3.9 hotwire efi wiring questions

[Seight-V8]

hiya all,

Been converting my westfield seight from flapper to hotwire efi.

Engine now running, but i have 2 unanswered questions.

1. the efi warning light wire (black/yellow) from the ecu, then to the light, then does this go to earth?.

As the range rover haynes manual shows this goes to a (white) positive lead from the light.

so which is it earth, or positive, dont want to frazzle my new set up.

2. the manual sense resistor wire (orange/black) from the ecu to a 510ohm resistor, do i just wire the other side straight to earth.

many thanks for any help.

scott

[vdub boy 1]

Scott,

Not to sure on the ecu warning light - yet to wire mine up , but as far as the mannual sense resistor goes I wired it straight to earth - everything seems to work ok on mine.

cheers

Leigh

[Seight-V8]

hiya,

Are you sure this wire goes to earth and not to the a positive wire.

as here is a check from the range rover v8 manual

129. On models fitted with a manual gearbox, check the gear switch signal as follows. With the ecu multi plug connected and ignition on connect a voltmeter between pin 34 and earth.
A reading of between 1.4 and 3.5 volts should be obtained, and this takes into consideration the gearbox resistor of 510ohms.

And the wiring diagram from the range rover show a live feed from a white/red wire from the ignition swtich.

any ideas, how much difference this make if its not wired up.

thanks again

scott

[vdub boy 1]

Hmmm, will double check, and post back

Leigh

[alex]

Hi There
Standard Rover wiring colours White with red trace is +12v to starter solenoid.
This tells the ecu its cranking.
Would think you need it.
White wire is always +12v ignition feed. the ecu pulls up to 12v on the warning lamp and it goes out as 12v -12v =0v.
No experience of the tune resistor though.
Hope this helps.
Alex

[v84x4]

hi i did this to my racer a few weeks ago earth the 510 ohm resistor to a very good earth mine fired up on the first key turn