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Emu is connected to my SR20DET for some time now, however only tuned with air flow adjustment and ignition adjustment. 2 days ago connected injectors to emu in the add/subtract configuration. Engine running very lean.
Does anyone have a properly working emu on their SR. Is the injector adaptor required when connecting the injectors to the emu.
i had the blue in my old car and i was always under the impression that if your tuning your injectors you would need the injector harnes properly installed. how else would you play with the injectors?
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b13 with high compression and S4's
i use emu and just folloed directions on wireing injectors in ad and subtract form. please check over and make sure it is done right and jumpers in the emu are set correctly
the emu hrness has the injector wires you simply cut the wires and have imput and out put wire's for ad and subtract. if you re just dding you can tap into the wires. it is ll in the instalation maual.
the way you re talking it makes me beleav you are useing a emu with emblue harnesses? cuase the emu harness comes with all you need exept for option harnesses for a/f or map ect
I do have an ultimate harness. But since you dont know about the injector adaptor, it means that you have not installed it and it is not required for the SR20. So that answered my question.
For information, an injector adaptor is required for some engines when connecting the emu in add/subtract configuration. This eliminates the check engine light and prevents the ecu from going into limp mode. see attachment.
Today i tried reconnecting the EMU in ADD/SUBTRACT configuration. I was able to get proper air/fuel ratios, however to acheive this I had to enter atleast 80% on the entire INJ MAP. Is this value typical when in this configuration?
Anoyher problem is when the gas pedal is released after revving the engine, the engine just dies and I would have to tumble for a while before I can get it to start again. IF gradually release the gas pedal, really coax it, everything is fine.
Any ideas?
I then conected the unit in ADD ONLY config. and it works fine.
If I'm changing to larger injectors, do I need to be in ADD/SUBTRACT config, or will ADD ONLY work??
very intersting . with larger injectors oviusly you need to use ad and subtract.
i worry you hve dip pin not right are something of that sort are you may haf a unit problem.
i hve a ecu for 370cc injectors I conected the unit makeing no changes and noticed no diferents at all. now i run nissmo 740cc injectors and removed the maf. i hve no lean issues but it takes loads of time to tune right nd get drivability good with my set up.
is their something in your set up i am missing like maf change are nything like that ?
their are anti stall settings. im not sure what is up with your cr but i have never needed to use them.
i sudgest seting the ignition of set angle so correct ignition timeing can be monitored an data loging to find out what is the problem.
im most likely not the best tuner but with data log and time i have made the car run really good. the emu is a really good unit but with out a dyno it is hard to quickly tune.
if you are useing stock injectors for your ecu their is no need to enter anything in the ij seting as far as sie and lag. removeing the air fow adjustment my be needed. ***5t safve all maps and data logs so you can review them and seee what works best
You maybe on to something with the timing. I just checked the ecu codes and I'm getting Code 11 and 21. Which I beleive is crank angle sensor signal and ignition timing. I will get this checked out first then try again.
Thanks for the input so far. I will give feedback when the checks are carried out.
Today i tried reconnecting the EMU in ADD/SUBTRACT configuration. I was able to get proper air/fuel ratios, however to acheive this I had to enter atleast 80% on the entire INJ MAP. Is this value typical when in this configuration?
Anoyher problem is when the gas pedal is released after revving the engine, the engine just dies and I would have to tumble for a while before I can get it to start again. IF gradually release the gas pedal, really coax it, everything is fine.
Any ideas?
I then conected the unit in ADD ONLY config. and it works fine.
If I'm changing to larger injectors, do I need to be in ADD/SUBTRACT config, or will ADD ONLY work??
I think with any size injectors, you're going to want to first subtract fuel (during idle) and then once the RPM's rise and boost hits, you want to add fuel. If you don't subtract fuel at idle, the fuel will flood the engine and it won't start. So you should keep teh car in add and subtract.
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2000 Infiniti G20 Turbo(SR20DE+T)
With 5spd LSD Swap
Koojo
I'm getting a prblem when connected in ADD/SUBTRACT, I need to add atleast 80% to injector duration throughout the map to get proper air/fuel ratios with all other maps set to zero. Plus when the gas pedal is released, the engine dies. That's why I'm in ADD only.
I'm trying to clear two ecu codes 11 and 21 which deals with crank angle sensor and ignition timing. I'm hoping that this is the source of the problem.
can you show anny of your settings ? perhaps do a little data loging ?wi5th a lil time i may spot something for ya.
im rarely on line and for some resone sr20forum does not sent me emails. Im pretty sure in my forum settings i hve it set to but it does not do it
The Greddy instructions for Cam/Crank Angle sensors are wrong: cam angle goes on Pin 30 of the OBDI ECU (Codes 11 and 21 might be because of this? Is timing reading correctly on datalogging if you select to read timing from crank/cam angle and not from the rpm signal?).
Also, there is no need to connect the injector ground.
NO INJECTOR ADAPTOR necessary.
At least that is my experience with the EMU and SR20, so hope this applies / helps.
I think with any size injectors, you're going to want to first subtract fuel (during idle) and then once the RPM's rise and boost hits, you want to add fuel. If you don't subtract fuel at idle, the fuel will flood the engine and it won't start. So you should keep teh car in add and subtract.
The EMU has a setting for larger injectors so this doesnt happen (BEFORE AND AFTER Injector size and Lag time).
The Greddy instructions for Cam/Crank Angle sensors are wrong: cam angle goes on Pin 30 of the OBDI ECU (Codes 11 and 21 might be because of this? Is timing reading correctly on datalogging if you select to read timing from crank/cam angle and not from the rpm signal?).
Also, there is no need to connect the injector ground.
NO INJECTOR ADAPTOR necessary.
At least that is my experience with the EMU and SR20, so hope this applies / helps.
It is an OBD1 ECU. At present, the crank and cam angle wires from the EMU is not connected. When it was connected the readings were not correct on the data logging. I'll have to confirm whether or not I had corrected the cam angle Pin 30 connection.
"(select to read timing from crank/cam angle and not from the rpm signal)" do you mean select to read RPM Signal Type from Crank angle??
Anyway I'll be out of the country for a couple of months so I may not get a chance to check anything before i go.
Thanks for the help guys, when I do get back I'll post whatever I find.
