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Originally posted by CorbinI have the exact same problem. I am using two internal VB921 transistors to drive the stock coil (I think you are too). No matter what I do, I can not get the car to run right with any spark table. It will idle smoothly and I can get up to about 2500 RPM. After that, it just breaks apart. I have a connector that allows me to switch in between MS spark and stock ECU spark. I switch back to stock and the car runs perfectly. Today, I am going to get one of those 4G63 power transistors and see if that works. I'll post if I get it figured out. Corbin '95 ESI-T Now with more power and fewer leaks  Gimme fuel...Gimme fire...Gimme that which I desire
Sup corbin, exactly! I am using two internal VB921 to drive the stock coil. everything is good using Nate's spark table, but onces the RPM goes higher (usually bring the Deg of ignition advance to like 26-29degree, the car starts to bug and choke...
(the reason I say 26-29) coz with Nate's spark table, that's how the degree goes to once around 2500RPM with like 60 or 80kpa.
And also, I have extra connectors, so I can switch back and forth with stock ECU or MS. and with stock ECU controlling ignition, everything is FINE!
So what's up guys?
I hope I don't have to get external ignition setup? coz I thought internal VB921 is the best way to go??? damn it!~~~~~~~~Modification~~~~~~~~
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