Been stuck for a while, im coming to the pros. My truck will not start when
cold. no injector pulse. i can plug the block heater in and it will warm it
and it will start. below freezing without the heat its no start. below -20
the block heater cant keep up and no start also.
i have replaced the dist including icm and pick up coil...rotor, coil and
cap are all good. plan to rebuild my tbi unit to see if its an issue with
the fuel pressure regulator perhaps bleeding fuel and causing air and
freezing in the unit. any thoughts would be appreciated.
usually when we talk about injector pulse, we mean the ground signal
from the ECM driver for that injector. Is that you are talking about?
Cuz freezing fuel wouldn't change that.
If OTOH, you mean there is no fuel spraying, then you need to find out
whether you have injector pulse, and if you do, find out if you have
fuel pressure, and if you do, try just heating the TB with a hair drier
instead of the whole engine, to test your freezing theory.
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