1999 Chevy Blazer Cuts Out on Acceleration

CHEVROLET BLAZER
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KEITH66
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  • 2 POSTS
I have a 1999 chevy blazer, 4.3 l with 130000 miles on it. It cuts out upon acceleration and I have been racking my brain trying to figure out why. The fuel pump is fairly new and I believe that I replaced the press reg too. Fuel filter, plugs, wires, cap, rotor, and coil are all new. Last summer I had to replace the intake gasket and while it was apart I cleaned eveything real good. Today I cleaned the IAC and the pcv. The only thing I can think it could be is one or more of the injectors but how do I check them on this type of system (CSEFI)?
Mar 26, 2007 at 6:29 AM
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BOOTDOG
  • ✓Experienced Mechanic
  • 665 POSTS
you'll need to hook a scan tool using the OBD-II connector, and hook a fuel pressure gauge to the fuel rail. using the scanner you can pulsate the injectors one by one and monitor the gauge to see if they're operating properly. i know everyone doesn't have a scanner, but that the way to go.
Mar 27, 2007 at 3:18 AM
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KEITH66
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Thanks for the tip Bootdog. Unfortuneatly I will have to take it to some one because I do not own a scan tool.
Apr 1, 2007 at 1:52 AM

Suggested Repair

Connect an OBD-II scan tool and a fuel pressure gauge to the fuel rail, then pulse each injector one at a time and watch the gauge to confirm proper operation. Have a shop perform the test if a scan tool is not available.

Conversation Summary

A 1999 Chevrolet Blazer 4.3L with 130,000 miles cuts out on acceleration despite a fairly new fuel pump and recent fuel filter, plugs, wires, cap, rotor, coil, and believed pressure regulator replacement, plus intake, IAC, and PCV cleaning. The owner suspects one or more injectors on the CSEFI system. The expert advised using an OBD-II scan tool to pulse each injector while monitoring a fuel rail pressure gauge. The owner will take it to a shop because they do not have a scan tool.

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