Fuel Pump Relay question

[Tony Hoffman]

The fuel pump relay turns on when it sees the 4.5V signal from the hall sender. So, when you shut off the engine, if it happens to line up that way, the next time you turn the key on the relay will trigger. They did this as a safety measure, so if the car flips over and breaks a fuel line, the pump won't "fuel the fire". If it starts on fire, that is.
Anyhow, it sounds like it's working alright. If you want, get a short piece of wire (12 GA or so) and put a male spade on each end. Plug it into the two terminals that form a "T" where the relay normally plugs in. This will guarantee the pump is getting power.
 
Tony Hoffman

Chris Hall <badcomrade at gmail.com> wrote:
In trying to diagnose my stalling / no start then "all the sudden back
to normal" problem, I took the cover off of my Fuel Pump Relay to
watch it's operation.

I thought that -every- single time the key is switched to the "on"
position, the little electromagnet switch should close, but it doesn't
do it -every- time. It just does maybe once out of 5 times. Is this
the way it's supposed to work? Maybe if the system is already
pressurized enough, there's no reason for it to switch on until the
engine is going?

OR, does that mean that my relay (who's solder points I've gone over
with a magnifying glass) is working intermittently?

I'm gonna try to wrap a rubber band around the switch to keep it in the
"on" position (essentially making it a jumper) to see if I can get the
car to stall that way...

		
---------------------------------
Do You Yahoo!?
 Yahoo! Small Business - Try our new Resources site!