Poor Response / Lacking Power

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Turbo vacuum lines
Exhaust leak at turbo to engine manifold
Air leak in ducting or charge air cooler
Air or exhaust restriction
Engine failure
Turbo failure
Ignition failures
Fuel system failure
Check for swollen, brittle, broken or cracked vacuum lines particularly at clamps, bends or sections contacting other components. Review nipples or connections for lines at one time as lines may have fallen off or were removed by others. Replace all accordingly.
Exhaust leaks can lower the pressures required to operate the turbo. Review section interfaces and gasket interfaces. Locate possible deterioration or holes via soot marked areas or audible noise.

1) Carefully inspect all metal and rubber ductwork connections, seals, clamps, o-rings, gaskets associated with the turbocharger. Repair and replace as needed.

1) Inspect ducting for bending, collapsing, rust or deterioration.  Remove ducting and inspect internally for oil or material restriction.  Repair and replace as needed.  Install new air filter per manufacturer recommendation.

2) Clogged charge air coolers can be reviewed with thermal evaluation guns across the cooler face.  Temperature should drop from compressed air flow ducting across the charger cooler into the exiting ducting.  Pressure should remain the same at the entry and exit of the cooler.

3) Muffler, converter or DPF filter can clog and restrict air flow.  Any changes to air and ducting size can effect pressure and volume required to achieve correct turbo performance.

Examine the turbo particularly in the turbine housing and turbine wheel and shaft ( fan blades) area for damage and oil residue. Damage in these areas of the turbo can be the result of engine material (valves, keepers, springs, ring and piston material, exhaust carbon) passing out the exhaust stream and into the turbo as all exhaust passes through the turbo. These discharged components cannot pass through the small tolerances within the turbo and cause damage. If the turbo is replaced and the root cause of the failure is not corrected repeated turbo failure may occur by additional discharge of material.
Review all other causes and actions in the technical data sections within this site. Often other system and engine issues will cause a turbo to fail just prior to the real issue failure. Note system scan tools can indicate a turbo failure code that is another component or device failure other than the turbo or a combination of parts failing.
Review engine management modules, sensors and ignition components to assure loss of power is not the result of these item failures.
Review and or replace fuel system management devices such as fuel filters, pressure sensors, fuel injectors, fuel or injector pumps. Consult your owners manual or commercially sold technical manuals for your application to assist in fuel system related components.
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