D24TIC - Mystery switch on injection pump

940TD · May 19th, 2012, 18:00

Hello,
My Volvo 940 has been suffering from cold start issues. Depressing this switch (to the right of the accelerator lever) on the injection pump seems to help it start, but what is its purpose, some kind of glow plug cut off switch?
I've never seen anything like it despite owning quite a few older diesels.

JohnL · May 20th, 2012, 15:28

It activates the EGR valve.
John

peter burton · May 20th, 2012, 18:28

I have blaked off my egr on my 940 years ago.Shoul this switch be disconected also and do you need to blank off little vacuum pipe or plug ends.

jpliddy · May 21st, 2012, 07:28

hi sorry to here your starting problem. i don't have a answer but these engines start first time every time unless its glow plugs or other issues .had mine 12 years the car has done 197000 miles . i swop all 6 glow plugs every 4 years it is easy to test glow plugs 1-4 if any are dead then change the lot
hope you get sorted great cars

May 19th, 2012, 18:00	#1
940TD Junior Member Last Online: Dec 19th, 2019 13:01 Join Date: May 2012 Location: Highlands	Mystery switch on injection pump Hello, My Volvo 940 has been suffering from cold start issues. Depressing this switch (to the right of the accelerator lever) on the injection pump seems to help it start, but what is its purpose, some kind of glow plug cut off switch? I've never seen anything like it despite owning quite a few older diesels.

May 20th, 2012, 18:28	#3
peter burton Senior Member Last Online: Yesterday 12:24 Join Date: Mar 2007 Location: norwich	should i disconect this I have blaked off my egr on my 940 years ago.Shoul this switch be disconected also and do you need to blank off little vacuum pipe or plug ends.

May 21st, 2012, 07:28	#4
jpliddy VOC Member Last Online: May 3rd, 2024 14:15 Join Date: Dec 2006 Location: stoke on trent	940 tdi auto 1995 hi sorry to here your starting problem. i don't have a answer but these engines start first time every time unless its glow plugs or other issues .had mine 12 years the car has done 197000 miles . i swop all 6 glow plugs every 4 years it is easy to test glow plugs 1-4 if any are dead then change the lot hope you get sorted great cars

May 20th, 2012, 15:28	#2
JohnL Senior Member Last Online: Apr 2nd, 2024 15:50 Join Date: Dec 2003 Location: Oise	It activates the EGR valve. John

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