406 Bosch diesel injection pump adjustment.

rayc · Unread post by **rayc** » 25 Feb 2006, 20:54

Hi guys
Can anyone assist me.

Ref my previous thread re knocking the tickover on the 406 (1.9 TD) is set at 11 rpm.

I have read the Haynes regarding slowing down the tickover but cannot assertain which screw is fast idle and which is normal idle.

I have adjusted the one I thought (Furthest away from cambelt) and the front one appears to be fast idle but to little effect.
It says in the book that the plunger should have a 1mm gap and I assume this to be when fully compressed and throttle closed. However on this setting sometimes it takes a while for the tickover to drop below 1500 rpm.
Also there is a cable to a vacuum bellow which links to a solenoid? attached to the braker servo.
Can anyone tell me if this bellow should be "in" or "out" when cold or hot?
I think this also needs sorting to get tickover right.
Can anyone also tell me correct tickover speed when hot and fast idle?

Thanks in advance for the info guys.

Once I've got this set up properly I can pass it over to my son who's still running around in his 405 GRDT

Thanks

Ray

Dave Burns · Unread post by **Dave Burns** » 25 Feb 2006, 22:43

When the engine reaches normal operating temperature the vacuum diaphragm pulls on the cable to lower the idle speed, don't go twiddeling untill you have got this working.

The electrovalve is energised at idle (providing coolant temperature is high enough) to allow vacuum into the diaphragm, at higher engine speeds the valve is switched off.

The valve is also switched off at idle if the aircon is switched on, this raises the idle speed to drive the compressor without risk of stalling the engine.

Test the electrovalve (usually blue) by connecting 12 volts to its terminals, either way round makes no difference, if it clicks its ok, leave it on for a minute or two and see if it still works, often they go open circuit only when warm.

If its ok check the piping to it and the EGR valve, both must be sound.

If the pump has got hydraulic dampers on the throttle lever, one like a small shocker on the front and one on top of about 1 1/4" diameter, they are best both got rid of, they serve no real useful purpose.

Dave

rayc · Unread post by **rayc** » 26 Feb 2006, 11:42

Thanks for that info Dave

Will go and have a look

The electroswitch looked black (May be dirty) Will have a clean up and sort out.

Will post results when I've had a good look

Cheers

Ray

rayc · Unread post by **rayc** » 04 Mar 2006, 15:00

It's the solenoid I think.
Took it off the car and ran two wires from the connectors to the battery and nothing!

So will see if a breaker of Peugeot have a new one in stock this week

Thanks for the info!

Dave Burns · Unread post by **Dave Burns** » 04 Mar 2006, 15:25

Have a look for one on a xantia too if you can't find a pug. they are easey to get off, they are on a bracket behind the LHM tank, the blue one is the one you want from a xantia if you have to.

Dave

rayc · Unread post by **rayc** » 04 Mar 2006, 21:05

Thanks Dave
There's a guy that breaks Citroens up near my mates workshop. Will go and see him Monday.

Appreciate you help mate. Will let you know the outcome

Take care

Ray

fastandfurryous · Unread post by **fastandfurryous** » 04 Mar 2006, 22:34

rayc wrote:my son who's still running around in his 405 GRDT

Is that a bad thing? in many ways the 405 is a superior car to the 406.

Is the 405 an estate by any chance?

rayc · Unread post by **rayc** » 05 Mar 2006, 07:34

No mate

The 405 has been brilliant for him. It's a GRDT Saloon in White.

Not let him down but the 406 came at the right price and he fancied it as an upgrade (it's got Aircon).

rayc · Unread post by **rayc** » 03 Apr 2006, 19:15

Update

all sorted.

Got new solenoid from Peugeot (Only £13). All now working fine.

Thanks for the info chaps!

French Car Forum

406 Bosch diesel injection pump adjustment.

406 Bosch diesel injection pump adjustment.

Re: 406 Bosch diesel injection pump adjustment.