Fiat Bravo Service Manual page 444

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Table of Contents

THROTTLE B O D Y

The throttle body meters the quantity of air drawn in by the engine (and consequently the power devel-

oped) according to the driver's request via the accelerator.

The throttle body is secured to the intake manifold b y four bolts: the butterfly is opened by means of link-

age where small butterfly opening angles correspond to the pedal being slightly pressed and large angles

correspond t o it being greatly depressed.

With the pedal completely released (engine decelerating or idling) the necessary additional air is supplied

by the engine idle adjustment actuator: under these circumstances, the throttle opening lever is in the end

of travel position against an anti-tamper screw w h i c h prevents the throttle from getting stuck in a closed

To prevent condensation and ice formation that c o u l d arise during certain exterior conditions, i.e. low

temperature and/or high humidity, the throttle body is heated by recycling a small amount of coolant from

the engine thermostat through a chamber inside the body.

The throttle valve position sensor and engine idle speed actuator are fitted to the throttle body.

In the pre-modification version, the engine idle actuator and throttle valve position sensor are bolted to the

throttle body. In the post-modification version, they are built into the throttle body.

1. Engine coolant delivery pipe attachment

2. Engine coolant return pipe attachment

3. Engine idle speed actuator bolted to the throttle b o d y (pre-modification solution)

4. Throttle valve position sensor bolted to the throttle b o d y (pre-modification solution)

5. Throttle valve

6. Throttle opening linkage

7. Throttle valve adjustment and antitamper screw ( d o not tamper w i t h )

8. Engine idle speed actuator built into the throttle b o d y (post-modification solution)

9. Throttle valve position sensor built into the throttle b o d y (post-modification sensor)

Bravo- Brava @

The anti- tamper screw is

adjusted by flushing

never be tampered with.

Print n° 506.670/27