Bosch K-Jetronic and KE-Jetronic mechanical fuel injection systems

Cold start valve - removal and refitting

~2min read
Note: Refer to the precautions at the end of Section 1 before proceeding. K-Jetronic system
Removal
1 Disconnect the battery earth lead.

2 Detach the electrical wiring multi-plug from the valve (see illustration).

9.2 Disconnecting the cold start valve wiring multi-plug
9.2 Disconnecting the cold start valve wiring multi-plug 3 Slowly unscrew and remove the fuel supply pipe banjo bolt. Take care on removal, as the system will be under pressure. Soak up fuel spillage with a cloth. 4 Unscrew and remove the two socket-head mounting bolts using an Allen key or Torx type key or socket bit on later models, and remove the valve. Refitting
5 Refitting is a reversal of the removal procedure. Do not overtighten the banjo bolt or the washers may fracture (use a new one each side of the union). 6 On completion restart the engine and check for signs of fuel leakage. KE-Jetronic system
Removal
7 Disconnect the battery earth lead.

8 Disconnect the wiring multi-plug from the valve which is located underneath the throttle housing (see illustration).

9.8 KE-Jetronic system cold start valve
9.8 KE-Jetronic system cold start valve location

A Fuel pipe union B Retaining bolts

9 Slowly unscrew and remove the fuel supply pipe banjo union. Take care on removal, as the system will be under pressure. Soak up fuel spillage with a cloth. 10 Unscrew and remove the two Torx type mounting bolts using a Torx key or socket bit. Remove the valve from under the throttle housing. Refitting
11 Refitting is a reversal of removal. Do not overtighten the banjo bolt or the washers may fracture (use a new one each side of the union).

12 On completion restart the engine and check for leaks.

Test yourself

A quick Ford Escort quiz: every answer comes with an explanation and a link to the manual page.