Audi RS2

[GintsK]

Cause is 7A flywheel. You need Hall inverter.

Gints

[AVP]

the ecu is suplied with the hall inverter

[AVP]

anything else i can do? if the hall inverter is in the ecu and should work is it possible that the problem lies with the vems software needing a reset or something?

[GintsK]

Interesting..
Before reflashing I would check all three reference sensors with scope.

What is high output ign coils?

[AVP]

problem solved with the help of marc swanson. the 7a flywheel has a very thin pin for thw sensor to pick up,so we had to weld a metallic pon large and yrim ot to spec in order to pick up the signal.

high output coils are the LS2 ignition coils i installed which allow more dwell to be ised to avoid the misfires.

[th.b.w.]

Hy Vasilis,

i run the LS2 Truckcoils and Siemens Deka 630ccm injectors too.

Idle is very smooth, pulswith is about 1,6 - 1,7ms.
Ign. dwell is set to 3,59 idle < 5,10 ms at WOT

Works fine with 1.1.64, but i need a good timing map for high boost 1,6 - 2.0 bar....
i don't know what the limit is , i heard about 20° at 7000/1,6bar and 18°at 7000/2.0bar...???


Thomas

[AVP]

Hi,

i replaced the 440 injectors to 630(siemens)
Along with that, i changed the rampup stage from 192 to 280.
now the problem i get after setting up the map is the fact that when the car runs at its warm temp of over 70C, the idle VE bins are ideal and ego correction is not doing anything really. BUT, when the engine gets hotter, to 84C where the fan starts to work, then the VE bins are lean, with the ego correction adding as much as 5-6 levels (from 91 i have to take it to 97 to get 0 ego correction).

That happens in traffic or when the car is on a hot day generally. All the rest of the bins are always correct and ego does not seem to be doing much, the problem seems to be more apparent on idle.

I use the IAC but even when it is turned off, nothing really changes the fact that the engine is leaner.
With Marc's directions i increased the batt calc from 544 to 608 with a small improvement, but it still lean.
can someone tell me what is best to do?
should i use the warm up enrichment scale to increase the fuel?
Should i try and map the car with the rampup of 192 instead of 280?

[mattias]

AVP: Closely monitor your MAT/IAT and see if it heat soaks. If true,  you can solve it with MAT/TPS enrichment table by adding a few % at low TPS/high MAT situations.

[AVP]

how would i know if it is heatsoaking? its in the same position that it was on the original manifold, and it seems to be responding as it did before(old injectors)

Also i still use 1.1.27, so i dont have that table to use for now.

i would probably need to upgrade to work it out that way.

is there an easy solution for the older firmwares?

[mattias]

You'll see if it's heat soaking at idle/low speed if it's displaying higher temperatures than while cruising and driving around normally at higher speeds.

The sensor basically shows the temperature of the metal where it's mounted, and not the intake air, which gives a false reading since the air is actually cooler = running lean.

[AVP]

aaa i see
is it possible to fit a gasket then around that area to correct that as well?

[th.b.w.]

Hy,
is it important to set an other rampup for the Siemens Dekas ?

I run with the Bosch setup.... :-\


I have an other problem:

in the Range of 6100 the RPM turns from 5900 to 6300 an do some misfire .
In the Logfile it shows like a wave in this RPM range, but i don't know why.....

Only in the range of 6100.....


Thanks Thomas

[AVP]

hi thomas,
please since this is a different problem than what im experiencing, is it possible to write it in a different thread?

thanks

avp

[th.b.w.]

Hy, sorry

yes of course...... ;)

Thomas

[AVP]

noticed that my temp sensor, has a thin gasket fitted so that would make some compromise for heat soak. Original audi has nothing by the way.

so i doubt if this is heat soak.

when driving along a highway, obviously temps fall, so i have something like 73-76C CLT. BUT the normal engine temp is 80-84C. Should i make the VE according to the temps of 80-84? or should i just leave it as it is?