98 vts chugging and pore idle

[clintham69]

i got a 98 vts, the only engine mod is an uorated backbox, now it is over fueling cause its poping through the exhaust when u lift off the throttle, on tick over when the choke goes off it starts chugging and if left it will stall, any idea

[makaveli144]

Could be something as simple as a very dirty air filter restricting flow and making it want to stall, could also be map sensor/lambda sensor.

[clintham69]

got a new standard air filter

[RCD-Performance]

lambda sensor.

[onzakieron]

Aye,

Lambda Sensor
Air inlet valve (the name leaves me at this moment) IDLE CONTROL VALVE!
Clean all valves/plugs in that area

I had a similar problem, which got progressivly worse, turned out to be this valve had oil in, try pulling it out and cleaning with tissue.

[onzakieron]

Ignore that, I misread, thinking you had a VTR.

[clintham69]

apparently it had a new lamber sensor 6 months ago butim not sure now, anything else anyone can think of

[lavo-vts]

this is a very common problem with no definate answer. just try all sensors as said