Banks Power Ford Trucks: (Diesel ’83 - 93 6.9 & 7.3L) Forced Induction- Sidewinder turbo system (Van) 6.9 & 7.3L - Manual (Page 22)

tuRBO dIeseL tROuBLe sHOOtIng cHaRt
sYMptOM cause ReMedY
High egt excessive fuel delivery change injector pump setting
faulty injector(s) Repair injectors
Restricted exhaust system Modify pipe layout for better
flow, check for restrictive mufflers
excessive fuel smoke (black), faulty injector(s) Repair injector
poor performance
dirty air cleaner clean or replace
Restricted air intake check for collapsed or blocked
air intake hoses
poor quality or dirty diesel fuel Replace filters, clean lines,
injectors and tanks as required
Excessive oil smoke (blue) blocked or restricted turbo Eliminate restriction or low spots
oil drain in drain line
Leaking turbo oil seal Replace turbo, replace seal;
(seal leakage may be caused by
blocked turbo oil drain)
excessive engine blowby Replace worn piston rings or valve
being vented into the air intake guides. check engine oil level.
Lack of boost, damaged turbo bearings and Rebuild turbo, check oil level;
excessive oil smoke, seal caused by dirty oil or lack change oil and filter at regular
and poor performance of lubrication service intervals
Worn or damaged engine check compression, Replace rings
components or valves
22 P.N. 96308 V.2.0