Vi-Pec Disconnect Issue

[33GTRV]

Currently getting the datsun tuned with a vipec plug in and am having a strange issue wit the computer disconnecting at 5500rpm and full throttle. Any thoughts from the brains trust?

Setup is rb28, 272 9.85 camshafts, 2200cc bosch injectors, plugin Vi-pec, 6466 turbo.

[Guilt-Toy]

yeah i get this sometimes....

electrical interference and usb does NOT mix. and there is nothing you can do about it.

i had to tune a 850hp supra offline because of this, the way i did it was setup offline logging and after the run i would download the log and adjust then save then repeat...

I had no other choice as i only had an hour to tune that car, but there is another option... if you use the serial cable then it should usually fix the issues, i have one that i made a few years ago but it was in my skyline and not available to me at the time.

you can call your vipec dealer and they can order the serial cable for you, then you need a laptop with a 9pin serial port not a usb to serial converted.

ps: i hate usb. serial all the way.

[Guilt-Toy]

*good news everyone* (dr farnsworth voice)

because i am such a nice guy and not so lazy (not) I decided to do a search and i found a old email from back in 2009 from Ray Hall with the details you need to make your own serial cable.

you gotta change the cable to the CAN port on the board if using a plug in, if using the v44 or v88 you just put the cable on the can port.

good luck

GT

[33GTRV]

Legendary mate. Simon seems to think it is interference as its full load and near peak torque of the current state. He suggested a different plug and maybe shielding the ecu loom if possible.

[Guilt-Toy]

the supra disconnected at the same time as well....

[33GTRV]

Shielded the spark loom and changed to a different plug. Seems to have fixed the issue of ecu disconnect but we now have a slight missfire at 6000 rpm that sounds subtle. Car is officially giving me the poos.