itr_hybrid

Hi folks,

Since I had the rats nest out anyway, I decided to test my solenoids using Dave Disney's method. I'd love some input on my results as it is a lot easier to replace them now.

I am also not sure which of the following solenoids actually see boost, so I'd appreciate some input there as well. In other words, for which of these solenoids do I actually need to worry about the boost test.

FWIW - I run the stock full sequential set-up with a PFC, DP, and hi-flow cat. The max boost I would run is probably 12 psi. I currently run 10 psi.

I tested the solenoids at room temp. The first number is the highest boost pressure (in PSI) that the solenoid would immediately release at. Above that and there would be some hesitation while the pressure bled off. The second number is the pressure at which the solenoid would stick open completely.

The results using the names from the Vac diagram

B - 11/15 Relief 1
D - 9 / 11 EGR
E - 14/16 Turbo Control
F - 12.5/15 Charge Control
H - 13/15 Charge Relief

The rest of the solenoids (including WG and precontrol) were tested with the mightyvac for releasing vacuum and boost with a simpler test that does not involve the pressure chamber on the output side. Basically pump up pressure/vac and see if it releases. They all tested fine.

Thanks for your time.
- Phillip

dgeesaman

iTrader: (7)

The solenoids that see pressure are the wastegate, precontrol, turbo control pressure 'E', Charge Relief 'H', and Charge control 'F'.

The EGR and Relief 1 solenoids are not related to boost control.

Since your "strongest" solenoids are in the right places, I would use them as they are. I tested a couple brand new solenoids that would stick at 15-16psi, so they seem very good.

If you haven't already, test the Turbo Control vacuum solenoid (unlettered on the diagram) to see that it doesn't stick both hot and cold.

I would also test all of them again while hot, although the backpressure setup isn't as necessary in that case - usually hot tests cause the winding to open circuit and the solenoid will leak or not click at all.

Dave