S4wiki:Community Portal: Difference between revisions
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* What voltage indicates negative flow? Does the ECU use it? |
* What voltage indicates negative flow? Does the ECU use it? |
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* Is MAP used in [[characteristic curve]] when ECU detects broken/unplugged MAF? |
* Is MAP used in [[characteristic curve]] when ECU detects broken/unplugged MAF? |
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* Near the top of the MAF range, it seems to have a smaller and smaller effect on fueling. Does this mean that maxing the MAF isn't as bad as many believe? |
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===[[Lemmiwinks]]=== |
===[[Lemmiwinks]]=== |
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* The [[load]] discussion in the [[lemmiwinks]] article is a now bit better, but still missing where the open/closed loop decision is made. |
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* High [[EGT]] (>980°C) and [[IAT]] (>120°F) corrections.. |
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*# is there a flag for each, or is the correction progressive? |
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*# does it affect both fueling and timing? |
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*# does it affect req boost? |
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*# does it affect load calculations? |
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===[[Generations]]=== |
===[[Generations]]=== |
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*# Some are 2001, some are 2001.5 (no verification of this rumor) |
*# Some are 2001, some are 2001.5 (no verification of this rumor) |
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*# Some 2001.5 came with h-boxes and do not appear to have F-hoses (doubtful, probably incorrect report) |
*# Some 2001.5 came with h-boxes and do not appear to have F-hoses (doubtful, probably incorrect report) |
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*# Still trying to figure out what the AGB engine code is |
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* 05/01 and 06/01 cut-off date for 2001.5 and 2002 MY may not be 100% accurate |
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*# The 2001.5 Tiptronic is listed with build date of 05/01 with L or M box ECU. |
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*# The 2002 Tiptronic is listed as build date 06/01 with AA box ECU. |
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*# However, my 2002 Tiptronic has a build date of 05/01 and came with an AA box ECU. |
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==Articles that need work== |
==Articles that need work== |
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* is there tip/6sp variation? |
* is there tip/6sp variation? |
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===[[ |
===[[Engine recode]]=== |
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* different between ESP/non-ESP, but how does it interact with ABS and EDL? |
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* sigh. stub for now. |
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==Articles that need content== |
==Articles that need content== |
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===[[ECU Explorer]]=== |
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* USB driver howto |
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* registration key guide |
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===[[Load]] (aka [[Charge]]?) vs [[Torque]]=== |
===[[Load]] (aka [[Charge]]?) vs [[Torque]]=== |
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===[[Open loop]]/[[closed loop]]=== |
===[[Open loop]]/[[closed loop]]=== |
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* What determines which is used when? |
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* What inputs are used in each to determine fueling |
* What inputs are used in each to determine fueling |
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** closed loop: req load-> base maps + adapt channels + ltfts (derived from stfts) + stfts? |
** closed loop: req load-> base maps + adapt channels + ltfts (derived from stfts) + stfts? |
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** req load (based on throttle position during partial throttle or target idle torque if throttle postion is zero) vs calculated load (based on MAF) |
** req load (based on throttle position during partial throttle or target idle torque if throttle postion is zero) vs calculated load (based on MAF) |
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** add in cruise control, traction control, engine protection (e.g. [[throttle cut]]) |
** add in cruise control, traction control, engine protection (e.g. [[throttle cut]]) |
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===[[EGT enrich]]=== |
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* two thresholds |
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*# 980C, direct from EGT sensor, which does not read below 945C (1733F) |
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*# 500C, from calculated EGT, which is derived from load/RPM |
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===[[O2 sensor]]=== |
===[[O2 sensor]]=== |
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* Wideband sensor - accurate everywhere! Great for tuning open loop. |
* Wideband sensor - accurate everywhere! Great for tuning open loop. |
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===[[Knock control]]=== |
===[[Timing]] and [[Knock control]]=== |
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* Relationship between KVs and timing correction factor |
* Relationship between KVs and timing correction factor |
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** Direct? |
** Direct? |
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** Filtered/corrected somehow? |
** Filtered/corrected somehow? |
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** Are logged KV's corrected? |
** Are logged KV's corrected? |
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* Relationship between IATs and timing maps |
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===[[Characteristic curve]]=== |
===[[Characteristic curve]]=== |
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* When is it consulted? |
* When is it consulted? |
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* Is [[MAP]] used? |
* Is [[MAP]] used? |
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* What if ECU detects broken/unplugged MAP? |
* What if ECU detects broken/unplugged MAP? |
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===[[Manifold air pressure]]=== |
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===[[Synchronous path]]/[[Asynchronous path]]=== |
===[[Synchronous path]]/[[Asynchronous path]]=== |
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* Synchronous path outputs: [[VVT]], ignition timing, injector pulse width |
* Synchronous path outputs: [[VVT]], ignition timing, injector pulse width |
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* Delete howto |
* Delete howto |
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===[[ |
===[[Manual boost controller]]=== |
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* Parallel vs series vs alone |
* Parallel vs series vs alone |
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* Tuning |
* Tuning |
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* aka [[MAP]] clamp |
* aka [[MAP]] clamp |
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===[[N75]],[[N249]],[[Wastegate]]=== |
===[[N75]], [[N249]], [[Wastegate]]=== |
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* N75 controls wastegate |
* N75 controls wastegate |
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** how is req. boost related to waste gate duty? |
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** why delete? (to use MBC, AVCR etc) |
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* N249 controls [[BPV]] |
* N249 controls [[BPV]] |
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** why delete? (no conclusive proof of any advantages) |
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===[[RNS-E]] Nav information=== |
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Latest revision as of 19:49, 28 July 2011
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.
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, check out the external links page!
To do lists |
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Questions that need answeringMAF
Lemmiwinks
Generations
Articles that need workLong term fuel trim/Short term fuel trim
Glossary
Bypass valve
Cluster recode
Engine recode
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Articles that need contentECU Explorer
Load (aka Charge?) vs Torque
Open loop/closed loop
EGT enrich
O2 sensor
Timing and Knock control
Characteristic curve
Synchronous path/Asynchronous path
Variable valve timingF-hose
Manual boost controller
Throttle cut defender
N75, N249, Wastegate
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