Fox T-Bird/Cougar Forums

Technical => Engine Tech => Topic started by: marcmdm on August 31, 2005, 05:28:16 PM

Title: Hellllpppppppppppppp
Post by: marcmdm on August 31, 2005, 05:28:16 PM
my 1984 tbird 3.8L TBI wont start. I tried to check for spark and I did not see one. I changed the coil and still no spark. When I try to start it it just cranks and cranks and doesnt fire. Could a TFI module cause the coil to shut down??

Please help me I am stuck

Thanks
marc
Title: Re: Hellllpppppppppppppp
Post by: Haystack on August 31, 2005, 05:29:46 PM
it could,.... How constant is the turning over? check the ignition switch and mess with those wires too.
Title: Re: Hellllpppppppppppppp
Post by: marcmdm on August 31, 2005, 05:49:07 PM
it just turns turns and turns very constant. it is like it is not getting any gas but it is. Just no spark
Title: Re: Hellllpppppppppppppp
Post by: marcmdm on August 31, 2005, 06:25:19 PM
so maybe the tfi module?
Title: Re: Hellllpppppppppppppp
Post by: greg wys on August 31, 2005, 08:56:04 PM
I never say anything bad about Fords, but, check your ignition module, they are natorious in these cars.
Title: Re: Hellllpppppppppppppp
Post by: marcmdm on August 31, 2005, 09:00:22 PM
ignition module as in where is it located?
or what does it look like???
Title: Re: Hellllpppppppppppppp
Post by: greg wys on August 31, 2005, 09:26:49 PM
on the 84 im not sure if its on the distributor or not. if it is, its a large plastic piece with a wiring harness attached to it. it might be on the driver side fender as well, if so large metal box (grey in color) with Ford EEC number on it and a whooper sized harness
Title: Re: Hellllpppppppppppppp
Post by: mjbtbrd on August 31, 2005, 09:28:15 PM
tfi module looks like this:
Title: Re: Hellllpppppppppppppp
Post by: mjbtbrd on August 31, 2005, 09:29:26 PM
tfi test info here:http://www.therangerstation.com/tech_library/TFI_Diagnostic.html

try the grounding of pin 5 test  should help you
Title: Re: Hellllpppppppppppppp
Post by: marcmdm on August 31, 2005, 09:32:31 PM
yea i knew what the tfi module looked like. I just havent heard it called the ignition module. and thanks for the link for testing it !!!!!!!!!!
Hopefully I can find a ride to test it out

Thanks
marc