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There aren't many people here casually cruising around in a Nissan Skyline GTR 33 Fred my man, much less adjusting the timing on one. You should get your hands on a repair manual.

Sounds like the Idle Air Control Valve and the Intake Manifold must be removed and cleaned. The vibration is worse when in gear than in neutral In gear there is a much greater load on the engine. Power is being transfered to the transmission and then to the wheels. This is going to cause the idle to drop a bit and this is where you'd feel the most ...

Based on your information, it appears your transmission is on it's way out. If your mounts were bad and the car was driven for a lengthy period of time, you were putting more stress on the tranny than usual. Being a FWD car with the tranny on the side, Horizontally opposed to the engine, it's verifiable when you say the car "shifts" when turning it off. This ...

If "injector cleaning" products helped but only lasted for one tank, I would try spraying Seafoam directly in at the throttle plate rather than putting an additive in your fuel. This should be a lot more effective at cleaning the injectors. If that doesn't help, my best guess would be that the vibration is from unequal power from one or more of the ...

The Megasquirt 3 is the way to go giving you total control of your new setup. The EFI Analytics software, Tuner Studio and Mega Log Viewer make tuning easy but has a feature set that is up to par with pro tuning setups. The VE Analyzer Live will also help dial in various areas of your tune as will the Mega Log Viewer Scatter Plots. I would bet your new ...