AAZ hot starting problem

[morganite]

AAZ engine, just rebuilt the engine, rebuilt injector pump,injectors, glow plugs,fuel line with non-return valve,Starts first turn when cold, when warm its reluctant to start, could i alter the glow plug wiring to have the glow plugs come on even when it’s warm? or any other idea,s to overcome the reluctant starting when warm.Thanks in advance for any idea,s

[davidoft1]

Check the heater plug temp sensor is operating correctly

[morganite]

Thanks for the reply, would the heater plug sensor still operate when the engine is hot and the glow plug light is,nt showing on the dash?

[colinthefox]

Put a 600 ohm resistor in series with the glow plug temperature sender. This should give about 4 seconds glow with a hot engine, and a bit longer glow at lower temps, depending of course on exactly which sender you have fitted. Trial and error....more ohms gets you longer glow.

[morganite]

Still got hot starting problems, can anyone tell me what these sensors do on my AAZ ? sensor with brown& yellow/red trace wire, in plastic black housing. Brown &blue/white trace wire, in black plastic housing. Brown &Brown/red trace wire at the back of Cylinder head, Should i have 3 coolant sensors? which one would be the Coolant sensor that might be causing my hot starting problems? Many thanks for any advice.

[mioba]

BW site has a great write up on these sensors and their function in the tech section.

Either you have a faulty sensor - easily tested by reading the BW site. Or dodgy wiring from sensor. Did you put the sensors in their correct location.

You are handy with a multimeter - essential tool for these vans.

At this age. The sensor connection do fall of the wire due to age and corrosion.

Are you sure its an electrical fault and not a leak