Help with turbo problems
TURBO Fault Diagnosis
A faulty turbo can cause engine performance issues, MOT failure and, in extreme cases, cause engine damage. Replacement turbos from the manufacturer can be expensive and may not be immediately available.
Turbo Technics can replace your failed turbo from a range of cost-effective turbochargers, either remanufactured or brand new. These are engineered, assembled and calibrated in-house as direct replacements for most car and light commercial vehicle models, available off-the-shelf.
Understanding
Typical Turbo Faults
| Symptom | Diagnostic Action |
| Low boost – wastegated turbo | Check wastegate and actuator operation |
| Low or high boost – VNT turbo | Check VNT and actuator operation |
| Low Boost – all turbos | Check turbo compressor & turbine blades |
| Low Boost – all turbos | Check all air pipework and intercoolers for leakage |
| Low Boost – all turbos | Check for blockage in exhaust system |
| Low Boost – all turbos | Check air filter for blockage |
| Symptom | Diagnostic Action |
| ‘Squealing’ noise on boost | Check manifold bolts for tightness, gasket for leaks |
| ‘Howling’ noise from turbocharger | Determine reason for failure – repair or replace turbo |
| Air sound on boost | Check hoses and intercooler for leaks and replace |
| ‘Screaming’ noise from exhaust | Check silencers & catalytic converter for blockage |
| Symptom | Diagnostic Action |
| Blue exhaust smoke at hot idle | Determine reason for failure – repair or replace turbo |
| Blue smoke while running | Blocked air filter |
| Blue smoke at idle | Restricted oil drain pipe from turbocharger |
| Blue smoke at idle | Incorrect operation of crankcase breather system |
| Blue smoke at idle | Change engine oil and filter-overhaul or replace turbo |
