#5480, "Megasquirt RPM spike. Please HELP" Feb-22-12 09:57 AM by freakingbori617
Hello guys so Ive been trying to fix this issue for months I had posted in ms forums post, http://www.msextra.com/forums/viewtopic.php?f=4&t=43411&p=312602#p312602. And I have had no luck. Dave built my unit and checks out. I also sent it to symtech to verify I didnt cause any damage and they also added flyback decoupling mod. I made my harness from scratch and could not of came out any better. Please guys I need your help or im going to sell or part my car out.
#5482, "RE: Megasquirt RPM spike. Please HELP" In response to Reply # 1
Im checking at the moment that it isnt touching chasis ground.I took some rca wire double shielded and ran it to my cas, still no difference. Im starting to think it my have to do with my 65mm throttle body, I have around a inch of play on the pedal before its at wot maybe ae are off. IS there an explination why running seperate grounds on the bip373 may have an effect?
#5484, "RE: Megasquirt RPM spike. Please HELP" In response to Reply # 2
GUYS, I hope I found the problem. After much deliberating, I removed my 850cc low impedence injectors and put in my 190cc hi impedence injectors. I took it for a spin and instantly passed 3500rpm. I got it up to 4258rpm at that point my afr started leaning out and stumbled abit. Not sure if the size of the injectors, tuning, and spark, is the reason why. In the data logs I captured , from what I can see I had no spikes. So would just buying large hi impedence injectors be my best bet? Can someone look at my log and see what they think?
