1999 Miata / new DIYPNP - won't crank
02-25-2014, 08:23 AM
#1
!!!! I NEED TO POST !!!!
Thread Starter
Join Date: Jul 2011
Location: Duluth, GA
Posts: 1
1999 Miata / new DIYPNP - won't crank
Hi - I am new to the MS2/Extra world.
I have a 1999 Miata with MAF delete / GM IAT - just built a DIYPNP.
I carefully followed the instructions...I think that I have all of the connections where they go, but I do not know how to prove it...
I just took the car out in stock format to get a 12-month leading emissions test, so it had run the same day before the computer transplant.
I loaded the 3.3.0 firmware, with the starter msq tune for the 99-00 miata.
I calibrated TPS, CLT, IAT, and AFR linear equation.
MAP shows something like the correct pressure.
CLT, IAT seem to read correctly sitting cold.
I can get some very occasional popping after a lot of cranking.
Per the MS2 / Extra tuning page, I started messing with the cranking pulse width and the afterstart ratios.
Never have gotten a really convincing set of firing, though.
I read some posts here with some interesting finds - could I have a bad connection [crank sensor? cam sensor?]
I noticed that the starter tune did not have an accurate fuel demand and did not have the engine size correct. There were also no values for injector size, so I fixed that. I will eventually drop in my larger injectors, AFTER I get the motor to run.
I tried to attaching three cranking logs and my latest modified starter tune [can it be called a tune if it does not run?]. This site would not take the data logs - it called them invalid. I will try to post them to a sharing site.
I would GREATLY appreciate some assistance in getting through the frustration of trying to get the car to run.
Is there someone's NB msq that I can load [setup for stock condition] to rule out that it is a software issue?
Some questions since I am a newb here -
Why is the CLT temp spiking?
Am I somehow trying to start on the prime pulse?
How can I prove that I have power supplied during cranking? I think that the popping proves that I have fuel..
Big thanks in advance...your help is really appreciated!
I have a 1999 Miata with MAF delete / GM IAT - just built a DIYPNP.
I carefully followed the instructions...I think that I have all of the connections where they go, but I do not know how to prove it...
I just took the car out in stock format to get a 12-month leading emissions test, so it had run the same day before the computer transplant.
I loaded the 3.3.0 firmware, with the starter msq tune for the 99-00 miata.
I calibrated TPS, CLT, IAT, and AFR linear equation.
MAP shows something like the correct pressure.
CLT, IAT seem to read correctly sitting cold.
I can get some very occasional popping after a lot of cranking.
Per the MS2 / Extra tuning page, I started messing with the cranking pulse width and the afterstart ratios.
Never have gotten a really convincing set of firing, though.
I read some posts here with some interesting finds - could I have a bad connection [crank sensor? cam sensor?]
I noticed that the starter tune did not have an accurate fuel demand and did not have the engine size correct. There were also no values for injector size, so I fixed that. I will eventually drop in my larger injectors, AFTER I get the motor to run.
I tried to attaching three cranking logs and my latest modified starter tune [can it be called a tune if it does not run?]. This site would not take the data logs - it called them invalid. I will try to post them to a sharing site.
I would GREATLY appreciate some assistance in getting through the frustration of trying to get the car to run.
Is there someone's NB msq that I can load [setup for stock condition] to rule out that it is a software issue?
Some questions since I am a newb here -
Why is the CLT temp spiking?
Am I somehow trying to start on the prime pulse?
How can I prove that I have power supplied during cranking? I think that the popping proves that I have fuel..
Big thanks in advance...your help is really appreciated!
Last edited by sixshooter; 02-26-2014 at 08:39 AM.
02-26-2014, 08:48 AM
#2
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Join Date: Jul 2011
Location: Tampa, FL; Lake Jackson (Atlanta), GA
Posts: 1,902
I'm going to suggest the best help for this issue will be in the MegaSquirt section of Miataturbo.net. That's where the MS gurus hang out. Search the threads to see if someone else has experienced the same issue.
If you decide after searching that your problem is one that has not been discussed previously, be prepared that they like to see you post a nice introduction of yourself in the "Meet and Greet" section prior to starting a new thread. They are funny about that.
I'll look at your MSQ in the meantime and see what I can find.
Good luck.
If you decide after searching that your problem is one that has not been discussed previously, be prepared that they like to see you post a nice introduction of yourself in the "Meet and Greet" section prior to starting a new thread. They are funny about that.
I'll look at your MSQ in the meantime and see what I can find.
Good luck.
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