Batz
New Member
- Messages
- 24
- Location
- Hawes northyorkshire
When I get to 6500 rpm there is a hissing noise comes for the engine bay sounds like from the rear of the engine but I can't be sure as it only does it when driving also a lose of power,I've made a bung and done a boost leak test and found a leaky seal on the throttle body shaft so replaced these but still no better,I've pressure tested again but no leaks and blew it up to 30psi but still can't get it to hiss like when I drive it,tried blanking off the blow off valve but still the same so not that,checked everywhere with soapy water,bin pulling my hair out with the dam thing anyone have any ideas?