Misfire again.

Bongo and Tonic · Post by **Bongo and Tonic** » Thu Dec 07, 2006 2:08 pm

My bongo misfires, but only when started from cold. Also there is a lot of smoke at this time as well.

I first suspected the glow plugs, but I have had them out and tested them and all seems fine. All plugs look new, are clean, and glow when activated.

Anybody have any other ideas what this could be?

mick · Post by **mick** » Thu Dec 07, 2006 11:50 pm

If the plugs seem OK, then you need to check the relay and the fuse (the 'fuse' is actually a short piece of wire from the battery terminal) The relay is behind the battery.

A simple check is to :-

Lift up the drivers seat.
Connect a voltmeter (or 12 v lamp) up to the glowplug bus bar and earth
Switch on the ignition
The voltmeter should read 12v, or light up the lamp.
It will then go on and off intermittently as the relay switches on and off - and eventually off.

If you get nothing, it is the relay, the fuse, or the wiring from the relay to the bus bar(very unlikely)

Bongo and Tonic · Post by **Bongo and Tonic** » Fri Dec 08, 2006 11:14 am

I tested the glow plugs by connecting them (in turn) to the bus bar so it's getting 12v OK.

mick · Post by **mick** » Fri Dec 08, 2006 12:30 pm

The glowplugs may be failing under pressure ?

Bongo and Tonic · Post by **Bongo and Tonic** » Sun Dec 10, 2006 11:15 am

Any idea how to check this?

MAD DOG MURRAY · Post by **MAD DOG MURRAY** » Sun Dec 10, 2006 11:40 pm

my beast had this problem and i did all the same tests as you have done and all was ok.but i had lost a tiny drop off water now the dog is dead head gasket went at 80mph pumped all water out the exhaust and of course over heated. but the beast will rise again.