popping and hopping

[chris frizzell]

hell fellow z fan just a quick quize for all you 280z owners . got the car out after is winter sleep but shes awoke in a bit of a mood . car ticks over fine but on giving her some gas she judgers as if no fuel then pick up and judger again . only change is i fitted a billet fuel rail but rev fine when not being driven . i think it may be a dirty connection in the amf ,throttle sencer and the ecu . but any thought from you good people . thanks chris

 

[Mark N]

Is it just when cold?
I'm assuming you don't have a feed to the cold start injector and the electrical plug is disconnected.
What is the base fuel pressure set at and is your FPR vacuum referenced?

 

[chris frizzell]

car is up to temp cold starter is connected and did a vac test and everthing is in the green . think it the throttle position box car has been stud for 6 months so corroded terminal . when driving ok upto 2k revs then pops and shakes then runs ok ans back to pop and shake but then you get up the rev range ie 50mph it runs ok . hope this help thanks chris