S4wiki:Community Portal

=What is the Community Portal?= The Community Portal is the central place to find out what's happening on S4Wiki. Learn what articles need to be written, what questions need to be answered, and what articles still need a lot of work.

There is not much here yet, but if you wish to edit this page, please see Wikipedia's Community Portal for an example of how a wiki community portal should look.

If you are looking for other external Audi S4 related sites, click here!

{| id="Todo" cellspacing="0" cellpadding="0" style="width:100%; border:2px #A3D9BE solid;"  To do lists
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 * colspan="2" style="background:#cef2e0; text-align:center; padding:2px; border-bottom:1px #A3D9BE solid;" |
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=Questions that need answering=

MAF

 * Bosch signal characterization
 * What voltage indicates "zero" flow?
 * What voltage indicates negative flow? Does the ECU use it?
 * Is MAP used in characteristic curve when ECU detects broken/unplugged MAF?

Lemmiwinks

 * High EGT and IAT corrections..
 * is there a flag for each, or is the correction progressive?
 * does it affect both fueling and timing?
 * does it affect req boost?
 * does it affect load calculations?

Generations

 * There is some confusion with cars near the 09/00 build mark
 * Some are 2001, some are 2001.5 (no verification of this rumor)
 * Some 2001.5 came with h-boxes and do not appear to have F-hoses (doubtful, probably incorrect report)

=Articles that need work= ==Long term fuel trim/Short term fuel trim
 * These articles were directly stolen from a BMW OBD-II article. They need to be checked for accuracy wrt. the S4 and ME7.1


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=Articles that need content=

Open loop/closed loop

 * What determines which is used when?

Knock control

 * Relationship between KVs and timing correction factor
 * Direct?
 * Filtered/corrected somehow?
 * Are logged KV's corrected?

Characteristic curve

 * When is it consulted?
 * During both open/closed loop?
 * Is MAP used?
 * What if ECU detects broken/unplugged MAP?

F-hose

 * Why does it exist?
 * Delete howto

Master boost controller

 * Parallel vs series vs alone
 * Tuning
 * Relation to throttle cut and TCD

Throttle cut defender

 * aka MAP clamp


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