Shawn,

Thanks for the advice! I have a message into DIYAUTOTUNE support to ask the question of whether the tri-tach solution is viable. The manual says it is experimental. Given that this is my first EFI conversion, your advice is solid. I can always try fuel/ignition someday in the future.

Pretty much every possible advantage. Finer tuning being the major one. I ran batch for a while on mine, and could never get it quite right. Now that I'm running fully sequential, it's spot on.

Any advice you can share on how you wired it up? I'm having a tough time translating between the Audi ...

Reading through the MS3PRO EVO manual, I see that it now handles 135 teeth/rpm directly and that if I connect CKP to the sensor that counts the flywheel and the CMP wire to the one tooth trigger on the flywheel, I can get sequential fuel rather than batch fuel. Is there any advantage to sequential ...

Thanks!

I used a temp sensor from an NG to feed the MS. Works really well, and fit the factory 10mm thread.

I guess the question is whether I can use the sensor by the yellow arrow or instal a sensor at that spot. If I recall, the sensor by the red arrow is an oil pressure sensor. I think the sensor by ...

Do you use an existing Coolant Temperature Sensor or install a separate one for the MS ECU? I have two unused sensors that could work or serve as the location for a new sensor.

Temp Sensors by TrailAgent, on Flickr

Just so I make sure I understand, I would wire the MS3 CKP+ wire to the screw terminal on the coil where the blue/gray wire is connected from the ignition control module (terminal on the right in the image below).

"You're basically picking up output of the ECU telling the coil to fire which is a nice, clean, strong 12v square wave."

Got it! Thanks for the clear explanation.

To clarify, could I splice the MS3Pro CKP+ Wire (which is the wire the MS3 instructions say to use for a hall sensor - see below) with either the Mac-14 ECU Hall Sensor Timing Signal (Pin #27) or RPM Sensor Signal (Pin #11)? If so, which one #27 or #11? There is also a Tachometer wire (#7) from the ...

The MS3Pro EVO manual says “For fuel only installations, you will want to use a 12 volt square wave tach signal, like the one provided by most aftermarket ignition modules.”

This is where I need the most help. How does one tap into the 12v square wave tach signal? Is it simply a matter of ...

Pulled the trigger on a MS3Pro Evo. I'll start with fuel only for now, but be able to easily add boost control and ignition down the road.

Are you using MS3X for both fuel and ignition? My woes appear to be mostly related to fuel delivery. Do you recommend using MS3X for both fuel and ignition right away? If possible, I would like to tackle fuel now and consider ignition another day.

Thanks for responding. I definitely could use some assistance. I’ll take a look again at MS3X and let you know what questions I have.

Well, apparently, it has been a few years since I have posted on this Forum. The Audi 4000 20vt has been running pretty well. I've made a few upgrades, such as larger intercooler placed in front of the radiator which allowed me to go back to a stock grill and quite a bit of maintenance. My biggest ...

Looking for a Audi 5000 100 or 200 injector cooling fan and any hoses, clamps and parts that go with it.

My seal is old and may be on its final days. I am looking for a replacement that I will likely need if and when I get the car resprayed. Please let me know if you have one in good (soft) condition.

Nearly finished fitting the replica grill I ordered from Latvia (cool-wheels.com). Originally, it was too tall because of the stainless metal trim on the bumper. But, with some trimming and cutting, it should mount nicely and hide the intercooler.

https://farm8.staticflickr.com/7658 ...

Wow, what a difference new suspension and tires make. Finished installing H&R sport springs, Bilstein B8 springs and new bushings, bolts, etc. all around. After the alignment, the car feels amazing. I also sorted out the exhaust drone. Turns out that the exhaust tips needed to be extended a bit and ...

Traced the cord-start problems to the Warm-up Regulator. I think I found the last NOS part in existence in the U.S. at RockAuto.

Got started on new suspension and brakes this weekend. I will be replacing every bushing and bolt. The struts and springs will be replaced with Bilstein Struts and H&R ...

Looking for a UR Quattro compatible Control Pressure Regulator (sometimes referred to as a Warm-up Regulator)

Thanks, I no longer need the intake manifold or the oil pump. I was able to fix the oil pump.

I need some advice on the exhaust system.

For the swap we temporarily mated the 2.5" down pipe to the stock 4000 2.25" system. It was quieter than a minivan both outside and inside. The stock system had two mufflers.

Today, we replaced the 2.25" pipe with 2.5" and a Vibrant Ultra Quiet Resonator ...

I recall alot of people warning about using those with 115 psi of fuel (or whatever max you run). We all secretly wanted it to work for you tho

It must be working for me! Cold start is difficult, but once it's started it drives like a rocket! My mechanic is German and used to work for Audi in the ...

Could there also be a blockage somewhere in the breather hose system that the cone filter is relieving?

Well, that didn't work. I connected a hose from the intake to the valve cover and got a rough start, rough idle and engine sputtering. When I pressed the throttle I got smoke out of the exhaust and the car nearly stalled. When I put the cone filter back on the PVC valve port and capped the intake ...