I emailed you a copy of testing fuel pressure, it could be a weak fuel pump setup. There is also a Technical service bulliten on several parts, glow plug relay, a short in the injector cicuits or IDM, Press Ctrl+F to find exact text
7.3L D.I. TURBO - REDUCED POWER - NO START - NO DTC
TECHNICAL SERVICE BULLETIN
Reference Number(s): 03-21-3, Date of Issue: October 6, 2003 FORD:1994-1997 F SUPER DUTY, F-250, F-350; 1997 ECONOLINE Superceded Bulletin(s): 95-6-13, Date of Issue: March 27, 1995 Related Ref Number(s): 03-21-3, 95-6-13
Article 95-6-13 is being republished in its entirety as part of a consolidated 7.3L diagnostic aid booklet.
DRIVEABILITY - REDUCED POWER - NO START - 7.3L D.I. TURBO - IDM MODULE - NO DIAGNOSTIC TROUBLE CODES
A "no-start" or "reduced power" condition may occur intermittently on some vehicles. This may be caused by a short in the injector circuits or the IDM module.
Follow the diagnostics listed in the Diagnostic Guide and refer to the following Service Procedure.
Part Name IDM Module
Page 1 of 2
1. If, after completion of all the steps in the Power Stroke 7.3L (DI Turbo) Diesel Diagnostic Guide, you are unable to pinpoint the cause of the concern, proceed with the following steps. 2. Disconnect the IDM Module connector and using a DVOM, measure the resistance between the injector circuits to ground. If it is less than 5 ohms resistance, repair the short in the circuit and retest. 3. If the concern still exists, replace the IDM module.
There is also one for the injector cusion seals. This can cause all kinds of problems and is only detected by removing and inspecting them. A new design seal kit is available. If any one needs replacing, all must be changed.
Thursday, February 25th, 2010 AT 7:17 PM