MS3 pre-1.4 beta 13 released

[jsmcortina]

did some testing with vvt3 back on the opto.

Does VVT3 still misbehave in the same way if the control solenoid is unplugged?

James

[ashford]

will give a try tonight, ordered a new sensor as well(just in case) apparently these never go out as the dealer said they have never sold one before, should get it later this week

[ashford]

here is a log of the drive home with the actuators unplugged

[aidandj]

I'm going to load this up on my car today. Got a question though..... Will there ever be a 4G63 decoder with sequential phasing for 1.6L Miata engines? I have a customer who wants to switch to COP and sequential fueling, but not until there is a decoder option for it so we can avoid rewiring the injectors

I and quite a few others are running sequential fuel and spark on 1.6 miatas. What is the issue that is stopping you from doing it?

Are you doing it with the stock 4G63 decoder and an unmodified CAS? The phasing is set up for a 1.8L which has the CAS driven by the exhaust cam it's 360deg off when used on a 1.6 (CAS driven by the intake cam)

In general sequential fuel and spark works with an unmodified CAS on the 1.6. When you get a 1.8L engine you also need the crank sensor.

Miataturbo.net has a bunch of good info. But do your searching before you just go ask questions.

[prof315]

I and quite a few others are running sequential fuel and spark on 1.6 miatas. What is the issue that is stopping you from doing it?

Are you doing it with the stock 4G63 decoder and an unmodified CAS? The phasing is set up for a 1.8L which has the CAS driven by the exhaust cam it's 360deg off when used on a 1.6 (CAS driven by the intake cam)

In general sequential fuel and spark works with an unmodified CAS on the 1.6. When you get a 1.8L engine you also need the crank sensor.

Miataturbo.net has a bunch of good info. But do your searching before you just go ask questions.

I'm going to have to disagree with you on this. I have done a TON of Miata's on MS using the 4G63 decoder, both 1.8L and 1.6L and only the 1.8L phases correctly for sequential and a 94-95 1.8L has no CKP. Now I'm fairly sure you could flip the drive key on the CAS 180 deg and phase correctly for sequential on a 1.6L, but it's easier to do it with software and the test code James sent me works. Please note I am not talking PnPs here, these are all standard MS2 and MS3 V3.0 units set up for at least sequential ignition.

[aidandj]

I am currently running a 1.6 with a stock CAS and sequential ignition and injection. MS3 mainboard+MS3x expansion card. I don't know what else to tell you.

[prof315]

I am currently running a 1.6 with a stock CAS and sequential ignition and injection. MS3 mainboard+MS3x expansion card. I don't know what else to tell you.

And I've got 3 1.6L customers running MS3/3X with the stock CAS where the phasing is 360deg off so I am not sure what to say either. But I do know this.... at least one of the cars has the old school CAS with actual hall effect sensors and teeth not the second gen CAS with the optical triggers.

Regardless, James' test code which allows adding 360 to the trigger angle to correct phasing works and it's not mandatory that you add it.

@James. If your fix actually goes into release code ( and I think it should ), something like "1.6L Miatas MAY need the phasing corrected for sequential operation, if so add 360 to your trigger angle" would be appropriate in the manuals.

[aidandj]

http://www.miataturbo.net/megasquirt-18 ... ion-76082/

Explains all.

[jsmcortina]

http://www.miataturbo.net/megasquirt-18 ... ion-76082/

Explains all.

I read four pages of guff and didn't find anything that explained it. Was that the correct link?

James

[jsmcortina]

@James. If your fix actually goes into release code ( and I think it should ), something like "1.6L Miatas MAY need the phasing corrected for sequential operation, if so add 360 to your trigger angle" would be appropriate in the manuals.

It will and thanks.

James

[aidandj]

Mostly this:

http://www.miataturbo.net/megasquirt-18 ... ost1074268

this:

http://www.miataturbo.net/megasquirt-18 ... ost1074293

[AbatelliCristian]

On 1.4 firmware I see problem with generic sensor.
When RPM > 0 generic sensor is intermittent

I attach log and msq

You can see, when rpm >0, MAP2 BackPressur, Air Cond are intermittent

[jsmcortina]

Sounds like I left some debug code in place before putting the build together. I'll check and put out another if that's the case.

James

[jsmcortina]

here is a log of the drive home with the actuators unplugged

OK, so clearly random misdetection which is unrelated to outputs.

I have an idea to try.

James

[ashford]

tried it on a new sensor before trying beta14. angles were offset about 4 degrees and there is an improvement.
one log actuators unplugged and plugged in.

will try out beta 14 after i get some work done at the shop