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Need Help w/ my Bronco 2!!!


BroncoBilly2

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My Bronco 2 died on me the other day and wont start...I pulled a plug and cranked it over..Its getting spark, I got a Fuel injector pressure tester and tested it w/ the key on...It read 40 psi...I can hear both fuel pumps when key is on...Im thinking the fuel isnt going thru the injectors....What should i do? Need Help its my Only vehicle...
 


RonD

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Was the spark plug wet?

If not then you are correct, no fuel is going in.

Fuel injectors get 12volts when key is on, you can test for that on any injector, either wire.
The Computer Grounds the injectors to open them, your 2.9l has Batch Fire EFI so computer Grounds 3 injectors at the same time, there are only 2 Ground wires coming from the computer.

The computer needs the PIP signal from the TFI module to start Grounding the injectors, if that wire is bad then computer doesn't know you are even cranking the engine.
 

BroncoBilly2

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RonD thanks!! ...No the sparg plug was dry...So It could be the Computer also right..
 
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RonD

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Yes, or a computers Ground wire, there are 3 or 4 of those, they are not shared internally.
Good read here on the EEC-IV computer(pre-'95,OBD I): http://www.auto-diagnostics.info/ford_eec_iv

pins 58 and 59 Ground(open) the injectors
pin 56 is the pulse signal(PIP) from the TFI module telling computer the timing for the injectors

And good read here on the TFI system wiring and tests: http://www.therangerstation.com/tech_library/TFI_Diagnostic.shtml
PIP is working in the distributor and TFI module or you wouldn't have spark, but there could be a problem with the PIP wire that goes to the computer
 
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