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Matt
Matt, Mechanical Engineer
Category: Ford
Satisfied Customers: 23305
Experience:  BEng hons Mech engineering, in auto industry 22 years
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I was diving down the road doing 70 my van just stopped no

Customer Question

Hello I was diving down the road doing 70 my van just stopped no warning there was no lights on the dash and when the AA plugged it in there was no engine codes he did mention the DMF but I can’t see how that would stop the van from starting. I would be grateful for any suggestions thank you Daniel.
Assistant: Have you checked the fuses? The dashboard bulbs?
Customer: Yes all fine.
Assistant: What is the model of your '70 Ford?
Customer: No it’s a 11plate transit
Assistant: Are you fixing your vehicle yourself? What have you tried so far?
Customer: Iv has the fuel pump checked all the fuses battery we also had auto electrician out he can’t find any problems
Assistant: Anything else you want the mechanic to know before I connect you?
Customer: Would the DMF stop the van from starting
Submitted: 4 months ago.
Category: Ford
Expert:  Matt replied 4 months ago.

Hello Daniel and welcome to Just Answer

unless the DMF has completely choked up ( which doesn't happen suddenly) then it wouldn't stop the van from starting

I'd check that you're getting full power to the glow-plugs, they pull a lot of current so take care when checking but see if the relay is clicking when the ignition is turned on first and also check the fuse if this is OK check to see if the engine earth strap is also OK.

If the plugs haven't been changed in the last 20K then they may have to be replaced.
You can test the glow-plugs with a multimeter by measuring the resistance across the plug ( between the power connection and the body) it should be around 4-8ohms if its tending to infinity / open circuit the plug is faulty or by using a clip on current clamp, either on the supply wire to glow plugs or onto engine earth, with glow plug light on you should see 15-20amps for each glow plug fitted, 4 cylinders would be approximately 60-80amps.
Also if its not injecting at all then check the connections to the crankshaft sensor, unplug it and check for corroded contacts and broken wiring, and consider fitting a new sensor - do the same for the cam position sensor
If the EGR valve is stuck open then this too can effect starting so try disconnecting it to see if this helps or changes anything
Could also be an injector leaking fuel back through the overspill pipe, so not getting enough fuel pressure to tell ECU to fire the injectors, this is trickier to find and you’ll need the garage to do a ‘run back’ test to identify which one is the issue
you can also do a reasonable run-back test yourself by disconnecting the electrical plug on the injectors and the downstream pipe of the leak off, crank the engine over and if you see a noticable difference if the flow in the leak off then that the likely problem injector.
Lastly it’s also worth considering fitting a new fuel filter as if only slightly blocked this can lower fuel supply pressure and choke the main pump, the pump will be more sensitive to this when its cold as diesel thickens considerably with low temperatures.

Expert:  Matt replied 4 months ago.

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Thanks Matt

Expert:  Matt replied 4 months ago.

Hi
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Thanks Matt