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What is the minimum fuel pressure required for a 1995 S-10 Blazer 4X4, powered by a 4.3 liter v-6 engine?

Tiny
LILBUNNYFOOFOO
  • MEMBER
  • 1995 CHEVROLET BLAZER
  • 110,000 MILES
Car wont start, but if I prime it it will, but only stays running by foot feed alone. It will not idle. I put a tester on it and cycling the key I have 65psi of fuelo pressure. Is that enough to push past the injectors?
Tuesday, September 13th, 2011 AT 7:43 PM

2 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
That is more than enough. It need a minimum of 55PSI but make sure it is maintaining enough pressure.

First eliminate all vacuum or air leaks in the system. You may have a bad IAC ( idle air control) but try cleaning the throttle body first. Remove the intake snorkel, have someone hold the throttle wide open for you and scrub the back side of the throttle plate and surrounding bore with an old tooth brush and some carb cleaner. Be sure to spray some into the small holes next to the throttle plate. That should help stabilize the idle. If it still has a problem, replace the IAC.
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Tuesday, September 13th, 2011 AT 8:44 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
With the spider fuel system, that fuel pressure is ok. What is the fuel pressure, engine running?

Clean the throttle-body and idle air control.
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Tuesday, September 13th, 2011 AT 8:47 PM

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