Rexall

From 07/26 - "At a light
Light turns green
I hit the gas pedal and the car goes from its normal tone to a hard rumble.
80% of power is gone.
Can't hear turbo spool.
No warning lights
Problem I had at the end of July

I pull into a gas station and the car keeps doing it. The exhaust sounds like a slow idle v8 and the engine sounds like a muffled tractor motor or something unrefined. Its like there was more space between each piston firing. The whole car was rattling.

I turned the car off and restarted it and let it run and nothing changed for 10 minutes. I decided to drive it back home and after a quick 5 or 10 second stop from traffic I hit the pedal and it was gone."
Well it happened again the next day so I crawled it over to Champagne.
They identified the problem as a FAILing ignition control module. The car sounds better and runs harder than even before the problem surfaced. No hesitation, a clear power increase, and a willingness to get into boost that'd disappeared sometime in the last year or so.

20VT90q

Glad to see its fixed.

Question: Why did you go with the RS2 ECU? How hard is it to swap in? There's a couple wires that need to be swapped right?

UrS4boy

pull injectors while it is missing and then sway the POS connectors (in pairs) to see if the miss moves.<ul><li><a href="https://forums.audiworld.com/s4s6/msgs/115408.phtml">click here for the missing and hesitation diagnostic procedure</a></li></ul>

Rexall

Wasnt my choice. Moody put it in and said he tuned the software himself