| Possible Causes | Solution |
| Dirty air cleaner element | Clean or replace filter element |
| Plugged crankcase breathers | Clear obstruction per manufacturer's manual |
| Air cleaner element missing, leaking, or loose connections to turbo | Replace, repair or reconnect air cleaner element per manufacturer's manual |
| Collapsed or restricted air pipe before turbocharger | Inspect pipe for damaged or obstruction, replace or repair |
| Restricted or damaged crossover pipe-turbo to inlet manifold | Inspect pipe for damaged or obstruction, replace or repair |
| Foreign object between cleaner and turbocharger | Inspect air intake piping, remove foreign object |
| Foreign object in exhaust system (check engine) | Inspect exhaust piping only when engine is not running and cold, remove foreign object |
| Turbocharger flanges, clamp or bolts loose | Inspect all connecting hardware for damage, ensure tight fits per installation instructions |
| Inlet manifold cracked, gaskets, loose or missing, connections loose | Remove and inspect inlet manifold for damage to castings and gaskets, replace if needed |
| Exhaust manifold cracked, burned, gasket loose, blown or missing | Remove exhaust manifold only when engine is cold and not running and inspect for damage to castings and gaskets, replace if need |
| Rstricted exhaust system | Inspect exhaust system only when engine is cold, not running, remove obstruction |
| Oil lag at start - up | Inspect exhaust system lines, filters and oil for obstruction, remove obstruction |
| Insufficient lubrication | Inspect exhaust system lines, filters and oil for obstruction, remove obstruction |
| Lubricating oil contaminated with dirt or other material | Replace all filters and lubricating oil with new per manufacturer's manual |
| Improper lubricating oil type used | Replace lubricating oil with correct grade |
| Restricted oil feed line | Remove and inspect oil line, remove obstruction |
| Restricted oil drain line | Remove and inspect oil line, remove obstruction |
| Turbine housing damaged or restricted | Remove turbine housing, inspect for cracks or wear, replace if needed |
| Turbocharger seal leakage | Inspect for proper oil feed/drain line installation, contact ETE distributor for rebuild |
| Worn journal bearings | Contact a ETE performance distributor or ETE master distributor |
| Excessive dirt build-up behind turbine wheel | Inspect air cleaner element and intake piping for damage or leaks, replace if needed. Clean compressor wheel and housing |
| Excessive carbon build-up behind compressor housing | Inspect crankcase ventilation |
| Too fast acceleration at initial start | Decrease acceleration at initial start |
| Too little warm-up time | Extend warm-up period |
| Fuel pump malfunction | Refer to engine manufacturer's manual and replace if needed |
| Worn or damaged injectors | Inspect injectors for damage and replace if needed |
| Valve timing | Refer to engine manufacturer's manual and replace if needed |
| Burned valves | Refer to engine manufacturer's manual and replace if needed |
| Worn piston rings | Refer to engine manufacturer's manual and replace if needed |
| Burned pistons | Refer to engine manufacturer's manual and replace if needed |
| Leaking oil feed line | Remove and inspect oil line, remove obstruction |
| Excessive engine pre-oil | Refer to engine manufacturer's manual and replace if needed |
| Excessive engine idle | Refer to engine manufacturer's manual and replace if needed |
| Coked or sludged center housing | Contact a ETE performance distributor or ETE master distributor |
| oil pump malfunction | Refer to engine manufacturer's manual and replace if needed |
| oil filter plugged | Refer to engine manufacturer's manual and replace if needed |
| oil bath cleaner, air inlet screen restricted/dirty air cleaner | Replace air inlet screen |
| Oil bath air cleaner, oil pull-over/oil viscosity too low or high | Replace lubricating oil with correct grade |
| Boost control malfunction:wastegate | Inspect for damage, leaks or obstructions; replace or repair if needed |
| Boost control malfunction:vnt | Contact a ETE performance distributor or ETE master distributor |
| Boost control malfunction:engine management system | Refer to manufacturer's manual and adjust as needed |
