Fuel control

Reply Subscribe

Thread Tools

Search this Thread

Nov 24, 2002 | 06:05 AM

johnAWD

Thread Starter

New Member

Joined: Aug 2002

Posts: 390

Likes: 0

Fuel control

Has anyone installed an Apex-i S-AFC into and A4? If so, I'd like to discuss it with you.

Thanks.

Nov 24, 2002 | 09:04 AM

Audi2ptzero

Elder Member

Joined: Sep 2002

Posts: 14,366

Likes: 1

Search for Stephen(R4R) he has had one on both of his A4's.

Nov 24, 2002 | 10:49 AM

Lambo-Bully

AudiWorld Senior Member

Joined: Jul 2001

Posts: 1,078

Likes: 0

Yes, it can be done. I'll be doing mine with the new engine.

You'll need the rpm, throttle, Maf, power & ground signals right. Apexi super afc won't work on a dbw, since it can only manipulate one signal(MAF or MAP) by what I know. I'll post a thread when I do mine if you can wait until January

Nov 24, 2002 | 02:38 PM

johnAWD

Thread Starter

New Member

Joined: Aug 2002

Posts: 390

Likes: 0

Re: Fuel control

Cool - I figured as much. Is there a pinout of the ECU/ECU harness online somewhere?

Thanks.

Nov 24, 2002 | 02:46 PM

cuatrokoop

AudiWorld Super User

Joined: Nov 2001

Posts: 18,499

Likes: 87

Re: Yes, it can be done. I'll be doing mine with the new engine.

Yeah, that pretty much sums it up. One of my roommates put an S-AFC in his 90q12v (he hasn't had time to tune it).

Gotta spend time with the Bentley wiring diagrams, and a DMM, to find the proper connections.

Nov 24, 2002 | 05:06 PM

Lambo-Bully

AudiWorld Senior Member

Joined: Jul 2001

Posts: 1,078

Likes: 0

Re: Yes, it can be done. I'll be doing mine with the new engine.

I've already done my homework, as far as the wiring diagrams go. I'll just need to do the probing to check the signals prior to hook-up, and see which throttle signal I'll need to use. Audi's use two signals from the throttle, and they criss-cross so to say....I'm guessing I'll need the one that goes low to high?

Nov 24, 2002 | 06:10 PM

cuatrokoop

AudiWorld Super User

Joined: Nov 2001

Posts: 18,499

Likes: 87

Re: Yes, it can be done. I'll be doing mine with the new engine.

I can't remember which signal we found worked best for the throttle position, but I do know that we used the cam position sensor for the RPM.

It took several hours of me trying to get at plugs under the hood with probes connected to the SAFC, and someone else working the "go" pedal and watching the SAFC display, before finding proper signals. Hopefully, it will be worth it when the engine is finished being built...