'95 Chevy S10 Blazer - Losing Fuel Pr...

'95 Chevy S10 Blazer - Losing Fuel Pressure

Posted in the Chevrolet S-10 Forum

Tom K

United States

#1 Mar 11, 2010
I have a 95 Chevy S10 Blazer. Replaced fuel pump, sending unit, and filter. It looses fuel pressure at shut off - falls to nearly zero within 1 minute. Once started - runs good - lots of power. Any ideas?
Ron

Logansport, IN

#2 Mar 24, 2010
Sounds like the check valve built into the pump outlet is bleeding pressure off.... or the fuel regulator is bleeding off?
Amanda

United States

#3 Jan 19, 2011
How much fuel pressure does a 95 Chevy S-10 Blazer needs to have?
Amanda

United States

#4 Jan 19, 2011
How much fuel pressure does a Chevy S-10 Blazer Vortec 4.3 need to have?
pelfrey

Germantown, OH

#5 Apr 19, 2011
Amanda wrote:
How much fuel pressure does a Chevy S-10 Blazer Vortec 4.3 need to have?
it runs anywhere from 55-63
Mr James

Clarksville, TN

#6 Jan 6, 2012
95 chevy blazer 4.3. wont start after setting for 2 or 3 hrs. but will start with a lite shot with starter fluid to the throttle body. replaced fuel filter, plugs, wires air filter. fuel pressure with key on and engine not running is 56 psi but drops to 46 psi in 20 minutes. with engine running its a steady 56 psi. when you turn engine off pressure holds for a few minutes but drops to 42 psi in about 30 minutes. trying to figure out if its the pump or regulator. what do y'all think?
joshcnc

Houston, TX

#7 Nov 1, 2013
Mr James wrote:
95 chevy blazer 4.3. wont start after setting for 2 or 3 hrs. but will start with a lite shot with starter fluid to the throttle body. replaced fuel filter, plugs, wires air filter. fuel pressure with key on and engine not running is 56 psi but drops to 46 psi in 20 minutes. with engine running its a steady 56 psi. when you turn engine off pressure holds for a few minutes but drops to 42 psi in about 30 minutes. trying to figure out if its the pump or regulator. what do y'all think?
My cousin inlaw has the year and model with the same thing as well. Someone please help us understand what it takes to get it right.

Tell me when this thread is updated:

Subscribe Now Add to my Tracker

Add your comments below

Characters left: 4000

Please note by submitting this form you acknowledge that you have read the Terms of Service and the comment you are posting is in compliance with such terms. Be polite. Inappropriate posts may be removed by the moderator. Send us your feedback.

Chevrolet S-10 Discussions

Title Updated Last By Comments
1991 chevy s10 4.3 suddenly died and engine was... 12 hr StenTAHOE 1
2001 Chevy s10 2.2 Wed Epicrolls96 1
1997 s10 Will Not Start In Rain (Jan '09) Tue Robbclassics 12
Ghang out engines Jan 15 Mark hernandez 1
Starts then dies and battery is drained (Jul '12) Jan 15 wessly2813 6
Radiator drain plug Jan 14 Jay koski 2
98 S10 Wont Start HELP!!! (Feb '09) Jan 14 G-man43 115
More from around the web