MSPNP woes...
07-04-2010, 05:11 PM
#1
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MSPNP woes...
Installed the MSPNP today (90-93). I went with the NO AFM firmware and msq. And before anybody asks... yes, the fuse was pulled out (forever), and the igniter was disconnected while updating the firmware and msq. I removed the airbox, and installed a short section of pipe connected to a cone filter, where the IAT is embedded into the cone filter (into the rubber neck area).
I set the timing via the procedure shown on the site. When all was said and done, the timing light showed ~14 degrees, and so did megatune.
I took the car for a drive, and right when I passed 2000 rpms, steady throttle, the fuel cuts out - or something...and then comes back in, then goes out...and etc. I didn't want to try to even get it above 3000 rpms.
Even when the car is idling... if i press the throttle to go >2000 rpms and hold it there...it'll stutter and and etc.
On the megatune screen, the "pulse width" on the injectors are going to zero when the cutout/hesitation occurs. After my frustration, I uninstalled the mspnp, and reinstalled my stock ECU...and now all is well.
Any ideas as to why this is happening?
I set the timing via the procedure shown on the site. When all was said and done, the timing light showed ~14 degrees, and so did megatune.
I took the car for a drive, and right when I passed 2000 rpms, steady throttle, the fuel cuts out - or something...and then comes back in, then goes out...and etc. I didn't want to try to even get it above 3000 rpms.
Even when the car is idling... if i press the throttle to go >2000 rpms and hold it there...it'll stutter and and etc.
On the megatune screen, the "pulse width" on the injectors are going to zero when the cutout/hesitation occurs. After my frustration, I uninstalled the mspnp, and reinstalled my stock ECU...and now all is well.
Any ideas as to why this is happening?
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07-05-2010, 03:19 AM
#5
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it'll go above 2000 rpms... it's just that, power comes in and out and in and out and etc - and it's not gentle in any way..... it literally feels like i'm flooring it - letting go - flooring it - letting go in second gear... but i'm not doing that...i'm just lightly/steadily pressing the accelerator.
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07-06-2010, 10:05 AM
#8
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Have you captured a datalog when this is happening? Send it over to our tech guys at websales@diyautotune.com and we can probably see exactly what's going on and help you resolve it.
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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....
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