I am not having any luck with getting my megasquirt to function properly over 3400 Rpms. I have the V3 board and I have tried runnign the opto circuit 2 different ways but I get Tach spikes over 3400 rpms and it makes the motor brake up. I tried the VR circuit but cannot get the motor to run. It will start and die. I tried adjusting the resistors alot but no help. I am running my crank sensor off the 5v supplied by the MS. like I said it runs like a clock under 3400 rpms. I am getting frustrated with this. Has anyone had success with this? I am complete standalone. No ecu at all. www.cnnmotorsports.com
#1693, "RE: Mega Squirt Problems 3.0" In response to Reply # 0
It's a 9v sensor. Try feeding it 12v, i've heard it will wotk off such feeds, otherwise, try building a 12v->9v supply for it.
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'95 Eclipse TurboGS (garage deco) '95 TSi AWD (restoring a survivor) '97 Talon ESi-T (poor impulse control) '99 Eclipse RS-T (daily beater) '13 Evo X (mostly stock) '17 Sienna (Middle Aged Dad Mobile)
#1694, "RE: Mega Squirt Problems 3.0" In response to Reply # 1
Yeah that was next on my list... It does work wiht 12 volts. I also heard it works wiht 5volts . Thanks Dino. I have a regulator for the 9 volts too so I will probably just build that to prevent any problems. www.cnnmotorsports.com
#1698, "RE: Mega Squirt Problems 3.0" In response to Reply # 2
Works, sure... But i imagine the current draw increases with RPM, and that may be why its breaking up at ~3500RPM, it can't get enough current out of the MS's 5v supply.
______________________________ If a sentence found online has 35% misspellings or greater and includes at least two racially charged expletives, chances are it is a YouTube comment.
'95 Eclipse TurboGS (garage deco) '95 TSi AWD (restoring a survivor) '97 Talon ESi-T (poor impulse control) '99 Eclipse RS-T (daily beater) '13 Evo X (mostly stock) '17 Sienna (Middle Aged Dad Mobile)
#1704, "RE: Mega Squirt Problems 3.0" In response to Reply # 3
ok Well I hooked up a national semi conductor LM7808CT into the mix and it is better but now it will break up around 4800 rpms free reving. I also get the tach spike like before. Dino what input are you runnign on your board? NER was having a similar problem with the opto but no the VR. I simply cannot get my car to start on the VR circuit. www.cnnmotorsports.com
