Wayward Son
10-15-2007, 10:00 PM
Car isn't getting fuel. Need to eliminate the relay as the cause. I've found the relays behind the glove compartment but of course there is no sort of label to tell which of the 5 is for the fuel pump. Anyone here happen to know, even which column it's in?
I'm predicting it will turn out to be the pump itself, seeing as how replacing it means I have to pull the gas tank out. Fun job to do in the driveway...
stevemc1
10-15-2007, 10:29 PM
Isnt the labels on the fuse cover? Get a Clymers or other book for that model, it will tell.
jstbecauz
10-15-2007, 10:50 PM
Fuel pump relay is located at position "H" on the relay box. Starting from top right (A) working left then going from left to right on the bottom.
jstbecauz
10-15-2007, 10:58 PM
Maybe this is more clear...
divehard
10-15-2007, 11:23 PM
Greg,Greg He's our man!!!:bounce::bounce:
Wayward Son
10-15-2007, 11:37 PM
Maybe this is more clear...
That's it, only rotate 180 degrees. No, there is no label, as a said in my 1st post.
Thanks a bunch, now I know which socket to mess with. Though I still think I'll be dropping the gas tank out this weekend to get at the pump.
Roland
10-16-2007, 06:10 AM
If you want to test the fuel pump just look follow the main harness where it comes out of the cowl, there will be a short (2 - 3 inches) single wire red lead apply 12v and pump should run if the juice is getting there otherwise you need a pump.
The pigtail is usually somewhere along the harness GM put them in various places. Will be a flat spade terminal.
The easiest way is to find the harness at the tank and probe the gray wire with a test light (unplug and touch terminal) while watching the light have someone cycle the key - light should come on for a couple seconds, if not its a Relay/PCM problem. Also some of the older cars will have no fuel pump signal to the relay till oil pressure builds up (after the 2 second prime).
jstbecauz
10-16-2007, 07:37 AM
If you find that you have fuel pressure then you can check a couple of other things. I have attached the fuel circuit below. But a couple of other things if this is not it.
They have an inertia switch. If you find that you have raw fuel pressure from the pump. I believe that that one is built into the oil pressure switch, the vehicle needs atleast 4lbs of oil pressure in order for the switch to trigger, so check you oil level, probably not it, but check it anyway.
High voltage from the TPS with closed throttle, should be about .5-.7 with closed throttle.
High resistance at coolant temp sensor
If it starts then stalls, try disconnecting the distributor bypass line, if it starts then stays running then you have a pickup-coil problem.