engine flooding.....solution?

dubber91 · February 23, 2006, 08:06:44 AM

ive been told that there is a way to prevent flooding on warm start. It involves putting a switch around the fuel pump relay which you use to kill the engine when stopping. This bleeds the fuel from the system so upon warm-start it doesnt flood. Any ideas as to where it should go? should it go just between the relay and fuel pump, or before the relay? any ideas? sorry for all the questions recently!

Steve

Martiny · February 23, 2006, 08:41:02 AM

Steve, can you please tell us which car you have? Then we can try and help.

dubber91 · February 23, 2006, 12:18:47 PM

sorry, i thought you gathered from my other posts. Its a beetle with a 13b engine fitted.

1988 6 port

Martiny · February 23, 2006, 02:32:28 PM

Ah, ok, so do you even have fuel pump relay then?

On the EGI RX-7, I think they put a switch to intercept the power to the pump.

What a minute, do you have injection or carburettor?

dubber91 · February 23, 2006, 06:23:43 PM

its injection...im pretty sure i have the fuel pump relay installed....

Martiny · February 24, 2006, 07:30:38 AM

Ok, on the FD the fuel pump doesnt actually stop the pump, it switches it from high to low speed.

I guess you need to find the relay, and then figure out which wire feeds the power to the relay, then we can intercept that.

Is the injection the standard Mazda system, and from which car?

dubber91 · February 24, 2006, 08:05:59 AM

its a 1988 rx7 the engine was removed from. Standard ECU ETC.

I guess thats how i do it...i have an FIA approved electric cut off switch just laying around so i figure that will do the job.....

Steve

dubber91 · February 24, 2006, 06:09:05 PM

as far as i am aware, these are the only two relays on my car......Both of which have a fair few wires going to them....

if so, i dont use a relay......can i just put a switch in line with the fuel pump power supply?

Cheers

Steve

Martiny · February 25, 2006, 06:56:25 AM

Yes that should be fine. A relay is to stop the switch wearing out. I think the FIA switch should work fine, though.

jon haines · February 25, 2006, 01:40:19 PM

the two black wires above the silver relay look like the earths to those relays, if so then thats the best place to interupt your supply as a break here will cause the relay to drop out but wont carry any heavy load as it is only the switched feed (about 0.3 of an amp) ok for any switch to handle. if you interupt the main feed the switch will have to cope with much more load.

dubber91 · February 26, 2006, 04:40:35 PM

which one is the fuel pump relay?

Steve

jon haines · February 26, 2006, 07:37:42 PM

sorry, dont know that one of the top of my head. i would go for the silver one though, all you need to do is run your car and pull the relay and if its the right one it will cough and stall after a few seconds when the fuel runs out. if its the right relay be sure to trace the black wires to the relays before you cut to make sure that is were they go as the picture is a little fuzzy.

engine flooding.....solution?

jon haines

jon haines