Need Help Finding/tapping Into Return Fuel Line

[domino_z]

Hi guys

Planning to install my GM flex fuel sensor + zeitronix ethanol content display and need to tap into the return fuel lines under the bonnet

Does anyone have a pic showing exactly where this is, and if i need any kind of special tool to remove the oem harness/plug?

I'll be doing this with the help of my local mechanic on sat - im assuming ill need extra hose length too, can anyone recommend a particular brand that will hold up under the pressure, i dont want any leaks

edit - is this it?

Edited November 21, 2011 by domino_z

[turboadam]

Nagtroc had pics up in a thread only last week i reckon - try search for thread on emptying the "gas" tank. <BR><BR>here ya go - <A href="http://www.nagtroc.org/forums/index.php?/topic/63088-how-to-siphon-gas/page__p__788634#entry788634">http://www.nagtroc.org/forums/index.php?/topic/63088-how-to-siphon-gas/page__p__788634#entry788634</A>

Edited November 21, 2011 by turboadam

[LSX-438]

Dom, it's the hose that connects to the BLUE connector in the pic (not the one the guy is holding)

You pinch the blue connector with your fingers and pull the hose up to disconnect (no special tools required) then the hose that comes off is where the fuel will come out. So either connect a hose to that (just buy some 15/20mm hose from hardware) and drain into jerry can. Just watch it when you pinch off the hose as a little fuel will splash out.

Also, be careful to make sure the blue clip doesn't come off the lower hose (it just sits there.. can easily come off and fall into engine bay).

[domino_z]

thanks for the tips mate

[LSX-438]

actually on 2nd look the hose the guy is holding plugs into the blue connector, but obviously he's attached something to drain fuel away. Anyway, disconnect the hose connected to the blue/green clip, and should be good.

[domino_z]

i was looking at that pic wondering where the hose went

i grabbed this pic from an injector diy so makes sense we was draining excess fuel

[zebra]

R35 ecu run flex fuel?, or are you running dual maps and just want to monitor the Ethanol content?

[domino_z]

or are you running dual maps and just want to monitor the Ethanol content?

yep exactly that

i find myself using solely caltext e85 now - with the lack of carbon build up, smoother running and extra power, i cant go back to 98ron

i have bought 2 20L drums of e100 from racefuels so the plan is to top up a few L's of e100 if the local caltex brew dips in the low 70s or below

also having the flex sensor all setup does allow me to run flex fuel maps in the future - im sure cobb are already working on this as ecutek have been

[zebra]

Will be interesting to see if any of the 98 blends have a hint of ethanol in them....if you ever go back to 98 lol

Factory ECU's have come a long way, does the ECU support dual maps, or do you flash/upload a new map from the Cobb unit?

[domino_z]

the ecu can hold up to 9 maps

[zebra]

Oh that was nice of Nissan lol

I wonder if the Dealership mechanics do the "you're a dick head map" to people they don't like, like some Ford dealers were doing with the BA XR6T's and de-tuning cars that had a few dubious warranty claims

[domino_z]

i dont think its the nissan oem s/w that allows this, but rather the software that the cobb flashes onto the ecu

look past the showy eyebrow work....

Edited November 21, 2011 by domino_z

[zebra]

That's cool!

lol @ eyebrows

[N1GTR]

Not sure if they're working on an R35 one (or maybe already released), but Link sell a great ECU that adjusts the maps on the go based on inputs from the ethanol sensor. Dom call Yavuz on 0296312470 and he can explain if you like

[domino_z]

im really happy with the cobb and the current willall tunes - i definitely dont want someone else tuning my car now that's it all sorted 100%

if cobb are working on a proper flex fuel system than i'll just wait for that

Edited November 21, 2011 by domino_z