HeatTreated

Picked up a barely used Walbro Fuel Pump the other day. (to replace the stock one with)
a Straight forward install, but I did have to extend the stock FP connecting wires and use some clip adapters to attach where a 'plug in/connector' might go onto the Walbro.
The only thing I did to relieve gas pressure before installing the FP, was pop the gas cap to let that pressure out.

After I put it all together I tryed to start it and no go.
So, I Primed the Fuel System by using the diagnostics box. I did that for about 30 secs and I could hear the Walbro making a pumping sound during that. (figured thats a sign that its working, am I right?)

Tryed to start again.. No go.
Figured I may have flooded it so I left it alone for a few hours and let my hands defrost.

Back out trying to start and nothing, doesnt even want to turn over. but I can hear the Fuel pump going for a few seconds after each attempted start. So I figure its getting power.

I used my tried and trued 'fixing a flooded engine' (even push started it.. ) techniques and nothing, didnt even want to start.

So now its the next day, and still no starting and Im worried.

is the slightly used FP bad?
Should i have wired it differently?
Is it simply Super Flooded?
Did I not Prime it enough? (although I did let it prime for about 1 minute just to make sure, on one attempt)

Rotarded

EFI relay plugged in??

Did you mix up the supply and return lines??

Snook

iTrader: (12)

count numbers 3 and 4 out almost for sure

its either 1, 2, you got your fuel lines mixed up, or forgot to reconnect something during the install. Nothing to be worried about just gotta go back and youll figure it out.

jspecracer7

Also, the walboro fuel pump doesn't like -6 volts. Wire up a -12 volts to the pump and see if that helps(It did for mine)

HeatTreated

great input.

I did mark the fuel lines, but got them so dirty on the re-install that I matched them up by what I thought where they belong.

Ill double check them. when I pull the spark plugs.

wylie

Have you tried starting motor with jumper wire installed in the diagnostic plug?

Also re-install stock pump and see if that works.

HeatTreated

day 3, Ok the Fuel Lines are NOT Crossed. And there was Fuel Pressure when I popped the gas cap, but no gas spilled out when I removed the fuel lines from the pump cap.

and I have the fuel pump back out and just dont see anything wrong.

Am I just really flooded, I mean its 3 days its been sitting and still wont crank over.

Snook

iTrader: (12)

dude dont be a newb why would it be flooded?

if you think its flooded then take out the fuel pump relay and crank the car for 7 seconds then take a minute break do it again then once more. Now put the relay back in and try to start it. Simple **** but its not your problem I dont think. So either your fuel pump is not wired correctly or its broken.

cavellm

For the lines, to triple check, they form L type shapes going from the tank cover. The line to the right as it makes it's L shape is closest of the 3 on a little plastic holder. The one on the left is in the middle of the 3.

To ensure the pump works, hook the pump up to the assembly but leave the tank cover off. Jumper the pump and the ground wire on the diagnostic box. Have someone turn the ignition on while the tank cover is off, and you can see/hear the pump working. Or just remove the pump completely and hook a 12v wire to the + terminal and ground it and see if it runs. Oh yeah, be careful to have no gas still in it, or the sparks will catch it on fire. Yes, that actually happened to me.

If it starts whirring and spewing fuel, it's good.

Have you tried removing the plugs to see if they're wet? Leading should be all you need to pull.

If they are, crank the engine for 2x for 10 seconds to get the gas out of the chambers. Put the plugs back in and see if it starts.

Then let us know.

HeatTreated

Well, IHOR at Gotham Racing
Just solved it.

He mentioned how it would sound like its still working even with Reversed Polarities to the pump.
I didnt know that and had cancelled that out when looking things over.

So I pulled it out.. and low and behold when I had extended the stock wires I had my black wire where the postive was (easy to do wrong, since the wires were sheathed) So I swapped em and just started it with no priming.. BAM started right up!

Big thanks to all you guys especially the Gotham Racing guys Steve, Ihor who always come through!

www.gothamracing.com

What a relief. simple mistake, yet so many other things to look at. glad its over.

Snook

iTrader: (12)

dude I still think its flooded go out and check! no need to advertise for a shop we were able to fix it here for you. BTW if you get a pump like the supra or nippendoso there is no need to extend wires and therefore it is impossible to mix up the possitive and negative terminals. Gotta love direct stock replacements. They also wont mess up your gas gauge readings and the experts Ive talked with say walbros are NOT a reliable pump

HeatTreated

READ IT AGAIN!

It starts fine.

And Ive dealt with the 'other' rx7 shops the Gotham Guys are worth the praise.

now go away Troll.

Snook

iTrader: (12)

I was joking about flooding. we told you about wiring right off the bat. Obviously you cant read. Dont ask for advise if you dont know how to take it

yeah im a troll I know nothing
Ive never helped anyone on here I just try to annoy them with my dumb info

cavellm

Positive = small terminal


Negative = big terminal


MARK THEM before you replace the pump!!!
Easy fix for a problem that shouldn't have happened

t-von

iTrader: (8)

Well even though the problem has been fixed, another way to check it would have been to extend the feed line in the engine bay into a bucket. Crank the engine over and see if the fuel shots out. Your bad wiring problem could have easily shown this. In the past when I had fuel problems, thats the 2nd thing I would usually check(fuses being the first).