MS PNP 2 Miata backfires but wont start...
11-17-2013, 08:38 PM
#1
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MS PNP 2 Miata backfires but wont start...
Hey guys heres the deal 1992 miata 1.6l.
megasquirt PNP 2
GReddy tdo5h turbo kit
440cc injectors....
stock FPR
Stock TIMING (100% accurate)
STOCK IGNITION
AIT sensor (MAF DELETE)
She starts up and idles on the stock ecu but its obiously bad because the injector size etc.....
We uploaded the new firmware 2x on the new ecu.... We use the settings as per diy auto tune suggests for the 1992 miata.
IT wont start up and run on the MS like it should...
CAN SOMEONE HELP WITH ANY INFORMATION IVE BEEN at this for days and am ready to burn this god damn miata to the ground... THANKS
megasquirt PNP 2
GReddy tdo5h turbo kit
440cc injectors....
stock FPR
Stock TIMING (100% accurate)
STOCK IGNITION
AIT sensor (MAF DELETE)
She starts up and idles on the stock ecu but its obiously bad because the injector size etc.....
We uploaded the new firmware 2x on the new ecu.... We use the settings as per diy auto tune suggests for the 1992 miata.
IT wont start up and run on the MS like it should...
CAN SOMEONE HELP WITH ANY INFORMATION IVE BEEN at this for days and am ready to burn this god damn miata to the ground... THANKS
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11-17-2013, 09:04 PM
#2
Hey guys heres the deal 1992 miata 1.6l.
megasquirt PNP 2
GReddy tdo5h turbo kit
440cc injectors....
stock FPR
Stock TIMING (100% accurate)
STOCK IGNITION
AIT sensor (MAF DELETE)
She starts up and idles on the stock ecu but its obiously bad because the injector size etc.....
We uploaded the new firmware 2x on the new ecu.... We use the settings as per diy auto tune suggests for the 1992 miata.
IT wont start up and run on the MS like it should...
CAN SOMEONE HELP WITH ANY INFORMATION IVE BEEN at this for days and am ready to burn this god damn miata to the ground... THANKS
megasquirt PNP 2
GReddy tdo5h turbo kit
440cc injectors....
stock FPR
Stock TIMING (100% accurate)
STOCK IGNITION
AIT sensor (MAF DELETE)
She starts up and idles on the stock ecu but its obiously bad because the injector size etc.....
We uploaded the new firmware 2x on the new ecu.... We use the settings as per diy auto tune suggests for the 1992 miata.
IT wont start up and run on the MS like it should...
CAN SOMEONE HELP WITH ANY INFORMATION IVE BEEN at this for days and am ready to burn this god damn miata to the ground... THANKS
Last edited by bahurd; 11-17-2013 at 09:16 PM.
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11-17-2013, 10:21 PM
#3
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Sorry I'll post a 10 second cranking log tomorrow. I would now but the car back fires so loud after cranking my neighbors thought it was a shotgun....
Engine 1992 1.6 litre
Weisco pistons
Eagle rods
Oem bearings
Oem crank
Arp studs
Felpro hg
Just had the head cleaned, valve job, etc
New timing belt and water pump
Etc....
Engine 1992 1.6 litre
Weisco pistons
Eagle rods
Oem bearings
Oem crank
Arp studs
Felpro hg
Just had the head cleaned, valve job, etc
New timing belt and water pump
Etc....
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11-18-2013, 12:17 PM
#7
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When I go I to basic settings and fuel calculator I enter 1600cc in engine displacement. The go down to injector flow and enter 440 then click cc/min and burn it and it comes up with a calculated fuel number on its own? Is this wrong
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11-18-2013, 12:43 PM
#11
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heres the datalog....
Keep in mind guys after this cranking session.... along with every other one.. SHE BACKFIRES SO LOUD AND IM TALKING IT SOUNDS LIKE A BOMB..... MY 400whp 240sx has antilag and these backfires are louder...
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11-18-2013, 12:53 PM
#12
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that means it's dumping in a crap ton of fuel and then igniting all at once.
so that happened in about 4 seconds of cranking? are you sure they are good 440cc injectors? could they be bad or flowing much more than 440cc? the PW at cranking isn't THAT high.
why not try to lower the req_fuel more and more until it starts. that will give you an idea if it;s the fueling or if something else is at play.
this is a mspnp2? do you have a vTPS? do they make any notes about not using the factory TPS?
so that happened in about 4 seconds of cranking? are you sure they are good 440cc injectors? could they be bad or flowing much more than 440cc? the PW at cranking isn't THAT high.
why not try to lower the req_fuel more and more until it starts. that will give you an idea if it;s the fueling or if something else is at play.
this is a mspnp2? do you have a vTPS? do they make any notes about not using the factory TPS?
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11-18-2013, 12:57 PM
#13
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DIYPNP MegaSquirt installation for the Mazda Miata
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11-18-2013, 01:04 PM
#15
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I actually just went out and took a look at my MAF CONNECTOR.... There is 7 pins on it.... DIY's SITE SHOWS ONE WITH 5??? and the wire colors dont match per diy auto tunes website..... so i unplugged the sensor at the intercooler until i can figure out what the hell this wiring is now....
mine...
THERES....
mine...
THERES....
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11-18-2013, 01:14 PM
#17
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that means it's dumping in a crap ton of fuel and then igniting all at once.
so that happened in about 4 seconds of cranking? are you sure they are good 440cc injectors? could they be bad or flowing much more than 440cc? the PW at cranking isn't THAT high.
why not try to lower the req_fuel more and more until it starts. that will give you an idea if it;s the fueling or if something else is at play.
this is a mspnp2? do you have a vTPS? do they make any notes about not using the factory TPS?
so that happened in about 4 seconds of cranking? are you sure they are good 440cc injectors? could they be bad or flowing much more than 440cc? the PW at cranking isn't THAT high.
why not try to lower the req_fuel more and more until it starts. that will give you an idea if it;s the fueling or if something else is at play.
this is a mspnp2? do you have a vTPS? do they make any notes about not using the factory TPS?
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11-18-2013, 01:16 PM
#18
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also the injectors being bad really isnt a option keep in mind guys that this car runs and idles fine on the stock ecu.... just doesnt have a maf and struggles a bit because the 440cc on stock ecu with no maf lol
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11-18-2013, 02:09 PM
#20
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So I messed with a few more things.... I just can't get it to start on this megasquirt, I can like get it to fire for a second and it dies out..... So something in my tune is wayyyyyy off. I someone could look at that and let me know that would be awesome.... Also my injector should be unlimited fire? Or semi sequential?
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