1992 Chevy Astro Relays

BUDE106

MEMBER
1992 CHEVROLET ASTRO

Electrical problem
1992 Chevy Astro 6 cyl All Wheel Drive Automatic

Hello; I am having problems starting after the engine has been running for awhile. I replaced the feul pump relay's. There are 2 of them, they are one the passenger side under the hood on a bracket. There is another relay in between the feul pump relays. I am asking what the middle relay is for?

updated 6-1-09
Hello; I can start the engine with starting fluid/ but it wont start on its own.

1 Reply

2CARPRO JACK

MECHANIC
11,533 POSTS

My software is alittel vague about that, but it looks like the only relays on the firewall are the fuel pump and the A/C clutch relay. Some of those used a"pulse dampener" between the fuel pump and the sender assembly. When the dampener goes bad it will bypass pressure right back into the tank causing hard start and other driveability issues. The only way to tell if you have one is to drop the tank to see. If there is anything besides a piece of rubber hose (fuel injection hose, not reg fuel line) then replace it with FI hose and it should take care of it. This can be verified with amanual fuel pressure gauge. Also I strongly suggest putting a new A/C Delco pump in it while the tank is out if it has never had one done before