Dr. Greenthumb
Veteran Member
Having boost and airflow issues after new turbo install. I will bullet point what I have done and see if this rings any bells.
I replaced the turbo - used the garrett.
No boost.
Low airflow through the MAF.
All vacuum lines replaced.
Vacuum solenoid tested faulty
Throttle valve faulty and replaced ~5K miles ago
No CEL at any point.
So I am looking at the EGR valve now and here is my question, finally. It seems to be faulty.
When engine running
Removed valve and cleaned soot and electrical
Connected to harness and ran output test
The question is - does the valve sound faulty, or an electrical issue?
I replaced the turbo - used the garrett.
- No adjustments needed, actuator arm hit stop at 20 in hg
- Replaced all intake gaskets and exhaust gaskets.
No boost.
- Request 900 mbar
- Actual isn't much over atmospheric
Low airflow through the MAF.
- No blockage in the intake path.
- Per vag com, Requested is 800mg/str - actual is a bit over 400mg/str.
- Replaced MAF sensor with new Pierburg sensor.
- No change.
All vacuum lines replaced.
Vacuum solenoid tested faulty
Throttle valve faulty and replaced ~5K miles ago
No CEL at any point.
So I am looking at the EGR valve now and here is my question, finally. It seems to be faulty.
When engine running
- un-plugging harness does nothing -
- re-connecting the motor smooths out for a second and returns to poor running
- No CEL
Removed valve and cleaned soot and electrical
Connected to harness and ran output test
- Valve did not move freely
- Valve did not seat
- Open/Close cycle inconsistent
The question is - does the valve sound faulty, or an electrical issue?
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