5.4 to 6.8 swap *need help*
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New User
Joined: Jan 2006
Posts: 21
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From: manahawkin, new jersey
5.4 to 6.8 swap *need help*
Finally finshed the installing the new motor. Motor cranks but wont start. I have spark on all cylinders. Pressure in fuel rail but not sure how much. i dont hear any "clicking" coming from the fuel injectors. i measured the resistance on the injectors and its good. I just went out and got a new battery for it. Im not sure where to go from here. any help is appreciated.
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
Likes: 423
From: Long Island USA
Check all the grounds on the engine, the cab and between the battery and everything else.
Looking in my EVTM for 2001, it appears that the fuel injectors, IAC and a couple of other things are driven right off the PCM power relay. There are fuses in-line AFTER the PCM power relay in the battery junction box that provide power to the injectors. The PCM basically grounds an injector and causes it to open. The +12 is provided by the PCM power relay, and those fuses.
Check the RED/LIGHT-GREEN wire at the injector for +12V with the key on.
Does the check-engine light come on when you first turn the key on? (it should, given you have spark).
Looking in my EVTM for 2001, it appears that the fuel injectors, IAC and a couple of other things are driven right off the PCM power relay. There are fuses in-line AFTER the PCM power relay in the battery junction box that provide power to the injectors. The PCM basically grounds an injector and causes it to open. The +12 is provided by the PCM power relay, and those fuses.
Check the RED/LIGHT-GREEN wire at the injector for +12V with the key on.
Does the check-engine light come on when you first turn the key on? (it should, given you have spark).
