Golf GTI L4-1781cc 1.8L SOHC (RD) (1987)
Fig. 6 Air cone
The corrected cone shown with broken lines, causes the sensor plate to float higher with the same air flow that it would in a simple cone at idle. This
raises the control plunger slightly and enriches the air/fuel mixture slightly, Fig. 6.
At part load the sensor plate and control plunger float lower than in a simple cone so that the air/fuel mixture is leaner.
Fig. 7 Backfire core