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Chevy Blazer Fuel Pump and Pressure Regulator Problems

208 messages,  Last post on Feb 20, 2013 at 1:03 PM

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What is this discussion about? Chevrolet Blazer, SUV

Messages Page 18 of 22

#164 of 208 2002 blazer fuel pump problem i think! by jondevils

Jul 01, 2010 (2:46 am)

Replaced fuel pump on my Blazer bc thought it was bad (which it was not). Have new pump in but still won't come on. Checked all relay switches and fuses they are all good. Checked connections to pump all are connected and each wire is getting fire to them. Blazer will turn over but will not start and fuel pump won't come on at all. Can put fuel in throttle and it will start but shut off as soon as it burns fuel off. Have no clue on what else could be causing the fuel pump to not come on. Please help lol. Please post on here and please e-mail me as well at jon_devilsyahoo.com

#165 of 208 1997 blazer starting problems by stealthny

Jul 07, 2010 (6:30 am)

I have a 1997 Blazer that I have been trying to fix for 6 mos. It just wont start on its own. I have repalced the pump ( which they said was bad but never pressure tested at the filter. when i pour gas down the carb it starts right up but will only run as long as the gas I pour in lats then stalls. someone told me that means the injectors are out of sinc. I am trying to replace the fuel filter now. nobody has tested the pump pressure other then holding down the FPV and saying there is alot of pressure there. anyone ever of the injectors being out of sinc

#166 of 208 2002 Blazer, floating gas gauge by skiextreme2

Jul 07, 2010 (12:11 pm)

2002 Blazer V-6, 4WD, auto. The gas gauge floats back and forth. Been doing that since a few months after I bought it 2 years ago. Started getting a double code about 8 months ago, (evap code, and I don't have the code here, but I think it was P0049 that suggested evap system). Could it be a vacuum (line) problem.
  
I have a friend with a 1998 (or 96) that has the same problem. They've replaced the fuel pump 3 times but it (the CEL) still happens.
I've replaced the gas cap and the purge valve but the codes keep coming back.
  
If it's happened to 2 vehicles, it's probably happened to more. Does anyone have experience with this problem?
  
Thanks, Rick

#167 of 208 Re: 2002 Blazer, floating gas gauge [skiextreme2] by jlflemmons

Jul 07, 2010 (4:11 pm)

Replying to: skiextreme2 (Jul 07, 2010 12:11 pm)
See the answer I posted to your question in Maintenance and Repair.

#168 of 208 Re: 2002 Blazer, floating gas gauge [jlflemmons] by skiextreme2

Jul 08, 2010 (8:58 am)

Replying to: jlflemmons (Jul 07, 2010 4:11 pm)
Do you know what page or have a link to the page?

#169 of 208 Re: 2002 Blazer, floating gas gauge [skiextreme2] by tidester

Jul 08, 2010 (10:47 am)

Replying to: skiextreme2 (Jul 08, 2010 8:58 am)
I believe this is it: http://townhall-talk.edmunds.com/direct/view/.ee95147/3526#MSG3526
 
tidester, host
SUVs and Smart Shopper

#170 of 208 2000 Chevy Blazer won't start / low fuel pressure by cramcam

Jul 31, 2010 (5:54 pm)

I have a 2000 blazer with 4.3l CSEFI engine that won't start. I can get it started with starting fluid, and it will run after that but it hesitates from time to time, nearly stalling.
 
After I shut it off, it will restart if I try within 10 minutes. After that, it won't restart without using the starting fluid.
 
I hooked up a fuel pressure gauge. When I turn the key and the engine is cold, it reads around 48-50 PSI. At this point it won't start. When I start it with the fluid and it's running, the pressure goes up to around 55 psi. When I shut it off and turn the key back on the pressure reads around 58psi. But if I leave it off for about 10 minutes that pressure drops back down to below 50 PSI again and it won't start again.
 
Is this problem my fuel pump? I have already replaced my fuel filter.
 
Any suggestions?

#171 of 208 It's got to be fuel related by blazersg

Sep 14, 2010 (2:45 pm)

My blazer won't start when it sits for over 6 hours. Hooked a pressure gauge up and it is 54 psi key on, running 56, and after 30 min it drops to 50. I have replaced filter and no leaks visible. Any help would be grateful.

#172 of 208 Re: It's got to be fuel related [blazersg] by gfd749

Sep 15, 2010 (6:14 pm)

Replying to: blazersg (Sep 14, 2010 2:45 pm)
have u check your fuel pump or fuel pressure regulator. if im no mistaken the 4.3 fuel system should be at or above 60 psi. im looking at the same problem on my 97 chevy c1500. im about to change my pressure regulator since i just replaced my fuel pump 2 years ago and the regulator is a hell of a lot cheaper. i'll try to let u know how it turns out.

#173 of 208 2001 chevy blazer by galanin

Oct 04, 2010 (7:51 pm)

i have a 2001 chevy blazer 4wd 2 dr changed fuel pump,fuel filter,cap and rotor sparkplugs . truck wont run have to pour gas to get it to run ,but this only last's for a few secs and we dont hear fuel pump prime like as before . any ideas

Messages Page 18 of 22

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