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Posted

Hi all. 
 

looking for some insight/support on a issue I’m having with my plug-in jzx90 ECU

 

The tuner that done my car has informed me that these ecu have a issue with them , preventing the car to start once it it is hot and it will only start after 20 minutes or so once cooled a bit . 
 

 

has anyone else on this forum experienced this ? 
 

Posted

That's definitely a tuner issue --- the tuner should know how to set the cold-to-hot start enrichment tables... :P

Post a copy of your tune file, cold start log, and hot start log.

Posted

I will try and post them when I figure out how to 😂

Anyone else have some input into this ? 
 

id like to know if any other guys has the jzx90 plug in ecu and has this issue or not ? 
 

thanks 

Posted

I had some hot start issues for a while until I learned some different strategies to improve it.  Now my hot and cold and warm starts are all nice and crisp, on any ethanol% from E10 up through E85.

  • injector timing; spray at open intake valve for cold start, end injection before valve opening for hot start (like normal operation)
  • IAT correction for modeled fueling mode; set an enrich at high IATs for a timer after startup
  • pre-crank prime; play around with what it likes or doesn't like

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