95 blazer won't start

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#11

03-15-2013, 03:35 PM

rockp2

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Join Date: Nov 2011

Location: Pennsylvania

Posts: 1,135

Quote:

Originally Posted by Captain Hook

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.

I can't wait to receive my "Hook School for Blazers" diploma to hang on the wall

Thanks for the lesson.

#12

03-15-2013, 06:03 PM

Captain Hook

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Join Date: Mar 2009

Location: Belleville, Michigan

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Quote:

Originally Posted by rockp2

I can't wait to receive my "Hook School for Blazers" diploma to hang on the wall

Thanks for the lesson.

Welcome to the Blazer Forum School of Information, where tuition and diplomas are non-existant

#13

03-16-2013, 04:02 PM

big-b

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Join Date: Jun 2012

Posts: 4

I'm going to check the fuelk lines tomorrow, the only thing I can think is the rubber end that connects to the pump is somehow kinked. once I get that straight do you have any tips on how to check the ECM?

#14

03-16-2013, 04:18 PM

Captain Hook

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Join Date: Mar 2009

Location: Belleville, Michigan

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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.