1998 Chevy Astro fuel pressure

FARMERLOL

MEMBER
1998 CHEVROLET ASTRO
6 CYL
2WD
AUTOMATIC
179,000 MILES

I checked the fuel pressure and it read 24psi. No one in my area has a manual in stock. Fuel pump only has 3000 miles on it. Will run with fuel put in through mass flow sensor. Have new regulator but want tobe sure 24psi is enough? Ty

Tuesday, June 2nd, 2009 AT 8:00 PM

2 Replies

RASMATAZ

MECHANIC
75,992 POSTS

The fuel pressure should be 60-66psi yours is way too low.

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Tuesday, June 2nd, 2009 AT 8:18 PM

RICHINMD

MEMBER
4 POSTS

When you checked your pressure, did it immediately drop back to zero? If it did, you may have an issue with the check valve in your fuel pump or a bad fuel pressure regulator. I believe the bleed down pressure should be about 5 psi max. Also, if you just changed your fuel pump, you should change your fuel filter as preventative maintenance.

Simply put: 1. Change fuel filter.
2. Check your bleed down pressure.
3. If bleed down is excessive, get some brass fittings from your local hardware store and plumb into your fuel line to take a direct pressure reading from the pump. (Ensure that fuel is not going anywhere else other than the tank to your gauge)

Good luck!

P.S. I just went through all this a few weeks ago. 2 months on a new pump when it went out. My pressures were about the same.

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Tuesday, June 2nd, 2009 AT 10:45 PM