Injectors will not fire
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Joined: Oct 2003
Posts: 67
Likes: 1
From: Renton Wa.
Injectors will not fire
New install of 1227727 ecm. Using small cap HEI distributor. VATS disabled on chip. I have power through injectors 12v with key on at ecm plug pins B3 & B9. Using a noid light installed in one injector plug grounding pin at ecm will turn on light, injectors click.
Checked wiring from ingition module to ecm, I have ground on ref low wire B19, < 1v on ref Hi wire with key on, voltage increases when engine is cranking.
Swapped in used ecm and ignition module, no help. Have ecm grounds connected to engine and chassis. Do I need to do anything with pin R6, cranking fuel enable input? I tried grounding it but no help there.
Stumped for the moment.
Checked wiring from ingition module to ecm, I have ground on ref low wire B19, < 1v on ref Hi wire with key on, voltage increases when engine is cranking.
Swapped in used ecm and ignition module, no help. Have ecm grounds connected to engine and chassis. Do I need to do anything with pin R6, cranking fuel enable input? I tried grounding it but no help there.
Stumped for the moment.
Instructor
Joined: May 2008
Posts: 234
Likes: 1
From: Midland Texas
Were I would go is to a scan tool the first thing I would look at is to see if there is RPM intcated while cranking on the scan data if so you are getting igntion single if not start looking at igntion coil igntion module then I would look at Coolent Temp if it is way to hi ECM may shut down injector pluse What year is it a LT1 if so my expertance is limited
