1987-1993 BMW E30 M20/M30/S38 MSPNP Gen2 ECU

This ECU is for the later 55 pin wiring harness; the stock wiring harness in 1986 would have used a 35 pin connector that does not physically fit. I have seen older M30 motors swapped to the later 55 pin wiring harness and crank trigger; the MSPNP could be used in that case.

The MSPNP does not have an upgrade path - it trades flexibility for being pre configured for its application, and the processor is not removable. We have considered an MS3Pro based option for these cars and may offer one in the future if there's enough demand.

Yes, this could run a turbo engine no problem. I would recommend adding the following.

• GM type IAT sensor, for bypassing the air flow meter.
• Wideband O2 sensor and controller
• Boost control solenoid

The DIYPNP is temporarily unavailable until we can resolve the problem with the connector shortage. The DIYPNP connectors are not the exact same version as used in the BMW ECUs, but are a slightly narrower variant to fit in the DIYPNP case. If you wish to purchase one without the connector anyway, please contact us directly.

Using this ECU on the M106 will require swapping to the later M30B35 wiring harness and crank trigger. It will not plug into an M106 wiring harness; the connectors are different.

The MSPNP Gen 2 has its own documentation:

MSPNP Gen 2 V1.3 manual

It uses a MicroSquirt Module at its core, with the other boards being unique to the MSPNP Gen 2 and not related to the V3.0 or V3.57.

The easiest way without special cables is to use alligator clips - the 55 pin connector has pretty wide pin spacing, so it's not too hard to get test leads on it. Use pin 19 for ground and pin 37 for the 12 volt power supply.

Yes. You'd also need the later engine's crank trigger as well.

We sell a separate kit with an IAT sensor, mounting bung, and pins that can be stabbed into the air flow meter connector to wire it up. See the MSPNP2-B8793 installation directions for how to install this kit.

Yes, you just need the IGN-6, the IGN-6's connector, a QuadSpark, and suitable spark plug wires. It runs off the factory crank trigger; no extra sensors are required.

We have several full time tech support people who support this ECU by email and over the phone.

They ship with 3.3.1 as this is the firmware the tune was developed on. You can upgrade to later firmware if you wish.

There is a 4 bar MAP sensor inside the MSPNP. You just need to run a vacuum hose from the port on the MSPNP to the intake manifold.

Model specific installation directions are here. Internet connectivity is not required, but you may need to use a USB thumb drive if we need to share files over email for support reasons.

The default tune is set to ignore the factory throttle position switch. Adding an E36 TPS is not required, but it does give additional options for tuning boost control and acceleration enrichment.

Let's start with an alternate communications test. To do this check, you'll need the program portcheck.exe. If you don't have a copy, download it here:

http://www.diyautotune.com/downloads/tuning_software/portCheck.zip

Power up the Megasquirt and connect it to your PC. You do not need to open the case and should not put the boot jumper in place for this test. Close TunerStudio if it's running, and run the portcheck.exe program. When this program starts, it will scan the available COM ports.

If the port it's scanning is not connected to a working Megasquirt, or it's on the wrong speed, it'll say "No connection made." If it's on the right port and right speed, it will give you the version of the Megasquirt firmware that's on the Megasquirt.

If you get a port where it replies with "S" or something else that doesn't look like a firmware version, this port is probably a mouse port or other port that echoes back everything that's typed. You can usually ignore these unless you're doing certain specific tests.

Please email us a screen shot of the results you get, and I'll go over where to go from there. We'll get this figured out. Worst case, the ECU is covered by a one year warranty if you need any repairs.

As long as you're using a harness with a 55 pin ECU connector, this will be able to run the engine, no wiring changes needed. You will need to adjust the tune to what this engine needs.

Some E30s had ECU controlled tachs and some early ones did not. The default tune is set up for those without an ECU controlled tach and you can turn the tach output on in software if needed.

If you run into this issue, go to Basic Setup -> Tacho Output Pin, and make sure the tach output is enabled and the output pin set to Tachout.

We typically use 93 octane for tuning unless we specifically wanted to tune the engine on something else (the 4.8 LS base map was tuned on 87 octane, but that's the only one I am aware of where we used a different fuel). The car was an Improved Touring build with minor bolt ons, so the base tune should be considered an approximate starting point rather than a final map to run.

Yes, the MSPNP and its DIYPNP solder it yourself counterpart are still both in production.

The instant fuel mileage gauge is one of the few things we were not able to keep working.

On the MSPNP, the MS2's two spare analog inputs are being used for knock input and barometric correction. It is possible to repurpose them for other sensors, but difficult. If you need a lot of I/O, an MS3 may be a better option, although this is not plug and play.

Yes, the MSPNP can do closed loop fueling based on O2 sensor feedback - either narrow band or wide band. On a turbo car, you'll want a wideband with an external control unit, like an Innovate LC2.

A/C input input is standard.

The MSPNP is shipped configured for the stock single coil. Running it in wasted spark just requires adding an external ignition module and coil pack, like our QuadSpark and IGN-6.

We currently do not sell a TPS - a lot of E30 owners have adapted one for an E36. It supports most broadband Bosch knock sensors, although we currently do not stock these either.

EFI Analytics sells a Bluetooth dongle that plugs into the MSPNP's communications port.

We have some of the stock BMW connectors in our wiring components catalog, but not all of them. Check our catalog to see if we have what you need.

Yes, the site accepts PayPal.

Yes, it works with an M30B35 for the years listed - we include an approximate startup map for this motor on the USB thumb drive.