EMU 99 Miata Issues
#1
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?
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?
#2
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
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
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.
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
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
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.
Last edited by MX5-4me; 04-16-2008 at 10:19 PM.
#4
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.
#10
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
make the scaling of the maps more appropriate.
i used the 5v jumper but i have a 2001.
lets get that baby running
#15
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..
I'm going to change my map scale closer to the one before.. i really don't see me running 29 Relative PSI
Here are the maps as they stand now..
Much happier with these..
I'm going to change my map scale closer to the one before.. i really don't see me running 29 Relative PSI
#17
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..
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..
Last edited by MX5-4me; 04-24-2008 at 09:28 PM.