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Old 05-30-2016, 07:16 PM   #1
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Default DIYPNP 00 Miata No Start

I have been trying to get my diypnp to start my 00 Miata. Today I got the car to crank and start and then turn off right away. If I give it gas while it is starting it will run for a little and backfired thru the intake. If anyone has any input on what I should try I would be greatly appreciated. I have attached the datalog of when I was starting up and the tune file.

I have
AEM X series wideband
GM IAT sensor
no MAF
stock injectors

Attached Files
File Type: msq stock.msq (112.0 KB, 31 views)
File Type: msl 2016-05-30_17.27.07.msl (341.7 KB, 38 views)
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Old 06-01-2016, 02:19 PM   #2
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If it's backfiring through the intake, check the timing.
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Old 06-01-2016, 03:54 PM   #3
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I do have an adjustable timing wheel that I set back to 10 degrees with the stock computer in before trying to put the mega squirt in. So with the megasquirt and the 99-00 miata base map I can not get the motor running enough to check timing. What should my settings for timing be set to in tuner studio to get it thinking it is normal again.
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Old 06-01-2016, 10:15 PM   #4
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Have you tried running with the MAF before using the IAT? My car ran fine for awhile off of the MAF. Then once I got comfortable with it, changed a few settings, and switched over to the GM IAT. The base map with the PNP worked ok for me but at least the car would run enough to tune...
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Old 06-02-2016, 09:34 AM   #5
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Yes i tried it with and with out the GM IAT sensor I though that may of been the problem that it was not there so I hooked it up with the same out come. Later today I will post pictures of the inside of the mega squirt. So someone that has built one of these before can see if anything looks out of place. Though I have looked thru the instructions a few times. Hope I can get some incite.
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Old 06-02-2016, 11:43 AM   #6
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Any chance you took the timing wheel off since it ran last? I've seen a lot of people put the wheel on backwards and get similar results.
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Old 06-02-2016, 11:59 AM   #7
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Quote:
Originally Posted by pdexta View Post
Any chance you took the timing wheel off since it ran last? I've seen a lot of people put the wheel on backwards and get similar results.
No I never took the timing wheel off after I installed it. And it worked fine with the stock ecu no problem.
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Old 06-02-2016, 02:40 PM   #8
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Disconnect the injectors and check timing while cranking.
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Old 06-02-2016, 02:55 PM   #9
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Quote:
Originally Posted by Matt Cramer View Post
Disconnect the injectors and check timing while cranking.
Alright I will try that tonight. When I do this should I have the diag port jumppered or does it not matter?
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Old 06-02-2016, 03:37 PM   #10
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It doesn't matter. The DIYPNP doesn't use the diagnostic port.
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Old 06-02-2016, 03:57 PM   #11
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It doesn't matter. The DIYPNP doesn't use the diagnostic port.
Ok I will try it and let you guys know what happens. Oh and if I am using a wideband do I need to unplug the factory primary o2 sensor?
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Old 06-03-2016, 01:18 PM   #12
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Depends on how you've got it wired, but there is certainly no reason to leave the factory O2 sensor plugged in.
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