ZapBrannigan

I was afraid of that. Mine still bucks when the gas tank is low and builds up vac. I think this is because the purge control never opens because the 96 legacy doesn't have the same kind of evap system and only handles the pressure solenoid under the intake, not the plug in the back corner I guess the 1104 is the same situation. Maybe I'll try to find a new ecu. Let me know if u get more codes, I suspect my 507 will go away as it usually isn't active and is only thrown because my purge control system is 'clogged'

We are working with the same definitions of codes, I'm not sure what sparked that question, but maybe it was the approach I took with the TPS and idle screw adjustment, so I'll address that first. I noticed it would only have the problem during or shortly after a long period of engine braking, say coasting down a hill at like 40 MPH, in gear. And, in this case, I know the engine leans itself out to not waste fuel, so I thought maybe it was because the idle screw had already been adjusted, and adjusted improperly. I wish I hadn't ever touched it, but it was already done, so I tried to set it back. The state of the car now: I replaced the grounds from batter to engine, and batter to body. They weer both really bad. I know this car sat a while, outside, with a hole or 2 in the roof (why the ECU was toast) so I suspect the wires in the harness might be bad, and that's probably why, as you said a few posts ago, the P1104 is getting thrown. It was running fine for a while after I replaced the grounds. But then when the tank got a lil more empty, it started having some low-rpm issues again (a rough idle and bucking and stalling occasionally) I checked the gas cap and there was some vacuum (i heard it whoosh) in the tank, so I think the improper evap setup is the reason I'm having issues. I think this problem is along the lines of: the purge line has a solenoid in there that the 96 legacy ECU has no intention of controlling, So the evap line to the engine is never opened. I'm going to try and bypass or remove the purge solenoid today, and see where that gets me.

On second inspection... What about linking the two lines for the can together, and connectig that node to the vac solenoid under the intake, so whichever goes to gas vapor can be drawn into intake. Then, I'll reinstall the evap box so the purge solenoid is hooked up properly. Then if it connects the purge line, it will open the line that goes to the can now.

I am so happy to see your reply. I checked out the link re: p0441, I have some questions about evap, but first, let's talk ecu/p1104. I did try the 97 ecu but it had some water damage. A long story really. There is a ground on my B22 but I might try jumping a new ground in there. I tried adjusting he screw on the tb, thinking maybe it was too open and the tps never reads true zero. It still ran funny, but different. I've got the ground off the battery now. This could also explain the high idle problem I still think there's something wrong with my evap. The legacy used a can in the engine, and the impreza used a box in the back. I have tried a few configurations. Right now the can is connected up front and the back is all blocked off. Now I'm gonna try to block the front and use the box or attempt to trace these lines and resolve the system Ideas as far as evap configuration goes? Thanks for your help.

I am in a very similar situation P1104 P0441 P0507 96 legacy 2.2L and ECU into a 97 Impreza Wagon both 5mt and AWD did it drive fine before u added the ground? Mine sputters bucks when I engine brake. Any idea how to resolve the evap canister situation? (imp used a box in the back, legacy used a can up front)