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Westy77
Samba Member
Joined: September 20, 2024
Posts: 5
Location: Guelph
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 Posted: Sat May 17, 2025 1:35 pm Post subject: Help with CB Performance EFI |
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I bought a '77 Westy this winter and it's running rough. The engine runs a fuel pump with its own computer. I know very little about cars.
The bus is runs with a lot of backfiring and when I last had it on the highway, it lost power. I changed out the spark plugs with no effect.
The computer is from CB Performance and I downloaded the software (2010) and the manual from their website. I bought a nine pin to USB cord from Amazon and I run my computer in compatibility mode for Windows XP.
I can load the Quick Tune software and it shows data from the computer.
The air-fuel ratio is showing 19 when idling which is really high.
There are two slider bars; Acceleration Enrichment and Cooler Enrichment (warm up).
After about 30 seconds, the screen blinks and all the meters go to zero.
My questions:
1: How would I lower the Air to Fuel ratio?
2: Is there a better solution here?
Thanks!
Last edited by Westy77 on Sun May 18, 2025 2:49 pm; edited 1 time in total |
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SGKent 
Samba Member
Joined: October 30, 2007
Posts: 42955
Location: at the beach in Northern Wokistan
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| Posted: Sat May 17, 2025 2:22 pm Post subject: Re: Help with CB Performance EFI |
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you are running what OS?
_________________
 Canned Water - the new California approved parts cleaner (except in a drought in which case rub it with sand).
George Carlin:
"Most people don't know what they're doing, and a lot of them are really good at it."
Skills@EuroCarsPlus:
"never time to do it right but always time to do it twice" |
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Westy77
Samba Member
Joined: September 20, 2024
Posts: 5
Location: Guelph
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| Posted: Sat May 17, 2025 4:17 pm Post subject: Re: Help with CB Performance EFI |
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| SGKent wrote: |
| you are running what OS? |
On my laptop is Windows 11, but I'm running it in compatibility mode as Windows XP as that's the latest version that will work with the Quick Tune software from 2010. |
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mross
Samba Member
Joined: September 11, 2003
Posts: 60
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| Posted: Sat May 17, 2025 4:49 pm Post subject: Re: Help with CB Performance EFI |
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| Did it run better before? How does the fuel filter look? blocked? |
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SGKent
Samba Member
Joined: October 30, 2007
Posts: 42955
Location: at the beach in Northern Wokistan
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| Posted: Sat May 17, 2025 5:13 pm Post subject: Re: Help with CB Performance EFI |
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I had to set up an XP computer to run some XP programs. The compatibility mode has never worked well for me. If your laptop has the ability to run a virtual machine you might be able to run it on a virtual XP machine. Most XP computers were 32-bit so sometimes newer OS at 64-bit don't always work with 32 bit software even though there is a 32-bit emulator. Some XP programs were even 16-bit.
I found this thread but I doubt is the links work. You might have to chase the software elsewhere - maybe https://www.aemelectronics.com/support/software_do...L6L-UTri0E
Net 4 is a requirement too
This is from Google AI
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.NET Framework 4 is not officially supported on Windows 11. While .NET Framework 4.8 is built into Windows 11, it's recommended to migrate to newer versions of .NET if possible. If you need to run applications specifically designed for .NET 4, you'll likely need to use Visual Studio 2019 or 2022 with the appropriate targeting packs.
Elaboration:
.NET Framework 4 End of Life:
Microsoft officially ended support for .NET Framework 4.0 on January 12, 2022. This means it no longer receives security updates, bug fixes, or general support.
.NET Framework 4.8 on Windows 11:
Windows 11 comes with .NET Framework 4.8 pre-installed. This version is backward-compatible with applications designed for earlier versions of the .NET Framework, including .NET 4.
Visual Studio 2019/2022 for .NET 4 Projects:
If you need to develop or work with applications specifically designed for .NET 4, you'll likely need Visual Studio 2019 or 2022. You may need to install the .NET Framework 4 Multi-Targeting Pack to allow targeting older versions.
Alternative Options:
If possible, it's highly recommended to migrate your applications to a newer version of .NET, such as .NET 6 or later. This ensures you're using supported versions and benefiting from the latest features and improvements. |
_________________
Canned Water - the new California approved parts cleaner (except in a drought in which case rub it with sand).
George Carlin:
"Most people don't know what they're doing, and a lot of them are really good at it."
Skills@EuroCarsPlus:
"never time to do it right but always time to do it twice" |
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Westy77
Samba Member
Joined: September 20, 2024
Posts: 5
Location: Guelph
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| Posted: Sat May 17, 2025 6:35 pm Post subject: Re: Help with CB Performance EFI |
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Thanks SGKent and MRoss. I'll look into running a virtual machine.
I think the filter is okay but I'll check it out tomorrow.
I appreciate your help! |
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richparker
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Joined: November 24, 2011
Posts: 7779
Location: Durango, CO
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BDorsey
Samba Member
Joined: April 29, 2015
Posts: 137
Location: SoCal
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| Posted: Sun May 18, 2025 7:59 am Post subject: Re: Help with CB Performance EFI |
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Are those carburetors in your picture? Is that an older pic before the efi?
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1982 2.0L Aircooled Country Homes Camper |
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panel
Samba Member
Joined: December 02, 2001
Posts: 1228
Location: Victoria B.C. Canada
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| Posted: Sun May 18, 2025 10:28 am Post subject: Re: Help with CB Performance EFI |
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| BDorsey wrote: |
| Are those carburetors in your picture? Is that an older pic before the efi? |
They look like ITB's or throttle bodies. You can see the injectors a bit , into the manifolds.
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My '65 Bus~Subaru EJ20 Megasquirted Turbo conversion |
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panel
Samba Member
Joined: December 02, 2001
Posts: 1228
Location: Victoria B.C. Canada
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BDorsey
Samba Member
Joined: April 29, 2015
Posts: 137
Location: SoCal
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| Posted: Sun May 18, 2025 11:25 am Post subject: Re: Help with CB Performance EFI |
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| panel wrote: |
| BDorsey wrote: |
| Are those carburetors in your picture? Is that an older pic before the efi? |
They look like ITB's or throttle bodies. You can see the injectors a bit , into the manifolds. |
Thanks.
_________________
1982 2.0L Aircooled Country Homes Camper |
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Westy77
Samba Member
Joined: September 20, 2024
Posts: 5
Location: Guelph
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| Posted: Sun May 18, 2025 2:47 pm Post subject: Re: Help with CB Performance EFI |
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Please see my note about not knowing anything about cars.
I meant "fuel pump", not injector.
Yes, those are carburetors, I believe. But again, I don't know. |
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Westy77
Samba Member
Joined: September 20, 2024
Posts: 5
Location: Guelph
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| Posted: Sun May 18, 2025 2:52 pm Post subject: Re: Help with CB Performance EFI |
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richparker wrote:
There’s a lot to unpack here as it goes back to 2014. Don’t know what Gen you have, but I would read it all.
https://www.thesamba.com/vw/forum/viewtopic.php?t=...mp;start=0
Is the CB Black box the ECU for fuel or just ignition or both ?
I'm not sure. I believe my CB computer is earlier than the black box and I'm not sure if it's running just the fuel or ignition. |
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