VEMS w/o ISV diode harness.

[popdemonic]

Hey Mates,
I just purchased VEMS from my friend.the VEMS kits was originally belongs to
Dave Jones at S-linemotorsport.it seems the ISV harness adapter was
missing firstly so I asked my friend and he was told by Dave Jones.the early version
of VEMS didn't use ISV so there was no kinda ISV adapter with the kits.The point
is Can i still running VEMS w/o this adapter plug-in the ISV?I just can't wait to remove
the Motronic and get it started with VEMS.

My car has GT2871/K26 A/r .63 ,Ford green injectors,Wagner RS2 'EM

PS.My VEMS has additional PS2 port(later VEMS PS2 port is NLA)

[A80Avant]

you can run it without the ISV. All you do is disable the IAC settings and just run it on ignition based timing idle only, which will keep your idle slightly higher than normal(around 1000ish rpm), Ideally you can order the adaptor from marc swansson (efiexpress) and you will then be able to put in some idle settings that will work.

make sure your vems has the latest vemstune/firmware as it will run much more smoothly this way

have fun!

[Billman]

You can also run the ISV without the diode but also install a diode to your harness and/or buy an adapter cable from Marc.

[popdemonic]

2 thumbs up for both of your inputs mate!Well,after my country gets through of flooding crisis.
the project will begin as soon as possible.I just try to keep my car on the high ground during this couple weeks.

[popdemonic]

start the engine today,idleis way just fine but i couldn't get the o2 wideband calibrate.
adjust the constant from 0-255 but no changes on the % on the gauge(to reach 20,9%
regarding to the instruction).the needle just laid down on the left of the gauge.i just connected
everything as is.since the harness was previously running on the car with GT30R .
all i did is cut 5 of the wires on the o2 wideband sensor end and "fish" them through the grommet
on the firewall and connected the 5 of wires back since i couldn't hook up the plug of the o2 wideband
through the grommet.here's the photo of the 5pins connector.this's what they came as is.
the color of the wires doesn't match regarding to the website.

[QuattroFever]

i have the same trouble. no matter what figure i enter i get nowhere near 20.9%

when i had an mot test i checked his lambda readings against mine and it was pretty close so I left it but it's always bugged me that the calibration isn't correct as per the manual.

[dkw_dude]

Check wires one by one with a digital multimeter and schematics and correct the colour coding on the schematics. Do you have a link to the procedure? I calibrated my WB when it was new, was reasonable easy from memory.

[Billman]

Was the sensor used? If yes then maybe the calibration is not possible because of residual fuel on the sensor internal.

[popdemonic]

The sensor is used.Since the color of wires doesn't match regarding to the website,i checked them one by one,they matched on each pin#.

one thing ,once i run the VEMstune program.there's pop up asking me to update the firmware 1.1.44. don't know if this's relating to unable

to calibrate the WBO2?Maybe the sensor gone bad?

[popdemonic]

here's the pin out on both terminals(oval and 5 pins connector)please kindly verify for me.I checked
on the pin out order from the website.It looks like there's nothing wrong on them.