95 Blazer starts and stalls

TDBOWEN

MEMBER
1995 CHEVROLET BLAZER
168,000 MILES

I have a 95 blazer 4.3 vortec, cmfi, edI. My fuel pressure is 60psi and I have spark (I used a test light pooked into the rubber spark plug boot) I went to test my fuel injectors by testing for power and the pulses using a test light(I dissconnected the wirering harness that go's to the injecters) I got a steady light on one wire and nothing on the other. So I was unplugging other sensors to see if I could get a pulse and then I got no power at all going though the one wire so I plugged every thing in and it started right up and ran great for 5 min. Then just shut off, I checked my wire and it had power I tryed starting it a few times and my power went off in the wire agine so I plugged it in and it started right up and died after 3 or 4 seconds I can repeat this over and over aging. Im confussed now. Oh my problem was it felt like it was running out of fuel so I pulled over and it died so I towed it home and started checking thing out.

7 Replies

RASMATAZ

MECHANIC
75,992 POSTS

You got me confused here-Do you have a TBI or the CPI-spider assy?

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Friday, January 29th, 2021 AT 1:45 PM

TDBOWEN

MEMBER
4 POSTS

Its a central multiport fuel injection according to the picture in the book. It does connected to OBII even though its a 95. Im learning as I go so if I dont know what Im talking about Id say TBI, but the picture in the book looks just like my motor (its the only one with the Vortex plenum on the top) and calls it cmfi. That wire I was talking about its supose to be the injector harness(wireing) that goes to the injectors witch I cant get to unless I take the air intake plenum off according to the book. Thank you soooo much for any advise or point me in the right direction I dont know what I should check.