Hey all, I bought a 2001 Jetta TDI 5-speed manual back in November. Only mod to the car is an Upsolute chip installed by the previous owner. The car ran great, with no major issues. Then I decided to clean the intake manifold. Things were great, then about a week after cleaning, I began having issues with limp mode.
Now I'm getting limp mode accompanied by a P1556 Negative Pressure Deviation code when pulling a hill at 2k-2.5k RPM in 4th or 5th gear, and only part throttle. I can pull a hill with the "pedal to the medal" just fine, turn around and hit the same hill at part throttle and get limp mode. One of the common causes are vacuum leaks, so I checked the vacuum lines. After checking the vacuum lines no less than a dozen times, I can confirm they are all connected and routed in the proper configuration. Since I didn't haven't this issue before the cleaning, I assume that none of the hoses have holes.
I rented a hand vacuum pump from Advance Auto to try to actuate the VNT actuator. I found that the actuator does move, but will only hold 15 inHg vacuum. I'm not sure if this was the pump hitting its limit, or actuator leaking.
So, I might have a bad actuator. Since the actuator moves, does that mean that my VNT vanes are alright, or is it possible they are frozen as well?
Where can I get the circlip for the actuator lever without having to buy the whole actuator?
Is it possible that the newly cleaned intake manifold has caused this problem to surface, or is it just coincidence?
Thanks for your input.
Now I'm getting limp mode accompanied by a P1556 Negative Pressure Deviation code when pulling a hill at 2k-2.5k RPM in 4th or 5th gear, and only part throttle. I can pull a hill with the "pedal to the medal" just fine, turn around and hit the same hill at part throttle and get limp mode. One of the common causes are vacuum leaks, so I checked the vacuum lines. After checking the vacuum lines no less than a dozen times, I can confirm they are all connected and routed in the proper configuration. Since I didn't haven't this issue before the cleaning, I assume that none of the hoses have holes.
I rented a hand vacuum pump from Advance Auto to try to actuate the VNT actuator. I found that the actuator does move, but will only hold 15 inHg vacuum. I'm not sure if this was the pump hitting its limit, or actuator leaking.
So, I might have a bad actuator. Since the actuator moves, does that mean that my VNT vanes are alright, or is it possible they are frozen as well?
Where can I get the circlip for the actuator lever without having to buy the whole actuator?
Is it possible that the newly cleaned intake manifold has caused this problem to surface, or is it just coincidence?
Thanks for your input.