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-   -   Not starting (https://www.miataturbo.net/megasquirt-18/not-starting-13608/)

UrbanSoot 10-25-2007 02:48 AM

Not starting
 
So I finally got my MS to read everything and with harness from Braineack it should fire up but... Motor turns over and tries to start but doesn't...
I tried MSPNP settings for 9495 version - nothing :/

Savington 10-25-2007 03:26 AM

Req fuel is set? IIRC, you have to reset your cranking pulsewidths as well. You did both of those?

neogenesis2004 10-25-2007 03:34 AM

If you get fires but its not starting, maybe a backfire after enough cranking, try swapping the ign wires on your MS board and firing it up then. Alot of times they are just backwards. Just try it, can't hurt anything.

Braineack 10-25-2007 09:11 AM

I'm pretty sure i matched his outputs on the MS board to match his harness. If they were backwards and it was trying to start, he'd get really weird pulses of the engine trying to turn the crank back down on itself.

try setting your tps values. and make sure your laptop is hooked up and when you crank you see rpms. I put your tach signal on 4F which should be correct.

UrbanSoot 10-25-2007 12:29 PM

i triple-checked every wire - its correct. ill try to calibrate tps tonight and play with cranking pulse widths.

ps: i get from 200 to 500 rpm on crank.

Braineack 10-25-2007 12:38 PM

if it sees rpm and you're getting spark which you said you were, and the ecu controls fuel, it should start up.

listen to make sure the coil outputs aren't reversed. it will try to pop and almost stop trying to crank. whats happening is it's firing when the piston is still traveling up. however, I'm 95% positive it wont.

UrbanSoot 10-25-2007 12:47 PM

it doesnt. it tries to start but it seems like it doesnt get enough fuel. and i had a backfire on one of the extensive cranks.

Braineack 10-25-2007 01:15 PM

backfire usually means too much fuel ;)

UrbanSoot 10-25-2007 01:45 PM

well, after 20 cranks which didnt work i bet there is enough fuel in engine to backfire ;)

UrbanSoot 10-26-2007 01:12 AM

so i reversed my spark plug wires and it started! but extremely roughly... and then... after 10 minutes... it died completely and now it wont start at all!!!!!!!

it was running extremely rough and was sputtering until i loaded 1.6t map - then it was all good for about 4-5 minutes and then it died...

i reversed my wires back, hooked up stock ecu, and now i get no spark!! did i fry my coils or just messed up wires??

cjernigan 10-26-2007 01:33 AM

Was your spark setting set to inverted or non-inverted? What was your dwell set to?

UrbanSoot 10-26-2007 01:45 AM

i used mspnp 9495 settings.

Ben 10-26-2007 01:46 AM

Do you have a 9495 PNP?
















So then why did you use those settings? :slap:

UrbanSoot 10-26-2007 01:48 AM

well, they worked :)

Ben 10-26-2007 01:52 AM

yup, she flew. all the way to the scene of the crash.

Maybe you'll read up on why that was a bad idea, replace what you fried, and fix your mistakes.

UrbanSoot 10-26-2007 01:54 AM

so do you think i fried my coils?

cjernigan 10-26-2007 01:55 AM

http://www.allfordmustangs.com/forum...oot_myself.gif
Not sure what kind of dwell they're running, though it should have been set right in terms of being setup for non-inverted spark.

UrbanSoot 10-26-2007 01:58 AM

it was 5.5 crank and 4.4 running...

UrbanSoot 10-26-2007 01:59 AM

http://www.miatamania.com/Shop/ViewP...22&SortOrder=4

is that the new toy for miata?

cjernigan 10-26-2007 02:00 AM

I run 2.6 on my '99, no idea what the 96 needs.


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