1992 4cyl 4x4 pickup has no power under 3000 rpms. When driving it as soon as the engine hits 3000 to 3200 rpm it takes off. What is the problem - have tried all the obvious stuff... vacuum leaks, timing, plugs and wires.... Any ideas?
Have a look at the EGR valve if its stuck open you loos all the turbo boost till the EGR valve closes
it could also be the turbo gate valve (wast gate) sticking open so the turbo cant cut in till its screeming then the gate shuts and the old girl picks up her skirts and go's,,, you may get away with just blanking off the EGR valves to try them out but the turbo is a different mater,,,
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