Markb16a

Hi everyone I have a SOHC Turbo hatch and well I recently took my ac and stuff out as of yesterday and when I took everything out and drove it back home I noticed that my car wont go into boost at all just stops at 0. When I had my ac in it was fine and everything does it have something to do with the ac or what like What I mean is I still had the ac compreesor plug still plugged in to. But when I took it out it just dosent go into boost at all. my neighbor just stopped by and said try grounding the ac comp. wire which is red 1 wire plug connector and see if that does anything. I have heard something about ac cut off but not sure what that is but this is what i have.
hopefully someone on here can help me out. thanks. Mark
JDM d15b
550cc rc
tuned on crome
@ 10 psi
t3t4 57 trim.


Modified by Markb16a at 6:51 PM 2/11/2008

Markb16a

Bump

gettin it

Still researchin bro. Looking on pgmfi.org Talkin with a few guys on there now. Don't cut the wire.


Modified by gettin it at 12:44 AM 2/12/2008

Relic1

pointed here from PGMFI

there are only two inputs that the ECU knows what's up with the A/C.

A15 and B5

A15 is a low side driver for the coil of the A/C compressor relay.
B5 is the A/C request line, which is shorted to ground when the A/C switch is pressed.

if the car built boost even when the A/C was on before it has to be the A15 line.
placing a relay's coil back on the line should put the ECU back to the way it looked pre-removal.

gettin it

So how do we go around this now that the ac is out the car now?

Relic1

either reconnect the A/C compressor clutch relay or wire a relay's coil to A25, and the other side of the coil to ignition power.
but honestly I'm not sure what A/C would have to do with building boost. Unless the car didn't build boost when the A/C is on before the removal.
Or the A/C switch is set to be used as a launch control button...

gettin it

Which wire is A25 then. Im lost a lil bit.

gettin it

Relic, what are you reffering to as coil? Lost on that, but its coming clear too me now.

95dxsir2

maybe you knocked off the boost gauge hose?
does the vehicle still have strong power output?
a25 is a circuit number, the clutch is on the front of the compressor.
A/C doesn't have jack **** to do with boost

Relic1

the more I think about it the more I think that the A/C has little to do with boost, especially since you're stopping right at 0psi.
are you sure that you didn't knock off your wastegate control arm or bump it?

A25 = ECU pin number.

0mtber

iTrader: (2)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 95dxsir2 &raquo;</TD></TR><TR><TD CLASS="quote">
A/C doesn't have jack **** to do with boost</TD></TR></TABLE>

Markb16a

sorry I found the problem now thanks guys for your help.

Relic1

and the problem was?