EMU 99 Miata Issues
 

I'm having the Warm Idle issues I’ve searched here and haven't been able to extrapolate the fix. From what I’ve read this is how we should set up the injectors.. I have RX-7 -2020 (550cc)

Before injector set to 280cc and after Injector set to 620cc

Lag time set to .64 Before and .74 after

Does this sound correct or am I reading wrong?



I'm also getting the a P0325 Knock Check Engine Light. Again I searched and I don't see the solution for this.. We have JP13 and JP14 set to open and everything appears to be wired correctly. Does anyone have the knock logging set up and working on a 99 Miata? What are you settings?

I got my car idling at stioch tonight.. Here are the settings I changed to do so..


The NBs run at around 60 PSI rail fuel pressure so I used RC Engineering’s Fuel Flow After Pressure Change Worksheet and got the numbers below..

http://www.rceng.com/technical.aspx

http://blindmind.smugmug.com/photos/...01_8LdEw-L.jpg


I have a 99 the stock injectors run at ~240cc at 43.5 psi after the conversion to 60 psi they flow ~265cc

The injectors i have are Denso 195500-2020 which flow 550cc at 43.5 after the conversion to 60 psi they flow ~645cc

I have no logic as to why I need to plug in the .90 msec lag time. I seriously doubt there is that much difference between the Stock injector and the RX-7 injector.. Could be but I doubt it. Changing this alone made a big difference.


The next change was on my Injector Adjustment Map

http://blindmind.smugmug.com/photos/...22_ituJc-L.jpg

The final kicker was A/F Target Map in the idle RPM range. At first I set it to 14.7 and it ran way better but still idle surged maybe 100 RPM. Once I bumped it down to 14.0 it was all good.


http://blindmind.smugmug.com/photos/...79_azXWm-L.jpg

Thats good news, as I didn't think anyone was having luck with the RX-7 injectors. Also didn't think it was a good idea to mess with the injector map, or A/F target map under 0psi.

Yep i didn't think it was either but i didn't know how else to address the horrid Richness at idle.. without doing that i was idling at 11:1

With out bumping up the Injectors size because of the rail PSI i was idling at 9:1

without changing the target AFR it appeared to be fighting the OEM ECU for idle AFR.

Alright man, I'll try your settings on mine and see how if it'll work.

dont connect the knock sensor to the emu...you wont get it to work


and use the 12v ignition setup

I'm pretty sure I have it set up for 12V i'm going to pull it to varify my Jumpers again today.

it was set up for 12V ..:-)

Thats awesome. I can't wait until my new injectors come in so I can get down to the nitty gritty of tuning the car.

first of all the knock will not work u need to cut the wire feeding to the emu i did that and the light was gone. as for the injectors i would put in 230 in before and 550 in after with the lag time of 0.90 , 0 in the before lag time. i would not auto tune in non boosted cells.
make the scaling of the maps more appropriate.
i used the 5v jumper but i have a 2001.
lets get that baby running

Thanks for the input..

with the setting you explain here it would not idle and ran very rich.

post a em2 file with log of idle maybe we can go from there.

i'll try and get that for you tomorrow. I'm playing with Autotune right now.. when starting off with an autotune should my I/J Adj. Map1 be all zeros ??

http://blindmind.smugmug.com/photos/...48_jjdnF-L.jpg

And my A/F Target Map be filled out like this ??


http://blindmind.smugmug.com/photos/...24_hR34v-L.jpg

I just want to make sure i'm reading this correctly.

I've got my idle rock solid right now..

Been playing with it all afternoon.. Really starting to get smooth.. i've got a buddy that's going to help me tune it tomorrow.. it's a lot easier to do with someone in the passenger seat running the laptop while someone else is driving.

Here are the maps as they stand now..

Much happier with these..

http://blindmind.smugmug.com/photos/...04_YsmPs-L.jpg



http://blindmind.smugmug.com/photos/...80_EKA2w-L.jpg


I'm going to change my map scale closer to the one before.. i really don't see me running 29 Relative PSI

injector adjustment map looks better. the scaling like you said is to be changed and it will change the numbers as well even further. but keep us updated i am thinking about 550cc injectors maybe your maps will help.

Latest Map .. I made a bunch of changes... I also bumped my idle up using the recessed Phillips head screw on the Throttle Body*.. I had to bump it back up to 850-900 rpm with these settings but it's the most solid and gives me the right A/F off boost..

I still need to play around with ignition timing


Looks like I have some grounding issues when I turn on my headlights or when the Radiator fan kicks on my engine dies.. argh...

Use At Your Own Risk!!


*counter-clockwise brings idle up clockwise down. When you move it give it time to settle down.. do 1/4 turns or 1/8 turns at a time..

How's hot start with these settings? Any problems with that?

Just tried your map on my car. Idles solid but at around 10afr, way too rich, it's blowing smoke while idling. Other than that this fixed my hot start issue I think, I'm gonna play with it a little bit more and see what I can come up with. But big thanks for posting this!

Sweet guys, good to know.

Mine was as well then I bumped the idle up. Try adding 50-100 RPM to idle.

Alright I'll try doing that, it's idling at around 800rpms right now.

Hmm, idle didn't seem to do much. Still idles at ~9.5afr when fully warmed up, :(. And all the time when not in boost at runs very rich as well around 10-11afr. I'll see if I can fix this, any suggestions?

post some logs with file

Yes please post your EM2 and log files.. I’m idling between 13.2 and 15 which is pretty much stock.. I'd like to see what you are doing differently out of boost..

I'll post my map when I get home a little bit later, but it looks very similar to yours, I don't know what's going on. Could it be a bad injector maybe? I also have FM dual feed fuel rail but that shouldn't matter much at idle.

Here's my map, what do you think?

i would not mess with the idle adjustment settings for now. let your stock ecu try to idle. also in the af target tab under properties feedback cycle might be changed from 20 to something like 100 or 200 ms. only turn on the maps that are critical for now. maybe ignition, af target, injection, to get it running first than later mess with the other stuff. for simplicity purposes just start off with least active settings. ps, where did you ground your lc1 i am having ground offset problems it keeps recallibrating. by itself.

Try this one.. I only changed the Injector sizes..

My LC1 is grounded to the steering column under the dash, never had any problems with it recalibrating.

Thanks mx5-4me I'll try that, hopefully I can figure this out.

My car idling using the RusMan.zip map ..

did you ground all 3 wires at the same place? i did one at the engine bay area and it is giving me problems also where is your power coming from? thanks
maybe we can kill 2 birds with one stone here lol

If I remember correctly I've grounded all my wires to same location.

Damn dude, that idles is just perfect! Mine's not like that though, still around 10afr, I'll check all the connections in the engine bay, might be a vacuum hose or something like that, cause I have no idea what's going on with this. Thanks for your help though, I really appreciate it!

rus did you get your car to run? clear out the water adjustment map and try it than put everything at 0
i played with mine today and the car runs 10's like shit once i put in 0 everywhere it was fine good luck

I'll try that, thanks for a suggestion. It runs good, idles decent, just very rich. I'll see what the water adjustment will do.

Sorry to bump an old thread, but I now have the RX7 550cc and EMU.

I am using the rusman.zip map, with the idle control and water adj zeroed out, and I am still having the hot start issues.

Anything new come out of this?

No, I ended up buying smaller injectors, runs better now.

Just curious, I had some RX7 550s flow tested at injector rehab and they rated them at 550 at 2.25 bar -- is 2.25 bar the standard 43.5, or am I wrong in thinking it converts to something else?

Also listed at http://www.injector-rehab.com/kbse/flowrates.htm

I'm trying to nail down 550s and EMU on a 2001 before I go turbo, and I am having the ~5000 rpm rich stumble and idle problems.

Just buy a MS.

Thats what I did.

Did anyone solve the hot start issue with the 500cc? I just got some and am playig with the lag times I am having the hot start issue now. If anyone cares I posted the log and file to look at.

http://www.mediafire.com/?r53z77rqa8oil0p
http://www.mediafire.com/?e8bu92rg8gt9tmc

thanks

My hot start issue ends, if i connect my netbook with EMU Software. I don´t know why.

i meant 550cc. i tried the laptop but no use. i did get the 460 cc to idle perfect but the 550 are just a pain in the ass. cold start is great but once warm it will not even if i go in and change the lag times around. it does start if you push it and drop the clutch. maybe somebody has figured it out.

Have you tried this?
http://forum.miata.net/vb/showpost.p...47&postcount=2

Did not. I switched to MS seems that the support is leaning that way and the andances are great. Thanks for the post!!