errors when logging with usb interface

160 And 8192 Baud Aldl
Jervies
Posts: 199
Joined: Wed Nov 09, 2011 5:35 pm
cars: Vt v6 wiith a gt35/40 turbo e85 399rwkw
Mazda e2000 with a cammed vx ecotec motor
Location: Victoria

errors when logging with usb interface

Post by Jervies »

So as the tittle states im using a usb logger connected with 6" of cable from the pins of the ecu, the logging was very hit and miss and now i cant log when the car runs, it starts to error and still works for 10 seconds then nothing. when the car isnt running not an issue zero errors. ive moved the connection from on the pcb itself to the pins trying to fix the issue but still no go. Does anyone have any suggestions as to where to start looking?
*Every time this happens i have to close tunerpro and reopen to clear the errors and be able to log again.
this is on a vr 5lt ecu, 11p and nvram with ose plugin.
User avatar
vlad01
Posts: 7780
Joined: Mon Oct 08, 2012 6:41 pm
cars: VP I S
VP I executive
VP II executive
VP II executive #2
VR II executive
Location: Kyneton, Vic

Re: errors when logging with usb interface

Post by vlad01 »

where is the ignition coil located?
I'm the director of VSH (Vlad's Spec Holden), because HSV were doing it ass about.
Jervies
Posts: 199
Joined: Wed Nov 09, 2011 5:35 pm
cars: Vt v6 wiith a gt35/40 turbo e85 399rwkw
Mazda e2000 with a cammed vx ecotec motor
Location: Victoria

Re: errors when logging with usb interface

Post by Jervies »

on the manifold of the motor, ecu is on passenger floor
User avatar
vlad01
Posts: 7780
Joined: Mon Oct 08, 2012 6:41 pm
cars: VP I S
VP I executive
VP II executive
VP II executive #2
VR II executive
Location: Kyneton, Vic

Re: errors when logging with usb interface

Post by vlad01 »

Jervies wrote:on the manifold of the motor, ecu is on passenger floor

the stock location?
I'm the director of VSH (Vlad's Spec Holden), because HSV were doing it ass about.
Jervies
Posts: 199
Joined: Wed Nov 09, 2011 5:35 pm
cars: Vt v6 wiith a gt35/40 turbo e85 399rwkw
Mazda e2000 with a cammed vx ecotec motor
Location: Victoria

Re: errors when logging with usb interface

Post by Jervies »

its on a sbc, just sitting behind the carby, ignition module is on drivers guard
User avatar
vlad01
Posts: 7780
Joined: Mon Oct 08, 2012 6:41 pm
cars: VP I S
VP I executive
VP II executive
VP II executive #2
VR II executive
Location: Kyneton, Vic

Re: errors when logging with usb interface

Post by vlad01 »

Not sure if its the same problem but I have experienced the exact same problem with VN-VR 5L where the coils was relocated to the shock tower and the further away the coil was from the loom driver side the less the errors. In the stockish location the errors went away. Seemed like RFI from the ignition system was causing interference with the harness.
I'm the director of VSH (Vlad's Spec Holden), because HSV were doing it ass about.
Dylan
Posts: 3355
Joined: Mon Aug 02, 2010 6:35 pm
cars: VR Commodore V8

Re: errors when logging with usb interface

Post by Dylan »

Try reversing the echo setting in tuner pro. If no better it's an interference problem most likely. Try a USB lead with a ferrite bead on it
Jervies
Posts: 199
Joined: Wed Nov 09, 2011 5:35 pm
cars: Vt v6 wiith a gt35/40 turbo e85 399rwkw
Mazda e2000 with a cammed vx ecotec motor
Location: Victoria

Re: errors when logging with usb interface

Post by Jervies »

well the coil is surrounded by the loom so may be an issue there, its quite a big coil too. ill try different locations see if that helps.
already have the ferrite bead but could try adding another or putting before the usb interface maybe.
doesnt want to connect at all with echo off. no bcm or anything
kojab
Posts: 440
Joined: Sun Mar 22, 2009 11:52 am
cars: VT V6 supercharged in a corolla
Location: Sydney
Contact:

Re: errors when logging with usb interface

Post by kojab »

I have found that some aftermarket sparkplug leads can cause this issue. Replaced them with standard Holden leads and fixed the issue.
User avatar
Jayme
Posts: 2585
Joined: Sun Mar 01, 2009 8:59 am
Location: North Coast, NSW

Re: errors when logging with usb interface

Post by Jayme »

You just reminded me of another carby motor i converted. Some of those old motors had non-resistive plugs and solid copper leads. Very bad rfi comes from them. Swapped to resistive plugs (usually have an 'r' in the part number) and resistive leads and the rfi problem i had went away
Post Reply