95 blazer won't start
#11
Yup, 95 and older "W" engines have CMFI. It has one injector that is batch fired. It squirts fuel to all cylinders simultaneously each time any cylinder fires, (3 times per crankshaft revolution). Fuel pressure and leakdown specs are higher on 96 & newer CSFI systems because each injector is only fired once every two crankshaft revolutions. Their reason for increasing pressure is that CSFI injectors have a greater chance of plugging up from not squirting as often.
#12
Welcome to the Blazer Forum School of Information, where tuition and diplomas are non-existant
#14
The ECM has nothing to do with the excessive fuel pressure problem that you're experiencing.
Remove the return line, (5/16") at the rear of the intake manifold and attach a piece of rubber hose to the line that goes back to the tank. Remove the return line from the fuel pump module. Blow into the rubber line, there should be very little, if any, resistance.
Remove the return line, (5/16") at the rear of the intake manifold and attach a piece of rubber hose to the line that goes back to the tank. Remove the return line from the fuel pump module. Blow into the rubber line, there should be very little, if any, resistance.
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