11 replies to this topic

[Jock]

Fellas, Experiencing a weird problem ATM. Turbos are stock VF13 and VF14. Primary turbo seems to be working OK, but when I get to about 4500 to the changeover, I lose all boost. Totally gone. If I keep trying to go to redline, normally the car goes to limp mode, CEL comes on and the dreaded Code 66 comes up. There's no smoke or exhaust isn't any louder than usual. No new rattles and I wasn't overboosting (max 14psi). Checked under the car and all exhaust bolts appear OK. Took off the TMIC and changed the big gold actuator on the secondary just in case that was causing any dramas (and cause I had a spare). This didn't make any difference, nor did blocking up the 2ndary wastegate (mate's theory on wastegate stuck open). Wastegate rod can be moved with pliers. Before I try swapping turbos, I'm keen to hear of any other suggestions. It seems to be an issue with the changeover itself rather than the turbos itself. Vacuum hoses appear to be in place. The ones under the TMIC haven't dislodged, and the metal valve under the TMIC can be moved with a bit of force, doesn't appear stuck. I can still drive around on the primary only..... Any help would be greatly appreciated!

[Soop]

Try swaping that valve under the IC first bud.

[Jock]

Update - turbo was seized. Turbine doesn't spin at all and blades look a bit bent. Possibly due to a kink in the top oil line. Thanks to Paul and others at the Hooters meet for taking the time to help diagnose possible vacuum issues.

[aekOne]

i've got a VF26 & VF27 i'm not using at the moment

[DRIVER]

bummer John... but great diagnoses by Paul spot on the money

[Soop]

Munted turbo's are tricky to spot eh.

[twinturbosubaru]

Mmm, not bad conclusion, I have a spare 14 if you want it mate, just let me know. Regards Paul

[alexGT]

its a sign to convert to single turbo...

[Soop]

It's a Single turbo atm...

[DRIVER]

John bigger turbos and some engine work make it fly TT FTW.....

[twinturbosubaru]

Keep it on track please boys, unnecessary crap deleted. Paul

[Jock]

Thanks for the support fellas. I've put on my spare VF14 and she's up and running again. Damn I missed the top end rush! (doesn't compare to yours though Paul)