no spark from my eec-4???
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no spark from my eec-4???
hey guys noob here.
my 89 f150 5.0 4x4 4spd. died in the middle of the road. no spark. changed coil, tfi module, distributor, another tfi module. still no spark. i have 40 psi fuel pressure. 12.9 v at the coil. 12.9 at the tfi module. if you remove the eec4 relay it gets spark but no fuel pump prime signal (which is normal.) the ecm controls advance in the timing so could this be an ecm failure? all other switchs in line ohm good. pullin my hair out.......
my 89 f150 5.0 4x4 4spd. died in the middle of the road. no spark. changed coil, tfi module, distributor, another tfi module. still no spark. i have 40 psi fuel pressure. 12.9 v at the coil. 12.9 at the tfi module. if you remove the eec4 relay it gets spark but no fuel pump prime signal (which is normal.) the ecm controls advance in the timing so could this be an ecm failure? all other switchs in line ohm good. pullin my hair out.......
Lead Driver
Joined: Aug 2006
Posts: 5,670
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From: Sand Lake, MI
Is the ground at the battery in good shape, the blk-lt grn wire? And the ground to the inner fender there next to the bat, clean and tight.
Ground points for the EEC and ignition module shielding.
Ground points for the EEC and ignition module shielding.
Lead Driver
Joined: Aug 2006
Posts: 5,670
Likes: 13
From: Sand Lake, MI
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