Working on a mates Mk4 GSi running CS Stage 3
problems started couple days after remap
First P0235 popped up then P1106
1106 jumps from present to not-present depending on what parts u replace/fiddle with and clear it etc
0235 will not budge! It seems to be locked into the ECU and the spanner light on constantly
when press "clear codes" whilst engine running - it just stalls.
We have replaced:
Just done the earth mod today on it too.
still no luck.
Next step is to whack on another AFM even tho this one is brand new then he's gonna get on the blower to Courtenay and see what the craic is.
Im inclined to think its remap related and ECU needs to be interrogated further in person by them.
We tried unplugging each component one by one to see what codes appeared but none matched the 0235.
Im aware 0235 is supposed to refer to the front BCS but this has been changed etc and no change.
Op-com however shows the code as:
P0235 - Boost Pressure Sensor Short to Battery - Present
It is permanently in limp mode whilst this code and spanner light is on.
Im led to believe it only peaks at 12psi and holds back - car feels like it wants to go more but the ECU is holding it back at this.
All good and well, it should be boosting to 18psi
Idle is a little rough, up and down ( little better after the earth mod) but still shaky due to the limp etc
My thinking is that maybe the wiring to the rear BCS could be at fault?
I checked for continuity on the negative side of the plug but didnt get a brilliant reading so could only assume it would need to be active to get the correct voltage/continuity
is there anyway we could bypass this OE wiring to the rear bcs to temporarily fault find?
As u can appreciate we're running out of ideas.
One thing that is interesting is that it could relate to the actuator could it not??
When taken to CS the operater took it for a spin wasnt impressed, fiddled with the actuator (increased it to what looks like 5/6 threads) took it out and said the wastegate was loose or something.
Can anyone offer any advice on this before the guy blasts Courtenay on the phone