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so in went my Sard 700cc injectors this morning, replacing the stock 444cc units. I got them from Nengun, so I'm sure they sent me the correct items. They popped in no hassle (even getting them into the fuel rail wasn't as bad as its made out to be), I reset my PFC injector settings to 63%, +0.18ms lag, and now the damned thing won't idle. It starts, idles fine, but once you drive a bit and then come to a stop, or even just rev the engine a touch in place, it loses its precarious balance and starts trying to die, surging back to 900rpm once a second, until it either finally conks out or some very delicate throttle work gets it back into balance. Turning off O2 feedback keeps the engine alive, but the seesaw action is still there, just not fatal to the idle.
The car was in basically perfect tune before the injector swap - I had the ignition tables mapped for snappy response and knock under 30 under full 1 bar boost to 8K rpm. Now the car bogs under throttle and I think it's running rich (I can hear lots of quiet pops and burbles from the tailpipe, plus it smells very petrolly, although I did toss the cat for a decat).
Although I had done a lot of tweaking to get my old map so good, I hit reset as I figure the 700cc injectors wont scale down in the same way as the 444cc and tried to get the unit to self-learn idle - the car died halfway during the second 10 minutes (with A/C on) after running rather smoothly up until then. Is there a particular procedure to get the car into self-learning idle mode? I reset the maps in the ETC menu, then set injector settings, then fired up the engine. Might I need to fire up the engine as soon as I reset, and then make my injector settings while the engine is running?
I do need to get my fuel pressure checked to insure that I'm at exactly 3bar and that my 444/700 correction is appropriate. But if my Nismo FPR is set at something a little different, then wouldn't changing the injector correction percent eventually hit the right number? I tried everything from 58% to 68% with no luck or joy. And with the 444cc units, and injector settings at 100%/0.00ms, everything was blissfully smooth.
I'll try to run the self-learning idle cycle again, global ignition and injector changes had no effect. Any other ideas? Could something have been missed in reconnecting everything? As I said, the car was running absolutely, immaculately and fastidiously perfect up to the moment we shut off the car and swapped the injectors.
The 700cc units were meant to allow me to boost higher, but my car is now a hobbling cripple. And I must do something straightaway - there is no one, no one at all in this country who can professionally tune a PFC. I mapped my original map successfully on my own, I hope I can get my car running smoothly again....
The car was in basically perfect tune before the injector swap - I had the ignition tables mapped for snappy response and knock under 30 under full 1 bar boost to 8K rpm. Now the car bogs under throttle and I think it's running rich (I can hear lots of quiet pops and burbles from the tailpipe, plus it smells very petrolly, although I did toss the cat for a decat).
Although I had done a lot of tweaking to get my old map so good, I hit reset as I figure the 700cc injectors wont scale down in the same way as the 444cc and tried to get the unit to self-learn idle - the car died halfway during the second 10 minutes (with A/C on) after running rather smoothly up until then. Is there a particular procedure to get the car into self-learning idle mode? I reset the maps in the ETC menu, then set injector settings, then fired up the engine. Might I need to fire up the engine as soon as I reset, and then make my injector settings while the engine is running?
I do need to get my fuel pressure checked to insure that I'm at exactly 3bar and that my 444/700 correction is appropriate. But if my Nismo FPR is set at something a little different, then wouldn't changing the injector correction percent eventually hit the right number? I tried everything from 58% to 68% with no luck or joy. And with the 444cc units, and injector settings at 100%/0.00ms, everything was blissfully smooth.
I'll try to run the self-learning idle cycle again, global ignition and injector changes had no effect. Any other ideas? Could something have been missed in reconnecting everything? As I said, the car was running absolutely, immaculately and fastidiously perfect up to the moment we shut off the car and swapped the injectors.
The 700cc units were meant to allow me to boost higher, but my car is now a hobbling cripple. And I must do something straightaway - there is no one, no one at all in this country who can professionally tune a PFC. I mapped my original map successfully on my own, I hope I can get my car running smoothly again....