lukemin22

So, this is my first on here... i recently put a vvt engine in my car and installed mspnp2 from DIY. im new to megasquirt, and really need some help with some things.
first off, im not getting spark from my 01 coils (followed the wiring from savington)
injectors dont seem to be firing, based on the fact hat ive cranked it alot and theres no fuel on spark plugs (also followed savington)
on tunerstudio under ignition settings i have 99-00 trigger wheel, which after research i found that the 01 trigger wheel is the same as the 99-00-maybe this is a problem
should i wire the cam signal to the options port instead of what savington's post shows? if not, what changes in ms should i make?

also, im in southern maine... so maybe theres somebody near me that knows alot about ms and miatas that would come help? doubt it but worth a try

wackbards

iTrader: (2)

Make sure you read this thread:

https://www.miataturbo.net/engine-pe...athread-80469/

Use the spark and injector test tool to see if you are driving the correct cylinders for each.
Use the high speed logger feature to see if you're pulling cam/crank signal.
Also, you can't control VVT with that MS.

lukemin22

i have read the savington post, that is actually where i based my wiring off of. i will have to use the injector and spark test tools when i get back to the car later on.

thanks!

any other help would be greatly appreciated
like am i doing the right thing by selecting 99-00 trigger wheel? also, using the savington wiring for the cas-cam/crank will the ms see the inputs for them both?

Cutthroat912

I've done this same swap and didn't really run into these kinds of issues fortunately. You can do a composite log to see if you're getting the cam and crank signals. If you wired the cam and crank signals and deleted the ignitor per the text instructions and not the picture in the first post of that thread, then you should be wired correctly. I would start there and then try and tackle wiring and potential ECU issues. Any reason why you went with the MS2 instead of a more capable ECU for your application?

wackbards

iTrader: (2)

Yeah, the trigger wheels are the same for 99-05. Cam sensors are in different locations, but IIRC the 99-00 setting is what you want. I don't remember if you want to set it to leading or trailing edge though. You should use the high speed logger tool in tuner studio and post up a pic of the log. You have to crank for like 20 seconds, and it will suddenly produce ~5 logs. poke through the logs until you find one with square wave looking lines. This will tell you if you're getting good cam/crank signal.

Also, just double & triple check your fuel lines. It's stupid easy to get them switched by accident.

Cutthroat912

Also another note about fueling, before I did my swap I installed the MS in the car and left the AFM for an easy switch back to OEM while I was getting the hang of TunerStudio. After I did the swap and deleted the AFM my fuel pump would no longer turn on with the ignition. All I did was jumper the fuel pump in the diagnostics box. Brian covers this in his install section on Trubokitty.com. This may or may not be related to your issues.

lukemin22

thanks guys, im headed to the car shortly and ill try to make some logs and load them up here. im pretty positive i have the fuel lines right, one question i guess i may have is, i have the na fpr mounted on the same end of the aftermarket fuel rail as the feed line.. this shouldnt cause issues, correct?
also, should i have the "spark output" going high or going low? i hope i didnt just wreck my coils and that the issue.... like a dummy

lukemin22

thanks! i did follow the text below the picture.. i went with the ms2 because i had bought it last summer and never installed it on my 1.6... the ms2 should still be able to run the vvt engine, just not be able to run the vvt? when i get it running i think ill just go with the minisquirt vvt controller

lukemin22

This is the composite log I got... does this look alright?

Kdog47

Hey just as a heads up if the motor sat for a while the injectors could be seized. This happened to me with a junkyard motor. I had fuel pressure and spark and NOID lights, but no gas. I was able to free mine by running solvent through them and tapping them (not suggesting this tho lol) I saw the same issue on another forum too

lukemin22

thanks for the heads up. this may be one of the issues on the list... just tested the fuel pressure and there is none,

i tested the trigger wires to the coils, and theyre getting steady 5V. also, cyl C and D trigger wires from ms is off and on 12V while key is on... any ideas from anyone? i really wish i knew somebody who knows how to work a megasquirt and could come help me with this.... pulling my hair out atm

does anybody know if the composite log looks alright?

wackbards

iTrader: (2)

Composite log looks OK, but I'm not the master of interpretation.
No fuel pressure... can you hear the pump priming? If yes, are you SURE you got the fuel lines plumbed correctly?
If no, did you pull the ST_SIG fuse? If you didn't, then you done burnt yer MS. It's gonna need to get fixed.

lukemin22

i did pull the st sign fuse, thank god! and i dont hear the fuel pump.. thought i did yesterday but alas... im trying to get a guy in mass. to come up and help me figure this out.
pressure line goes to rail, fpr goes to return line.. correct me if im wrong

wackbards

iTrader: (2)

There are 2 fuel hard lines on the pax fender: the rear most line goes to the rail, and the forward most line goes to the FPR.

How are you determining that there is not fuel pressure?

lukemin22

im using a snap-on fuel pressure tester. when i pulled the lines out there was no pressure either, even with the key on and the ms powered up.

lukemin22

im fairly certain theres an ecu issue, or im doing something wrong with the setup on tunerstudio because i honestly feel like im in over my head right now with these two things.. the problem is, i dont wanna spend 200$ an hour for somebody at a tuning shop to diag it. hopefully i can get this guy from mass. to come help me out soon. untill then, wish me luck! and thank you for the help!

im sure that youll hear from me again

skylinecalvin

iTrader: (2)

Before you pay somebody, why not start from more of the basics. Do you hear the fuel pump priming? You can use the diagnostics tab in tuner studio to test each coil and injector firing as well. I don't run a MS so I don't use tuner studio so the diagnostic stuff may be called something else but I recall it being one of the right most tabs. If you don't hear the fuel pump priming, maybe your fuel pump is bad or you're not getting a signal to the FP. have you checked either of these?

lukemin22

i dont hear the fuel pump priming, nor do i have fuel pressure. i havent checked for power to the pump, but i am assuming there is not any power being sent to the fuel pump. thats why i say i think theres a problem with the ms or how i have it hooked up. i have tried to test for coil triggers, im not getting any. i have a 12V, a grd, and a constant 5V to the coils...not sure if that is right. i havent tested the injectors yet at the plugs, but the 3rd and 4th injector trigger wires have off and on 12V power with the ms on.. which im pretty certain is not right.. i know the fuel pump is alright because it worked before i installed the ms... maybe i should reinstall the stock ecu to see if the fuel pump works then..
thanks for the help, any other ideas or input would be appreciated

skylinecalvin

iTrader: (2)

Re-installing stock ecu sounds like the easiest way to check if it's the ms.

Cutthroat912

Have you tried jumpering the fuel pump in the diagnostics box?