MSPNP 90-93 wont start
#1
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hi
installed my MSPNP in my 93LE today.
but it wont start![](https://www.miataturbo.net/images/smilies/mad.gif)
just pops and backfires. sounds like the ignition setting is way off.
runs great with the original ecu.
tryed to manualy sett the ignition with the cas. bottomed it out both ways but its still the same backfiring.
the ignitor gets REALY hot to in just a couple of minutes.
have tryed both the with and wihtout afm software.
same problem.
what to do
installed my MSPNP in my 93LE today.
but it wont start
![](https://www.miataturbo.net/images/smilies/mad.gif)
just pops and backfires. sounds like the ignition setting is way off.
runs great with the original ecu.
tryed to manualy sett the ignition with the cas. bottomed it out both ways but its still the same backfiring.
the ignitor gets REALY hot to in just a couple of minutes.
have tryed both the with and wihtout afm software.
same problem.
what to do
![](https://www.miataturbo.net/images/smilies/confused.gif)
#4
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
ok
the car is in my garage. it about 65 degres fahrenheit.
18 degres celsius. i live in sweden so it takes a lite converting![](https://www.miataturbo.net/images/smilies/smile.gif)
no the car is not stock.
its turbo converted, front mounted ic. no cat.
so far original injectors. thought i would start it with these and the new MS before i swap to my new 440s.
tryed with the no maf first but mounted it back when it not started just to se if that was the problem. but it wasnt.
i swaped back to the original ecu and it started imediatly so i dont think its somthing wrong with the car.
but why does the ignitor get so damn hot so fast
the car is in my garage. it about 65 degres fahrenheit.
18 degres celsius. i live in sweden so it takes a lite converting
![](https://www.miataturbo.net/images/smilies/smile.gif)
no the car is not stock.
its turbo converted, front mounted ic. no cat.
so far original injectors. thought i would start it with these and the new MS before i swap to my new 440s.
tryed with the no maf first but mounted it back when it not started just to se if that was the problem. but it wasnt.
i swaped back to the original ecu and it started imediatly so i dont think its somthing wrong with the car.
but why does the ignitor get so damn hot so fast
![](https://www.miataturbo.net/images/smilies/confused.gif)
#6
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
i have tryed to set the timing meckanikly with the cas. not with a strobe light yet. trying that tomorow.
fiddled a little in megatune with the ignition timing as described in the manual.
whitch parameter should i change if the timing is off when i check with the lamp tomorow?
reloaded it to try with or whitout the afm.
(whit the ignitor contact of)
but why do the ignitor get so hot when im only cranking?
fiddled a little in megatune with the ignition timing as described in the manual.
whitch parameter should i change if the timing is off when i check with the lamp tomorow?
reloaded it to try with or whitout the afm.
(whit the ignitor contact of)
but why do the ignitor get so hot when im only cranking?
#9
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Join Date: Jun 2006
Location: Duluth, GA 30097
Posts: 803
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Check your 'Spark Settings' page, what's the 'Spark Output Inverted' setting set to?
__________________
Jerry a.k.a. 'FoundSoul'
DIYAutoTune.com
'91 Miata BEGi S3 GT2560 w/ MSPNP - 14.1psi - 253whp, 232wtq
'95 Miata n/a
A few other cars....
Jerry a.k.a. 'FoundSoul'
DIYAutoTune.com
'91 Miata BEGi S3 GT2560 w/ MSPNP - 14.1psi - 253whp, 232wtq
'95 Miata n/a
A few other cars....
#15
Supporting Vendor
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iTrader: (5)
Join Date: Jun 2006
Location: Duluth, GA 30097
Posts: 803
Total Cats: 0
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
You did say you flashed the unit with the 'without AFM' firmware, you must then reload the base map as the firmware doesn't have the proper base settings. This is what caused these settings to be wrong, and what has pretty much definitely burned out your ignitor now. Thankfully you can find used ignitors pretty cheap from Rspeed or Mazmart usually.
Read the manual closely as mentioned, when you flash the firmware you were right to unplug the ignitor when flashing, but you also must leave it unplugged until you reload the base map. Do that and you'll be fine (once you have a good ignitor).
Read the manual closely as mentioned, when you flash the firmware you were right to unplug the ignitor when flashing, but you also must leave it unplugged until you reload the base map. Do that and you'll be fine (once you have a good ignitor).
__________________
Jerry a.k.a. 'FoundSoul'
DIYAutoTune.com
'91 Miata BEGi S3 GT2560 w/ MSPNP - 14.1psi - 253whp, 232wtq
'95 Miata n/a
A few other cars....
Jerry a.k.a. 'FoundSoul'
DIYAutoTune.com
'91 Miata BEGi S3 GT2560 w/ MSPNP - 14.1psi - 253whp, 232wtq
'95 Miata n/a
A few other cars....
#16
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
yes my mistake. missed that in the manual:(
do you have it in swedish?![wink](https://www.miataturbo.net/images/smilies/wink.gif)
i thougt the without afm fuel thing was the map. so i didnt load the map afterwards.
but thanks to this forum and you guys![Biggthumpup](https://www.miataturbo.net/images/smilies/biggthumpup.gif)
my car is nu upp and running![](https://www.miataturbo.net/images/smilies/smile.gif)
i mannaged to not burn my ignitor so the car fired upp nicely![](https://www.miataturbo.net/images/smilies/smile.gif)
so thanks again guys.
i will surely come back later with more problems
do you have it in swedish?
![wink](https://www.miataturbo.net/images/smilies/wink.gif)
i thougt the without afm fuel thing was the map. so i didnt load the map afterwards.
but thanks to this forum and you guys
![Biggthumpup](https://www.miataturbo.net/images/smilies/biggthumpup.gif)
my car is nu upp and running
![](https://www.miataturbo.net/images/smilies/smile.gif)
i mannaged to not burn my ignitor so the car fired upp nicely
![](https://www.miataturbo.net/images/smilies/smile.gif)
so thanks again guys.
i will surely come back later with more problems
![wink](https://www.miataturbo.net/images/smilies/wink.gif)
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