ColtTDI
Member
I've previously adjusted an actuator and stop screw on a turbo and had good success so I'm fairly well versed in this topic, however...
This one has me a little stumped, I picked up a cheap PD150 ARL MK4 last night as the chap I bought it from couldn't resolve the overboost issue.
Essentially, at 4k RPM the turbo hit 2.0 bar, 94% duty cycle.
I have yet to adjust the actuator myself but I'm told by the previous owner he's literally "Tried everything" including adjustment, MAP sensor replacement and such forth.
I did test the MAF which appeared to show expected vs actual airflow readings where quite close.
The turbo has had a new CHRA installed as the previous one blew up, seemingly due to the same overboosting issue.
What confuses me is why the car isn't entering LIMP mode?
The first thing I'm going to try is to run a basic setting on the N75 and check that the actuator is moving as it should and take it from there.
Does anyone have any suggestions?
This one has me a little stumped, I picked up a cheap PD150 ARL MK4 last night as the chap I bought it from couldn't resolve the overboost issue.
Essentially, at 4k RPM the turbo hit 2.0 bar, 94% duty cycle.
I have yet to adjust the actuator myself but I'm told by the previous owner he's literally "Tried everything" including adjustment, MAP sensor replacement and such forth.
I did test the MAF which appeared to show expected vs actual airflow readings where quite close.
The turbo has had a new CHRA installed as the previous one blew up, seemingly due to the same overboosting issue.
What confuses me is why the car isn't entering LIMP mode?
The first thing I'm going to try is to run a basic setting on the N75 and check that the actuator is moving as it should and take it from there.
Does anyone have any suggestions?