I'm new to FC's, and have a question. FC's are notorious for engine flooding, and one way to fix that is with a fuel cut-off switch. Ok, thats fine. Another thing, is that if you shut the car off, w/o letting the turbo cool, the oil can coke and destroy the turbo, thats ok as long as you install a turbo timer.

How do you make the two work together? I am looking to make sure I have all reliability mods in place before I start modding my T2 for performance (when I get one...I'm still shopping).

Thanks in advance!

BTW if anyone in SoCAL is looking to sell their T2, email me with pictures and info about the car and we can talk.

kep0ne@yahoo.com

 

The fuel cut-off switch is just a band-aid, not a fix. It's usually caused by dirty injectors (remove and have serviced) or if you're unlucky, low compression (rebuild). A turbo timer is not necessary. FC's have water-cooled turbos, which almost completely eliminate this problem if you use them properly. Because the core runs much cooler than with an air-cooled turbo, it doesn't get hot enough in normal driving to cook the oil on shut-down. If you've been driving hard, all you have to do is drive the last mile or two without using high or sustained boost and the turbo core temps will drop sufficiently. Also, turbos (and other engine bits) cool faster when driving at slow-med speeds than when idling, because of higher air and coolant flows. Since it's impossible for the engine to run without the fuel pump, you'd have to wait for the TT to turn the engine off before you flicked the switch, which makes the TT pointless.

 

thanks a lot! can anyone else confirm this?

 

I have a HKS TT and two fuel pumps, both on switches not because I have or had a flooding problem (band-aid) but it will make it harder to steal the car. Pump #1 is in the tank and pump #2 is on it's own 1/2" line. If your fuel pump switch is wired right (after the TT inline) the TT does leave power to the rest of the car (switch included) when your key is removed. Unless your fuel pump is literary running when your car is turned off, it will not flood. Before you restart your car you must trun the switch back off and on to aid with the flooding problem. In short you can have TT and a fuel cut switch working toghter. Hope this helps.

 

 

I have a band-aid, good security device and if your shizz floods like mine(sometimes) it really helps, also you can cut the engine with it so there isn't unburned fuel sitting on your spark plugs and so it won't be flooded when you go to start it the next time

 

Ok, let me try and understand this. I would have to wire the TT to the fuel pump, so that the TT will shut the pump off when the timer goes off? I'm not too clear on this...

 

If you want to use the fuel switch as a security device, your TT would have to have a relay in it that would deactivate the fuel pump when the TT shut the car off. Then pressing a button on the TT after turnin on the ignition could turn the fuel pump back on (this would probably leave the fuel switch out in the open, thus eliminating security)

If you are tryin to use it as a mechanism for avoiding flooding, then you've got another problem. However you can get a switch from Home Depot that when you press it, opens the circuit. This will cut power to the fuel pump when you press the button and restore power when you release the button. This way when starting the car, all you have to do is hold the button down and crank for a few seconds while the excess fuel is burnt then release the button when the car starts.

If you have an S5, you can avoid the switch (for flooding purposes) by flooring the car before turning the key. There is a built in routine to disable the fuel pump when cranking while the accelerator is floored. Once the car starts running, release the pedal.

Hope this helps

-Noch

 

Arpus is right it does have to be on a relay.I jumped into my pump under the driver side dash before it goes into a harness.I'm not 100% + but i think it's a black wire with a white stripe. And no you shouldn't wire your TT into your fuel pump. Harness it up normaly.The pump and relays are latter in line. When the TT shuts the car off it will also shut down your pump. When you get back in the car,you can flip your switch before you start it. Letting out any extra gas. when the car starts just flip the switch back on and go. Now all you need is a rx-7.lol. Good luck.....

 

my switch does open the circuit so I can cut the power to the pump while I crank it then it starts up on the fuel left in the chamber as soon as the engine starts flip it back on