Nathan Macpherson

Good morning and happy super bowl Sunday on this day it's posted.
currently I have an 99 NB Miata turbo running a MS2 It does not receive spark or tach movement when starting. The engine cranks and fuel is working as I can smell the aem fuel pump pumping fuel into my 1050x injectors.
Basically what happened was I relocated oil line to run a belt for power steering and wiring harness for IAT sensor and some other 3 wire plug with a yellow clip got snagged on the belt and the wires came in contact. Immediately shutting the car off. I blew the fuel inj fuse replaced and replaced EGI MAIN relay. I also tried can angle sensor with no prevail. I have a Fab 9 coil pack sending unit and stock coil pack at my disposal tried hooking both up and still no spark. If anyone has an idea of how I can get this running it would be great. Or any good direction I can hook my ms2 to my computer and send data. I would like to avoid paying hundreds of dollars for something that may be simple fix. Thank you guys

SpartanSV

Post a log of cranking and your tune.

Nathan Macpherson

I attatched log file and tune. I noticed at on position the TPS is at 125% is that even possible is there a fuse or relay that controls the TPS or could it be the TPS itself?

SpartanSV

TPS, coolant temp, IAT are all messed up. You're not getting any cam/crank sync so the injectors and coils aren't firing.

I believe the 5v reference output from the megasquirt is what all of those have in common. I would measure voltage on that wire with the key on.

Nathan Macpherson

So far I have replaced the iat sensor, tps sensor, cas and cks, and egi main with no avail. On the msq2 there should be 4 lights on 2 being power and sync the third should pulse for tach sync and it does not. I am receiving proper voltage to my sensors. Any other ideas?

andyfloyd

Crankshaft position sensor will cause no spark and tach issues. Check the sensor and the Gap between the crank wheel. A credit card is a good way to set the Gap.

SpartanSV

Please explain in detail what steps you took to determine you have proper voltage to the sensors.

A composite log would be helpful as well. I don't think cam and crank utilize the 5v reference so that is likely a separate issue.
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Nathan Macpherson

so I didn't have spark or tach movement from the moment iat sensor wires crossed

Nathan Macpherson

I took a multimeter with car acc to on and tested voltage coming out of the plugs for all sensors.
is the datalog I provided not a composite locate? I'm new to msq2pnp software

SpartanSV

What was the reading at the sensors?

No that is not a composite log.

Nathan Macpherson

5v and 12v where its needed how do i get a composite log

curly

iTrader: (25)

From the gauge cluster screen, click on "diagnostics and high speed loggers" tab, click "save to file" name it something like "no start" click "start", then crank your engine for ~10 seconds, click "stop". Upload this file.

curly

iTrader: (25)

You also need to calibrate your TPS, assuming no other wiring is wrong with it. At 138%, it'll be in flood clear mode and not inject any fuel.

Nathan Macpherson

Ok so I got combustion after messing with it. But won't run yet i had it hooked up to my other car and i would get tach movement but when I dont have it hooked up no movement so I know I need a batter for sure cca's are bad. What else can I check for so I know I have good spark. Also for tps that I replaced I was looking online it says to adjust it while car is running cant really do that. Anything helps guys i ended up swapping 203 relays in the front and Uninstaller reinstalled ecm to get it to almost start. I'm getting there.

SpartanSV

You calibrate the TPS in tuner studio. Coolant and intake temp sensors are probably not configured properly either.

Nathan Macpherson

here is the log that you said to make I hope you can make something out of it its so close to starting when it doesnt flood anything helps,
thank you

Nathan Macpherson

ok I calibrated TPS it starts up now but polarity is backwards on tps so it idles awful and coolant isn't reading but temp is how do I calibrate this

sixshooter

iTrader: (12)

Tools tab in TunerStudio