my megasquirt troubles with starting, this time with video v.at this point I'm lost - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 01-24-2008, 01:44 PM   #21
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i had trouble with the usb adapter that DIY sells...it's too short.


otherwise my radioshack expensive *** thing has been flawless. and at 6' reach is great.
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Old 01-24-2008, 02:44 PM   #22
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I used a cheap one from newegg for 9 bucks and it was flawless and now im using a Belkin converter which according to my friend has a opto voltage isolator or some other non sense and it works flawlessly too.

Personally my recommendation to people with firmware and megatune problems is to run memtest on their computers and check for bad ram. Since all of these programs store **** temporarily in ram before writing and are memory heavy constantly reading and writing if you got errors it will be corrupting your ****.
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Old 01-24-2008, 04:50 PM   #23
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Originally Posted by Arkmage View Post
I highly recommend the onboard USB logic converter from DIY. When I bought my new notebook the usb converter wasn't working for ****. It would lose comms every few seconds. I installed their onboard adapter and everything is groovy again.

The reason I mention this is that a lot of your problems could be a result of bad flashes and/or lost packets during MSQ burn. If you have communication problems it's hard to to be sure that all the info got into the unit.
I'm going to try the DIY signal settings tonight. If its still screwed up, I'll order the item you speak of.
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Old 01-24-2008, 04:52 PM   #24
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Originally Posted by Braineack View Post
you still need to tune your cranking PWs lower.

you may want to try fixed then decay.

does it do this only when plugged into the cable? can you recreate this just playing with files offline?
It does it all the time when cold starting regardless of whether is on the pc or the ecm...which tells me its I have too little PW.
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Old 01-24-2008, 05:35 PM   #25
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I'm going to try the DIY signal settings tonight. If its still screwed up, I'll order the item you speak of.
The DLP-TXRX while you could probably make it work with the MSPNP, is going to be much harder to work with on that board with the SMT soldering... if you're up for ti great, but I'd hate to see you order something you can't use.

The USB-2920 should work great, I've used it on a ton of different laptops with good results. That doesn't mean there aren't troublesome ones out there, but it's a good adapter from what I can find. As for it being too short... it comes with an 30" extension in the package, with that attached to an MSPNP tunecable I've never come up short.

The lastest drivers can be downloaded from our main software page at https://www.diyautotune.com/softwarelinks.htm
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Old 01-24-2008, 10:12 PM   #26
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so I finally got the car started at work today, and on the same map I drive to work on, the car is idle-oscillating from 1500-3500rpm, and wouldn't start on the same map which it started from this morning. This morning it idled fine at 14.7-15.1AFR at idle. Hopefully its something like the IAC because i think the tune is pretty solid. I also assume the USB controller is fucked up because now I get communication between the computer and the ECM, but it won't burn any changes.

So much for putting the 1.9l motor in next weekend. I may **** with it tomorrow, but I have to pack for vacation. Thanks for the help anyway guys.


Matt, thanks for the support on this deal. I'm going to jack with it on my time, so don't sweat the issues I've had. I'll do everything I can to work it out on my own, and I'm going use a friend's computer (who's about to buy a 1.8 pnp from you) and see if I can get it to work. I know we'll get it worked out eventually. If I have to stick the forged motor in here and drive it to GA on the factory computer with the wastegate open to figure this out, I will.

I must throw down the TOD at "Miatas at Hallett" this year.
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Old 01-24-2008, 10:51 PM   #27
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unplug your idle valve and find out. it'll act like no change at all if you unplug it, then you can suspect it being bad.
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Old 02-05-2008, 03:01 PM   #28
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my **** works again after cleaning out the iac. My ASE values are super high...but I guess the AFR's don't really lie.
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