Got a CEL on....code coming out is P0507....I'm still trying to figure out where the leak is. But now, when the engine is hot and that the idle gets higher than expected(from 1100 to 1200 rpm) this noise shows up...stops when I rev it.



I'd gladly appreciate your help!

Thx

 

Start by checking for vac leaks or blocked pcv valve.

 

PCV valve is new...just changed it and yeah I'll plug the leak tester this weekend and keep you updated

 

Update** Found out there was a leak in the turbo inlet pipe, i've temporarily fixed it and will replace it with a Forge unit. The whistling noise doesn't come from the rear end, so I don't think it could be the fuel pump nor filter. The noise only appears once the car is hot and also it disapears when I step on the throttle, it isn't speed related since its not increasing as the rpm goes up. I've looked at a thread talking about the PS issues in cold weather, which I'll check out tomorrow.

Any more ideas would be welcome. Oh and also when I've scanned it, the code P0171 system too lean bank 1 comes up now and the P0507 disapearred. The idle doesnt go higher than 1000rpm now but still should be at 800rpm.

 

Just an update. it was the T valve under the intake manifold