- Joined
- Jun 13, 2025
- Messages
- 9
Hi everyone, having seemingly endless issues with trying to get these twin turbos working properly. Any advice is much appreciated. Making no boost from primary turbo whatsoever, secondary turbo pulling well but i imagine not making full power as both should be working together at that point.
Its a 99 spec car on an apexi
as it stands ive ran through the vacuum lines, replaced the solenoid box, turbo control solenoid and the precontrol/wastegate solenoids. Still no luck. Had it checked over and vacuum side seemed ok, Then advised to replace the turbos by a specialist as front turbine spinning very slowly. Bought a set of rebuilt twins and fitted, still the exact same . Nothing whatsoever until about 4500 rpm. Anyone had a similar scenario? Was temped to bite the bullet and go single as this is getting very tedious but realistically must be something fairly simple to fix as ive near enough replaced everything 
The charge control actuator appears to be working correctly which given the symptoms I thought was the most likely culprit. Check valves and the vacuum/pressure tanks are fine.
Its a 99 spec car on an apexi
as it stands ive ran through the vacuum lines, replaced the solenoid box, turbo control solenoid and the precontrol/wastegate solenoids. Still no luck. Had it checked over and vacuum side seemed ok, Then advised to replace the turbos by a specialist as front turbine spinning very slowly. Bought a set of rebuilt twins and fitted, still the exact same . Nothing whatsoever until about 4500 rpm. Anyone had a similar scenario? Was temped to bite the bullet and go single as this is getting very tedious but realistically must be something fairly simple to fix as ive near enough replaced everything The charge control actuator appears to be working correctly which given the symptoms I thought was the most likely culprit. Check valves and the vacuum/pressure tanks are fine.
