There are many places where you can purchase a rebuilt HEUI injector, and almost just as many places claiming that they rebuild them.  Our experience has shown that most of these injectors have simply been dis-assembled, cleaned and then re-assembled.

A HEUI injector such as used in the Ford Powerstroke engine is very complicated, and has extremely tight tolerances.  It is also very difficult to rebuild/remanufacture this injector properly without the proper tooling and equipment.  On first inspection most would assume that this injector is simply "non-adjustable" and its calibration depends on the sum total of it's parts.  Although this is true in some respects, there are several places within this injector where improper assembly and/or rebuilding methods can have negative effects.  In many cases the resulting variances in calibration are simply ignored by many injector rebuilders. 

A good example (although not the only one) is the "Poppet Valve Travel vs Armature Clearance".  As this injector wears in the course of normal usage, the poppet valve travel increases.  As long as the additional poppet valve travel does not exceed armature clearance this injector will still work, and in some cases the engine will give no indication that there is a potential problem.  The moment the poppet valve travel exceeds armature clearance the valve will leak, and the injector will fail.  Normally, this type of wear is not evident until the injector is near the end of its expected service life  ... unless .... the last person to rebuild this injector did NOT return these tolerances to original specs.  In this case, this failure could happen a week after the injector was rebuilt!  When static tolerances are returned to original dimensions, this problem will never be an issue. 

Even if an injector does not fail due to excessive poppet valve travel, this excessive travel will have an effect on the injectors performance.  If an injector is only tested at full load and/or idle loads and speeds this problem will not be evident during testing.

HEUI injectors remanufactured by us are returned to original like new tolerances.  Both the upper and lower poppet valve seats are refinished, and all static dimensions are returned to original specs.  All seals and springs are replaced with new.  Nozzles and plungers are either remanufactured to "like new" tolerances or replaced with new.  Check valves are replaced or refinished and all sub-assemblies are checked for leakage to insure they meet or exceed the original specifications. 

Each injector is calibrated using a series of 7 different tests emulating all phases of engine operation.  Both low and high pressure circuits are tested for leaks.  

We provide our customers with an injector that will perform and last just like a new one!