Replacement engine in '98 Blazer.
Old engine ran on this ECM, so the ECM is believed to be OK.
Fuel pressure is 55 PSI.
Everything appears fine except that I am not getting any voltage at the
injectors to make them pulse.
The engine will fire when primed manually, but the injectors are not delivering
fuel, so it's a short run.
All wiring and harnesses were reconnected as before. I do not have a manual, so
I don't know what I should be looking
for here. What's keeping the injectors from getting the electrical pulses?
Any help is appreciated.
Check your grounds, especially for the ECM - as well as fusible links. The
ECM controls the injectors by grounding them IIRC. I can't tell you any
specifics of which wires to check, but this might get the wheels turning and
you can then figure it out from there.
<Harrison> wrote in message> Replacement engine in '98 Blazer.
Thanks for replying.
All six injectors are getting a good ground, but I'm not getting anything on the
If I had a schematic, I could trace back to the proper pin(s) on the ECM and
possibly figure out which wire could be
giving me the trouble.
the injectors should have constant power , with key on in start or run
position, supplied through the ECM 1 fuse in the underhood bussed electrical
Each injector should have a pink wire this is the wire that leads back to
the UBEC and ECM 1 fuse
<Harrison> wrote in message> >> Replacement engine in '98 Blazer.
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