cutting the oem off. I will check my wiring in the morning and let you know.

[edit- oops, multiple replies ]


[Modified by apexii, 11:20 PM 9/17/2002]

 

ok disreguard the whole missing link thing, someone on a different thread posted that up and it didnt make sense but i thought i would ask. I guess i wasnt clear enough in the first post i made. Anyways, the missing link is off i just need to know how to run these wires since mine are a different color then on the hondata installation manual. If i dont find out how to run the wires tonight i can still drive it safely up to 11psi theoretically on the stock map sensor, correct?

 

you need to remove the missing link!!! J/K i figured i would say that as 20 other did! anyways if your basemap is set for the honda map sensor then yes you can drive the car, isf the map is for the gm 3bar then no please dont drive it as the map will be all messed up. hope this helps

 

im not planning on boosting above 5psi until it is dyno tuned friday. On my sheet it says "Boost Cut 11.2psi" and the base map is for a "H22A 17lb turbo." Ill call hondata in the morning and see whats up, thanks guys. the Missing link rocks haha



[Modified by GudeH23a, 1:31 AM 9/18/2002]

 

boost cut will be set at 11.2psi until you check the 3 bar map sensor box.

Its called, "default setting"

 

Good luck trying to use that basemap..i tried it on my h23a-t and we had to keep modifiying that fuel map to get a decent map that i could actually drive the car around with, until i get it tuned. but then again i have 550cc injectors and that is for 720cc i think.

Let me know how it goes.


[Modified by LudEcrous, 1:38 AM 9/18/2002]

 

the car started right up and drives with no problem on that base map, i just need to figure out how to wire the 3 bar.