1997 Chevy Blazer no start

WAGAWAGA

MEMBER
1997 CHEVROLET BLAZER
6 CYL
4WD
AUTOMATIC
189,000 MILES

This blazer has a vortec. The fuel pressure wont stay at where it should it drops slowly all the way to 0 psi. I pulled the tank out to see it the pump had any problems it seems fine upon bench test. I changed the pressure regulator as well it stays running if I pour gas through the throttle body. Im at a loss but maybe a fresh mind can help me through the tunnel vision

Tuesday, March 24th, 2009 AT 2:35 PM

3 Replies

JDL

MECHANIC
16,098 POSTS

Hello, what were the fuel pressure specs, did you use a gage? Do you have the spider fuel system?

Just for kicks, I have bench, no load tested pumps that I knew were faulty. I layed it on the bench, hooked up battery voltage--ground. I was surprised how much gas that little pump held, it throwed gas all over me and everything else, I only did that once. On that particular pump, the brushes were wore down to the nub. I can't tell you the pump is faulty without testing. One you build pressure by cycling the key, you might block or clamp the supply line somewhere, see if the pressure holds?

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Tuesday, March 24th, 2009 AT 3:09 PM

WAGAWAGA

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1 POST

Is there a way to test my regulator? I tested with a gauge and it does not hold pressure but can that mean that the regulator is bleeding the fuel to the return line?

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Wednesday, March 25th, 2009 AT 11:16 AM

JDL

MECHANIC
16,098 POSTS

I thought that was a new regulator? You can block or clamp the return line, after you cycle the key. You shouldn't deadhead it more than a few seconds.

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Wednesday, March 25th, 2009 AT 12:05 PM