what can cause signal loss to injectors on 93 buick roadmaster estate tbi 350

Anthony Gilpatrick

Asked by Dec 06, 2015 at 11:02 AM about the 1993 Buick Roadmaster 4 Dr Estate Wagon

Question type: Maintenance & Repair

Am trying to solve stalling issue on
my uncles 1993 buick roadmaster
estate wagon 350 tbi first start it runs
fine but randomly after it starts it will
lose signal to the injectors everything
from the fuel pump to the injectors
are fine. But the electrical signal to
the injectors will randomly stop and i
am trying to find out why

3 Answers


Are you loosing injector main power or injector driver ground from the ECM. If your loosing main power it could be the ignition switch, if your loosing injector driver it could be the ECM, do you have any codes?


Cam and crank sensors, egr, injector or throttle control sensors if equipped

Anthony Gilpatrick

Stalling issue solved!! in this case it was throttle position sensor!!!

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