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Devilish · 5th April 2019, 19:26

Your Webasto has a PCB fault, glow plug/flame sensor fault, or dose pump fault. At full load the dose pump pulses 140PPM. and should pump 12ml+/m. Remove FBH fuse, unplug 2 pin plug and 6 pin plug. Inset a paper clip into pin 6 pin of the 6 pin plug, being careful not to misalign the pin receiver, with a wire attached long enough to reach the battery. Remove fuel line from FBH and insert into small receptacle. Tap the wire to battery 140 times at a rate of 2 taps per second, or 140 times in a minute, and measure the diesel delivered through the FBH fuel line, if ok.

You will need to have your PCB bench tested, if it starts ok, if still has start fault.

You Will need your glow plug bench tested, resistance test at 18- 30°C should read 0.2 to 0.3Ω blah blah, yeh right, took from a shelf at Webasto, ok as a guideline, they can work as high as 0.9Ω. If you are at this stage, FBH may as well have a de coke and new gasket, water pump impeller cleaned and a new O ring, and the burner mesh inspected.

Unfortunate it developed the fault so soon after you fitted it, sh and it happens

5th April 2019, 19:26	#4
Devilish This is my second home 75 Tourer Join Date: Apr 2009 Location: Cannock Posts: 4,133 Thanks: 3 Thanked 189 Times in 121 Posts	Your Webasto has a PCB fault, glow plug/flame sensor fault, or dose pump fault. At full load the dose pump pulses 140PPM. and should pump 12ml+/m. Remove FBH fuse, unplug 2 pin plug and 6 pin plug. Inset a paper clip into pin 6 pin of the 6 pin plug, being careful not to misalign the pin receiver, with a wire attached long enough to reach the battery. Remove fuel line from FBH and insert into small receptacle. Tap the wire to battery 140 times at a rate of 2 taps per second, or 140 times in a minute, and measure the diesel delivered through the FBH fuel line, if ok. You will need to have your PCB bench tested, if it starts ok, if still has start fault. You Will need your glow plug bench tested, resistance test at 18- 30°C should read 0.2 to 0.3Ω blah blah, yeh right, took from a shelf at Webasto, ok as a guideline, they can work as high as 0.9Ω. If you are at this stage, FBH may as well have a de coke and new gasket, water pump impeller cleaned and a new O ring, and the burner mesh inspected. Unfortunate it developed the fault so soon after you fitted it, sh and it happens __________________ If at first you don't succeed, hide the evidence Last edited by Devilish; 5th April 2019 at 19:36..