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Injector scaling

Practical Reflash Tuning

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Discussion and questions related to the course Practical Reflash Tuning

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Id1050x injectors im trying to scale on a subaru 32bit ecu. Set the cranking to 0.70 which is 30%. But the car still wont fire over? I followed the steps in injector scaling but still no luck? It will start on the factory cranking tables a,b,c,d,e,f. Also 0.70 in the throttle tip in enrichment. I have put the correct injector flow scaling and injector latency? This is not the first time its happen after changing injector data. Any help would be appreciated.

Cranking fuel on a subaru is a table of injector on times. Perhaps you're saying you are multiplying all values by 0.7 to subtract 30% from the on time when adjusting from stock to 1050x injectors? If so, that's still a bit too much fuel, but you're on the right track. 1050x flow 1065cc/min at 3 bar, almost exactly double stock.

Be sure to adjust all cranking tables. Other than that, it's just injector latency, low IPW data, fuel scalar, and the car will start on 1050x unless you have an issue unrelated to the different injectors.

For example MAF scaling doesn't get adjusted before you start the engine with new injectors, but still needs to be appropriate for the intake present, something like an air leak could be an issue, etc.

I was having a similar issue trying to scale 1050x id injectors. also dont see low IPW data pid on ecuflash or romraider. i can get her to start but its a long hard start, adding fuel in the cranking tables helps but it always wants more it seems, also when at idle if i rev the engine it wont go back down to 800rpm, it starts adding rpms to the idle every snap of the throttle till it reaches 2000rpm then starts drops to idle and keeps bouncing... also if i reinstall my accessport it starts, idles and revs normally? any insght would be greatly appreciated

ID1050x work very well with the ID provided data. Cars are generally within 3% fuel trim on base files, so if you enter all their Subaru specific 1050x data, for your base fuel pressure and are having issues after adjusting the other injector flow related tables such as cranking fuel, tip in, tip out, the car should run well unless there's a mechanical or electrical fault.

I use COBB's ATP software and haven't seen ECUflash in over a decade so I don't know what's available at this point, but COBB has the ability to input all the data ID provides. Hopefully you can find a low IPW comp table in your ROM.

Cranking fuel for those injectors on gas will be the stock values, reduced based on the change in flow vs. stock.

old/new=factor to multiply old by to get starting values for new injectors.

Again though, if there's a mechanical fault, like an air leak on a MAF tune, using correct values will not result in correct operation, so if you aren't having success by following the instruction in the reflash tuning course, Subaru worked example, then there's a good chance you're fighting something about the physical setup, rather than the tune itself.

thank you, so i have no issues when using access tuner software however my 08sti has had sec air and tgv delete since 2012 so now i cant save any new adjustments can only fiddle with realtime tables. does anyone know why my romraider log files wont load in megalog viewer it says log file contains no data or is not recognized. i can open in excel

I got hold of the correct injector data for ecuflash for id 1050x if you need help. I will need your rom file to make the changes. With megalog veiwer it should work. Convert it to a csv file if its in another file format.

ID data can be found on their website here at any time, in case anyone is looking for it:

https://help.injectordynamics.com/support/solutions/folders/263533

omg i just figured out my issue... im slow, so i have the old style cobb 4bar map sensor, and just ported over the calibration and did not notice the value in ecuflash was psia and calibration sheet had no value but was in bar.... once i converted to psi everything started to work properly... lol so happy now can't believe it took me so long to figure out my mistake... thank you guys for the help

Glad to hear it!

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