Honda d17a2 ms3 rpm issue

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EM2CIVIC
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Honda d17a2 ms3 rpm issue

Post by EM2CIVIC »

Hello i'm new here and this is my first megasquirt build.

I've been having a hard time trying to get the rpm gauge to work on tunerstudio. I'm planning to wire the ms3 parallel to my stock ecu, and right now I just have the crank position sensor connected. I believe the car uses a hall effect sensor even though the msextra manual says that my engine uses a vr sensor. Does any one have any ideas? Any help would be greatly appreciated.
billr
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Re: Honda d17a2 ms3 rpm issue

Post by billr »

If there is any uncertainty about what type the CKP sensor is, provide some details so we can help verify. A common P/N for the sensor, like from Standard Motor Products would do; or the model (Civic?) and year Honda this is out of. Engine size and config too, if there were optional engines.
EM2CIVIC
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Re: Honda d17a2 ms3 rpm issue

Post by EM2CIVIC »

billr wrote:If there is any uncertainty about what type the CKP sensor is, provide some details so we can help verify. A common P/N for the sensor, like from Standard Motor Products would do; or the model (Civic?) and year Honda this is out of. Engine size and config too, if there were optional engines.
Its a 2002 Honda civic ex. 1.7L

The sensor uses a signal wire a ground and a 12v power source like a hall effect sensor would. This guy scoped them http://www.msextra.com/forums/viewtopic ... 91&t=46322
EM2CIVIC
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Re: Honda d17a2 ms3 rpm issue

Post by EM2CIVIC »

The sync loss counter on tunerstudio shows 0 but the lost sync reason gauge shows reason 86 and I cannot find any information on that code.
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Re: Honda d17a2 ms3 rpm issue

Post by jsmcortina »

I'm pretty sure that this wheel pattern requires crank and cam to be connected or it will never sync up.

James
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EM2CIVIC
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Re: Honda d17a2 ms3 rpm issue

Post by EM2CIVIC »

I finally bought the expansion board and it doesn't seem to be working. The composite logger doesn't show anything for the cam input, the pots are adjusted 6 turns counter-clockwise and JP7 does not have a jumper. Is it because i'm using the free version of tuner studio? I don't want to pay for the full version until I know for sure that this megasquirt works.
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Re: Honda d17a2 ms3 rpm issue

Post by billr »

No JP7 means there has to be a pull-up in the sensor or wiring. Are you sure there is such an external one? My recollection is that Hall sensors require only one pot to be about mid-way, the other being fully CCW. The TS version has no influence on this issue, TS Lite will work.
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Re: Honda d17a2 ms3 rpm issue

Post by EM2CIVIC »

I got full rpm sync now, I had to adjust the zero crossing to 1.1 volts for the cam input. But now the engine seems to only be firing on one cylinder.
I wired coil 2 to cylinder 1, coil B to 2 coil C to 3 and coil D to 4, My firing order is 1342 so i made coil A fire first C second B third and D fourth. Do I have it wired wrong ?
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Re: Honda d17a2 ms3 rpm issue

Post by EM2CIVIC »

Thanks for the help every one it really meant a lot to me
Matt Cramer
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Re: Honda d17a2 ms3 rpm issue

Post by Matt Cramer »

It looks like the sync is OK - do you have a normal data log?
Matt Cramer -1966 Dodge Dart slant six running on MS3X
EM2CIVIC
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Re: Honda d17a2 ms3 rpm issue

Post by EM2CIVIC »

Matt Cramer wrote:It looks like the sync is OK - do you have a normal data log?

Sorry my last post kinda sounded sarcastic, but i had everything running thanks to the support of diyautotune and this forum.
EM2CIVIC
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Re: Honda d17a2 ms3 rpm issue

Post by EM2CIVIC »

Now it has a new issue, the engine wont rev past 4000 rpm. If i force the engine past 5000 rpm it will run fine. It doesn't have an issue in neutral though only when the engine is under load. Cylinder number 2 also randomly misfires or doesnt fire at all , but it doesnt happen in these logs. It was showing lost sync reason 86 and 87 i have no idea what that means? could my crank position sensor be broken or do i just need to readjust my pots?
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Re: Honda d17a2 ms3 rpm issue

Post by Matt Cramer »

You've got a "cliff" in the VE table where the VE is more than doubling, sending fueling through the roof.
Matt Cramer -1966 Dodge Dart slant six running on MS3X
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Re: Honda d17a2 ms3 rpm issue

Post by EM2CIVIC »

I added a knock sensor and went from 210cc injectors to 310cc at the same time so I wasnt really sure. I didn't expect over fueling to feel like a rev limiter though i thought it would have just bogged down. Thanks for the help
EM2CIVIC
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Re: Honda d17a2 ms3 rpm issue

Post by EM2CIVIC »

every thing was going well but now im only running on one cylinder it it shows lost sync reason 87 but i cant find any information about reason 87.
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Re: Honda d17a2 ms3 rpm issue

Post by Matt Cramer »

A lot of the codes aren't very specific, other than "the signal isn't what the code expects." Can you post a tooth and a composite log of the new loss of sync issue?
Matt Cramer -1966 Dodge Dart slant six running on MS3X
EM2CIVIC
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Re: Honda d17a2 ms3 rpm issue

Post by EM2CIVIC »

i have a composite log but i have to wait for it to loose sync again to start a tooth logger.
It only happens when i stall it and start it, I accidentally stalled it while making a u turn and then it was only firing one cylinder and i was holding up cars haha it was so embarrassing.
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Re: Honda d17a2 ms3 rpm issue

Post by Matt Cramer »

A loss of sync on startup is pretty common as this is the hardest time to sync up, but normally it should remain synced after it syncs up successfully.
Matt Cramer -1966 Dodge Dart slant six running on MS3X
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Re: Honda d17a2 ms3 rpm issue

Post by EM2CIVIC »

I noticed that im stalling the car a lot now, I have to rise the rpms a lot more then I use to. Do I need to raise my idle? Its really pissing me off its so hard to hill start now I basically have to launch or let the clutch slip, I stalled it 5 times today. when it stalls and a restarts it fires on one cylinder and wont fully start until I floor it.
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