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Post by gianmarco on Sept 8, 2013 10:21:32 GMT
Good morning,
I have a problem with Daf 44:
The moment when stopped, in gear, the engine tends to stall accelerometers. Not to turn it off I have to fiddle with the accelerator pedal. All this happens when the engine is at normal operating temperature.
In normal driving the engine works fine. It also keeps the minimum and always starts on the first try.
What could it be?
Thank you very much
Gianmarco
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Post by pauldaf44 on Sept 8, 2013 10:33:13 GMT
Good morning, I have a problem with Daf 44: The moment when stopped, in gear, the engine tends to stall accelerometers. Not to turn it off I have to fiddle with the accelerator pedal. All this happens when the engine is at normal operating temperature. In normal driving the engine works fine. It also keeps the minimum and always starts on the first try. What could it be? Thank you very much Gianmarco Stalling at junctions is quite common with DAFs and could be caused by a number of things. First check that the anti run on valve is properly screwed into the side of the carb as they can work loose, then check that it gets a supply voltage when the ignition is on and that it is actually working. Other than that its most likely going to be down to ignition timing. Set your points gap and set the timing statically and it may well solve the problem. Don't be tempted to wind the idle speed up to stop it from stalling as the clutch will start dragging making gear changes impossible. If that doesn't work what colour are your spark plugs?
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Post by macplaxton on Sept 8, 2013 13:12:58 GMT
Car should be started either in Forwards or Reverse, with hand brake on and foot brake on. Normal driving = ok. Idle / minimum = ok. Starts no problem = ok. Do this test: Start the car then apply the footbrake. Engine speed should stay the same or rise a little. The same should happen if the "low-ratio hold" switch is on. low ratio switch.jpg by macplaxton, on Flickr If it stalls then the mixture is too weak.*** If it speeds up a lot, then the mixture is too rich. ***check all vacuum pipes for leaks. These pipes should be present (but should be ok without in a warm climate): hotspotpipes1 by macplaxton, on Flickr This solenoid should work: pilotjetelectro by macplaxton, on Flickr
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Post by 33grinder on Sept 8, 2013 13:17:42 GMT
To test that the solenoid works, switch the ignition on then remove the wire connecting to it. As you make the connection again you should hear the solenoid click.
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Post by gianmarco on Sept 8, 2013 13:43:53 GMT
Really, thanks for the replies.
The solenoid is ok, it works correctly.
I did not understand why I should carry out the tests with the brake button. How do I know if it works correctly?
I made a video for you. At a time when the engine shuts off is because I accelerated. The second trend set in motion is better because when I turned the key gained speed.
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Post by gianmarco on Sept 8, 2013 13:48:58 GMT
What do you mean as a vacuum?
In the engine compartment is an electric vacuum pump from which come out of the pipes that end in a depressor placed next to the carburetor. And this the vacuum system? What is it? It 's the first time I see him in a car.
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Post by pauldaf44 on Sept 8, 2013 14:05:01 GMT
What do you mean as a vacuum? In the engine compartment is an electric vacuum pump from which come out of the pipes that end in a depressor placed next to the carburetor. And this the vacuum system? What is it? It 's the first time I see him in a car. The variomatic is controlled partially by engine vacuum. The electric valve in the engine bay controls were the vacuum acts in the vario. when you press the foot brake the engine revs should rise slightly, the same should happen when the low hold button is pressed. If there is a leak anywhere in the vacuum system the fuel mixture will be affected giving rise to running issues. As such when tuning disconect the pipe from the back of the inlet manifold and plug it. But don't go anywhere near that mixture screw until you know that the ignition circuit is right.
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Post by pauldaf44 on Sept 8, 2013 14:09:11 GMT
From your video it sounds like your ignition timing is out.
Also your video says cold start did it need choke to start I didn't see you pull the choke knob.
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Post by macplaxton on Sept 8, 2013 14:21:11 GMT
And this the vacuum system? What is it? It 's the first time I see him in a car. The Variomatic transmission is controlled by two factors. a) Centrifugal weights in the primary units. b) Manifold vacuum either working with the weights or against (overdrive / kickdown) The manifold vacuum is directed by two components. a) the mechanical valve attached to the carburettor DAF44_DAF55_service_bulletin_E3-007 by macplaxton, on Flickr b) the electric solenoid EMV1 by macplaxton, on Flickr 44_46_manual_3_17_18 by macplaxton, on Flickr
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Post by gianmarco on Sept 8, 2013 15:08:05 GMT
From your video it sounds like your ignition timing is out. Also your video says cold start did it need choke to start I didn't see you pull the choke knob. I apologize for the mistake of writing: the engine was warm, not cold!
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