1992 gmc Jimmy wont stay running
Asked by Rommster Jul 29, 2018 at 09:35 PM about the 1992 GMC Jimmy 4 Dr SLE 4WD SUV
Question type: Maintenance & Repair
My 1992 gmc jimmy with the 4.3 v6 TBI will start on
starting fluid and idle but dies after about 30
seconds. We have replaced the fuel pump and filter
and fuel pressure regulator. could it be the ICM?
5 Answers
It's possible but I'd go after the smaller items first like the ignition coil (could be breaking down with heat) and coolant temp sensor (could be giving a false reading). The catalytic converter could be plugging up once warm, the egr could not be closing all the way ect. Ect. Theres just so many possible causes. So it wont start up (or attemp to) without starting fluid?
yes it needs start fluid to get going but it will run on its own for 30 seconds or so then the injectors stop and it dies.
Have you used noid lights to confirm that its the injectors or are you taking an educated guess?
fuel pressure atv test port in line 55psi min to start it,
jimmy 1992 cpi 4.3 vortec vin code w will need 55psi at pump switch on inline test port
