Originally Posted by bjr_93tz

Other than one or two other things I'm a bit dubious about, could somebody please confirm that the hole in the throttle plate that supplies the sub needle valve on their DZ200 is drilled into the tapered metering slot as pictured? It just doesn't make sense to me to have it there when the taper profile controls the mixture progression as it uncovers an orifice in the throttle body wall.

On my 170cdi, the hole is drilled much further around into the "bulk" fuel slot which directs the metered fuel to the throttle body outlet, so the hole doesn't disrupt the taper profile.

DZ200cdi hole drilled into metering slot, radically changing the taper profile.

DZ170cdi, hole drilled into "bulk" fuel slot, no effect on taper profile.

Thanks in Advance
Brett