ok i took out the fuel pump relay and ran the car for about 10 minutes , pulled the top curved hose on the fuel fiter and at least a half gallon of gas came out and kept comming out .... didn't stop. i put the hose back on the filter so it wouldnt leak anymore...
is this normal... i thought the gas was supposed to stop comming out after a while ?

 

the filter could be the lowest point in the system. If you just idled the car, the fuel return line could have been 'full', which would make it act like a siphon when you unplugged the main line at the filter. This would cause it to pretty much empty your gas tank out of that hose.

That's my best guess... Are you sure you pulled the fuel pump relay? If you did, try parking it uphill / jacking it up a bit...

-manolis

 

i never did pull the relay when i did my fuel filter. just jacked the back end of the car up and disconnected the hoses. i had golf tees ready to plug the hoses up w/. had a little gasoline come out but i was able to cover the hole pretty quick. it shouldn't be that bad.
nick

 

Did you open up your gas cap to vent the tank? I made that mistake when I was changing my FPD, and gas just kept pouring out. I couldn't figure it out since the line was higher than the tank... But then I found out my tank was a little bit pressurized.

Also, if you disconnected your fuel pump relay, the car should not run for very long. Something doesn't sound right.

 

Can't believe the car ran for 10 min after removing the relay. If you waited till the tank was 1/4 or less and took gas cap out then there shouldn't have been much fuel at all.

 

Something doesn't sound right when I did mine it ran for maybe 10 seconds after i pulled the relay and died. Think you may have pulled the wrong one.

 

Like everyones saying, should die within 10sec, but I also had to plug the hole after removing the hose. no pressure it just siphones.

 

I just jacked up the backend, took the fuel cap off, and then went to work on the fuel filter. Only a small amount came out on me.

 

well i guess the problem is that i didn't take off the fuel cap? ill try that.

i don't know why it ran for so long too.... i even reved it up a bit but maybe it was because my gas tank is a little pressurized like you guys said ? and that i did not remove the cap.

thanks for the help ill post what happens in a little while

 

I have always found it much easier to remove the fuel pump fuse in the driver's kickpanel as the relays are sometimes hard to pull out.

And the car will run with the fuel pump relay pulled (that one's up front under the stock air box crossover). With the fuel pump relay pulled the fuel pump will still run, it will just run at low speed (our cars have 2 speed pumps).

If you pull the circuit relay by the battery, then the fuel pump will not run at all.

 

Same here. Pull fuel pump relay (that thing was a BITCH to get out!) ,10 sec run max, then nice die off. Opened tank, and almost no fuel dump. I relocated my fuel filter to the area right next to the steering column with one of those trick K&N cleanable element filters. That was 2000 miles ago, and I'm going to pull it this weekend to see how dirty it has gotten. I've measured the temps in this location, BTW, and it barely goes over ambient most of the time. Just not a whole lot to heat it up over there. So I'm not worried about vapor lock, and others have noticed the same thing. I'll let 'yall know how it went if yer interested...

 

ok i just finished putting on the filter, but didnt start her up yet.. the problem was the gas tank. it was pressurized just like you guys said. i cant belive i didnt think of it.

But anyways does anyone have any idea why my car ran for so long with the fuel pump relay out? Damon B said it should run but other's says theirs shuts off 10 seconds later? who is right ?

 

by the way DamonB thanks for that write-up on changing the fuel filter it was a big help.
here is the link for anyone else changing their filter:
https://www.rx7club.com/forum/showth...threadid=15128

 

I am right

People routinely confuse the relays. The actual fuel pump relay is located up front on the bumper support inside the long narrow relay box and says "fuel pump relay". There is also the fuel pump fuse in the interior fuse box and the circuit opening relay inside the square relay box on the driver's side fender.

The FD fuel pump is a two speed pump and power is supplied to the fuel pump via one of two routes: Power comes from the circuit opening relay, through the fuel pump resistor (low speed) and to the pump. OR power comes from the circuit opening relay, through the fuel pump relay (bypasses fuel pump resistor; high speed) and to the pump. With the actual fuel pump relay pulled the fuel pump will still run but only at low speed! The car will idle all day long with the fuel pump relay in your hand! This is a fact! Refer to schematic B-1a on page Z-28 for proof of this.

The correct way to defeat the pump is to pull the fuse or the circuit opening relay. Pulling the fuel pump relay still allows the pump to run at low speed.

 

thanks for the info DamonB

 

Since everyone agrees that this is a pain in the but, I assume Mazda must be charging a fortune for the operation.

Does anyone know how much the dealer wants to replace the filter?

 

Sorry! I meant fuse! Three lashings with Honda spark plug wires! DamonB B right

 

I checked the price of the replacement with my local Mazda dealer. They want $210 for the replacement, $48 of which is the filter itself. I am guessing this means that Mazda thinks the job will take 2.5 hours?

Seems steep.