Thread: No Glow

Originally Posted by Blknight.aus

unless your in antarctica, (or my bedroom when the missus aint happy) the suzi should start without glowing within 4-5 turns of the crank at the most...

methinks something else is afoot.

Yep, mine are not even hooked up and starts first go every go unless the battery is flat, even in the snow.

Glow plugs draw a fair bit of current, a few amps each, so a crappy connection is enough to stop them working. As well as the resistance check mentioned above, if they are working a voltmeter across the battery will show a big voltage drop as they are switched on.

had a probem starting my'n for a while last year and this year!!! in cold whether

everyone automatically assumes glow plugs but you dont need them till it gets real cold in fact my mate never had his wired in and he was starting his car at 4:30 in the morning in france at -17....

at first we were convinced it was a bad earth cleaned up connections even brought a new earth strap ready to change......but

found out on my'n that the live battery wire had corrosion in it knew it had for a while as it was really stiff to move around but didn't really think anything of it..... changed that and the car has not missed a beat since starts first time everytime and sometimes in the morning starts so dam quick i haven't had chance to let the key go

also might be worth checking your battery condition make sure its got enough grunt to give it that umph it needs to kick over

My glow plugs have been disconnected.

I would check fuel. Bleed the injectors to see if fuel is flowing through the lift pump. It could be a blocked gauze filter at the inlet side of the lift pump.

Originally Posted by DRanged

From memory an Isuzu has to turn over at more than 200rpm for the pump to open for fuel to get to the injectors. I could be wrong though.

Justin

in the suzi its more to do with the cranking speed required to get the air hot enough to casue combustion the pumps are always working unless the rack has been pulled to the no fuel position. Soon as you release the rack from no fuel the govenor pulls it to the full fuel position for starting.

On some Cav type pumps one of the regulator valves for the pressureisation of the main pump body doesnt begin to function until a preset flow (and hence speed of the pump) has been achieved.

Originally Posted by Tank

I've worked on many trucks that from new have Aerostart starting kits, which comprise 2 cans of aerostart in a container mounted on the firewall with a dash button operated solenoid and two pipes connected to the air inlet, fitted by the factory, never seen any problems with them, Regards Frank.

Dead right. All turbo Cummins N series had an ether cold start system as standard equipment, and I challenge you to start a 2300rpm NTA crane carrier or fire appliance engine on a Melbourne winter morning without using it.

Originally Posted by mcrover

It is great to get you going in a desparate situation but it does damage the engine.

just curious why it might damage a motor?
I use it on the lawn mower very often I'm
too lazy to fix it

it doesnt always cause damage to engines but it has the potential to in some cases as the fuel is in the combustion chamber as the crank swings up on the compession stroke and as it intentionally has a lower flash point than dieso it will occasionally fire before TDC and try to run the engine backwards.

IF you keep pouring it in AND the engine fires on one cylinder from the normal Dieso process IF another cylinder takes a snort full of ether you can reach a point where 2 cylinders are trying to drive the crank in both directions at once. True the ether fueled cylinder wont be pushing as hard as the diesel fuel cylinder but it gets worse. When the ether fuel cylinder gets up to the point where injection occours its already got a flame front happenin so instead of the couple of degrees of delay before useful power is made from the diesel it happens as soon as its injected. Now the cylinder is seriously trying to push back down while the crank is doing the no, go up thing. So thats bad from the piston, rod and crank POV But with the sudden rise in combustion chamber pressure during injection if youve got the old type injectors that dont run at squillions of PSI (suzis, tdi 300/200 and the old 2.25 diesel) you can get blowback into the injector that wears the injector, making it dribble and not squirt properly which makes it harder for the diesel to ignite when your engines running slowly or trying to start when its cold.