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cold start problem

Posted: Wed Mar 29, 2023 5:17 am
by Lookout22
hey guys im having a cold start issue, this is a fully built h23a trying for first startup. i have used most of this map on the car last year on a stock motor.
i just modified it for a few things. here are a few details. full e85 , added coil pack retrofit from hondata (i am 100% sure im getting spark) plugs are factory gap after replacing them from .017 (no difference) ive messed with the fuel cranking ms and no change. here is a datalog and calibration. please help... oh and i smell fuel on the plugs too. temp in garage is around 45 degrees.

Re: cold start problem

Posted: Wed Mar 29, 2023 6:16 am
by TTR
What injectors, fuel pressure, map sensor? Usually have to decrease the post start rate of decay to get it to start and run for E85 under 50 degrees.

Re: cold start problem

Posted: Wed Mar 29, 2023 7:53 am
by Lookout22
2200 cc 50 psi
4 bar map

Re: cold start problem

Posted: Wed Mar 29, 2023 11:04 am
by TTR
injector size is set to 2470, make sure dead times are correct for 50 psi of fuel pressure. Make 20% changes in overall fuel trim until it starts. try giving it throttle while starting. If it needs throttle it's too rich.