Skip to main content

Introduction

The idle speed regulator is not a sensor but an actuator. It has several functions, including that of a starter. It is controlled by the engine computer.

This is a very well known problem on Bosch single-point injection TU engines. If your 106 has a rough idle or stalls when stopped, this regulator may be the cause.

  1. 
The idle speed regulator is located against the single-point injection block

the big pipe you see above the regulator is part of the car's LPG system; you won't have it on a classic 106 (this will make access to the regulator even better)
    • The idle speed regulator is located against the single-point injection block

    • the big pipe you see above the regulator is part of the car's LPG system; you won't have it on a classic 106 (this will make access to the regulator even better)

    • it is this black piece indicated by the arrow

  2. 
pull the ball joint to put it in the "accelerated" position and remove the end of the cable from its housing

remove the throttle cable completely

and put him aside
    • pull the ball joint to put it in the "accelerated" position and remove the end of the cable from its housing

    • remove the throttle cable completely

    • and put him aside

  3. 
disconnect the regulator by pressing the clip and pulling the plug

the clip is behind

just press it to release the hold
    • disconnect the regulator by pressing the clip and pulling the plug

    • the clip is behind

    • just press it to release the hold

  4. 
unscrew the 3 regulator fixing screws using a T25 torx key

A ratchet with a T25 torx socket can make things easier.

do not hesitate to use a magnet to retrieve the screws
    • unscrew the 3 regulator fixing screws using a T25 torx key

    • A ratchet with a T25 torx socket can make things easier.

    • do not hesitate to use a magnet to retrieve the screws

    • remove the regulator and the cable gland (it should normally come with it)

  5. 
compare parts

check that there are the same number of pins on the socket
    • compare parts

    • check that there are the same number of pins on the socket

  6. 
The cable gland is sandwiched between the injection block

and the regulator

you will have to align everything well to be able to screw
    • The cable gland is sandwiched between the injection block

    • and the regulator

    • you will have to align everything well to be able to screw

  7. 
screw in the 3 regulator screws

I use the T25 torx socket to go faster

but you can do this with a classic torx key
    • screw in the 3 regulator screws

    • I use the T25 torx socket to go faster

    • but you can do this with a classic torx key

  8. 
reconnect the plug, no need to press the clip (you should hear a "click")
    • reconnect the plug, no need to press the clip (you should hear a "click")

  9. 
Pass the throttle cable through the cable grommet

insert the end of the cable into its housing

and release
    • Pass the throttle cable through the cable grommet

    • insert the end of the cable into its housing

    • and release

  10. 
replace the canister hose if you removed it
    • replace the canister hose if you removed it

    • It is not necessary to pass the suitcase, the car should normally do its self-adaptions and the regulator should work.

Finish Line

a_bosc2000

Member since: 11/3/19

28,481 Reputation

147 Guides authored

2 Comments

I have two types of regulator, one with 4 pin connector and the other with 6 pin connector. can I bypass this?!!

ghaith - Resolved on Release Reply

Thank you, excellent tutorial

vincecoiff - Resolved on Release Reply

Add Comment



View Statistics:

Past 24 Hours: 11

Past 7 Days: 88

Past 30 Days: 418

All Time: 29,220