6000+ rpm roughness

NoDOHC · 11-29-2010, 11:58 PM

If you are not injecting oil, you should be premixing.

You could have any number of problems, but you should verify that your VDI is operating correctly.

How new are your plugs and wires?

By rough, you mean that it is misfiring, or just shaking? It is possible that there is enough carbon buildup to make it out of balance (although I have never seen that). If it is misfiring, check the ground on the MAP sensor, the connection to the AFM, the TPS adjustment and linearity, plugs/wires and the VDI as previously mentioned. If it is not misfiring, you may have carbon buildup (which should be removed).

11-29-2010, 11:58 PM	#2
NoDOHC The quest for more torque Join Date: Sep 2008 Location: Sheboygan, Wisconsin Posts: 855 Rep Power: 17	If you are not injecting oil, you should be premixing. You could have any number of problems, but you should verify that your VDI is operating correctly. How new are your plugs and wires? By rough, you mean that it is misfiring, or just shaking? It is possible that there is enough carbon buildup to make it out of balance (although I have never seen that). If it is misfiring, check the ground on the MAP sensor, the connection to the AFM, the TPS adjustment and linearity, plugs/wires and the VDI as previously mentioned. If it is not misfiring, you may have carbon buildup (which should be removed). __________________ 1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers) 1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic)

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