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so ive been running ms3 pnp for 3 months and have had hot start issues from install of my ecu, my Intake Air Temp sensor is installed right after my intercooler away from heat. ive played with my after start enrichment settings but still no luck. after a few minutes or so my AFRs well richen up and runs fine. cold starts fine but just cant seem to figure out my hot start issues. any help or advice would be greatly appreciated!!
Last edited by mil_spec_miata; 12-21-2019 at 04:06 PM.
You may or may not be happy with exactly those. I posted so you would have a feel for the shape needed. To overcome heat soak of injector coils that results in lean hot restart, one must add ASE and ASE Taper time.
I usually use cycles and get it to hot restart OK before running out of adjustment (you can only go so high). So I’d start tuning in seconds so you have room for adjustment when you’re done.
I'm also running the FF640 inj and have hot start issues. What has helped the most has been increasing the ASE taper at higher temps. I noticed this on the DIY MSM base. Also increasing the EGO correction and reducing the activate temp.
so I made my settings close to David's settings and its made a deference. i've drove all over today with my lap top and kept making adjustment and its considerable better!! still need to do some work on it but its starting and idling ok now when hot, for sure on the right track. I really appreciate the input!!