i have a 1993 300zx with a running problem have to keep hitting gas to keep it running changed maf fuel fiter even tps wont stay running and smoke out of back of motor :banghead:

Timing? Spark plugs? Connections tight and corrosion free? Vacuum leaks? Fuel pressure regulator/damper?

Timing? Spark plugs? Connections tight and corrosion free? Vacuum leaks? Fuel pressure regulator/damper?


I would like to add a bit more to that..

compression tested? All the hoses connected?


Yes it sounds stupid but I can make my Z run like trash by disconnecting 1 stupid 1/4" hose.