Thread: Rough Idle/misfire on start up

Have checked oil for signs of diesel but all clear so don't think it's a failed copper washer?

The diesel in oil is generally caused by the Oring at the top of the injector failing.

Generally if the copper washer at the bottom fails it causes compression to force air into the fuel rail in the head and cause no start or rough running.

So probably your injector washers are crook.
I have never seen my glow plug light on and doubt whether they activate anywhere in Oz , although it can get damn cold in SA.
Regards PhilipA

Do you get the misfiring when starting it while warm?
Could be fuel running back.

Ill see what happens when start it warm

Theres no diesel in the oil though at least

I've ordered glow plugs. Haha why does it have 4 for 5 cylinders?
But it's fine to start after that initial cold start, even if car isn't warm yet

I doubt it's glow plugs. Could be as I previously suggested. What check valves are in the fuel system?
Can the FPR allow air into the system?
Leonie, have you had any small leak from the right side, back of the engine?

Originally Posted by PhilipA

The diesel in oil is generally caused by the Oring at the top of the injector failing.

Generally if the copper washer at the bottom fails it causes compression to force air into the fuel rail in the head and cause no start or rough running.

So probably your injector washers are crook.
I have never seen my glow plug light on and doubt whether they activate anywhere in Oz , although it can get damn cold in SA.
Regards PhilipA

Yes, -5C once in the snow, I did not see the glow plug light. Maybe I missed it.

No fuel leaks had that leak in the other disco here before. Mine isn't though.
The old girl runs sweet after that first cold start. I have had a few weird starts before this rough 30 seconds or so that isn't battery or starter or anything. Can't explain it haha.

My glow plug light always comes on! It's been taking longer to go off recently. The glow plugs were not expensive though so is an easy thing which I'll feel happy its got fresh ones even if isn't the cause

Originally Posted by PhilipA

The diesel in oil is generally caused by the Oring at the top of the injector failing.

Generally if the copper washer at the bottom fails it causes compression to force air into the fuel rail in the head and cause no start or rough running.

So probably your injector washers are crook.
I have never seen my glow plug light on and doubt whether they activate anywhere in Oz , although it can get damn cold in SA.
Regards PhilipA

Check that the relay is still there and/or still working - my glow plug lamp illuminates for all starts where the coolant temperature is below 20degC. The glow plugs are vital in the engine starting strategy with the ECM controllIng pre heat and post heat time. I have a replacement set of NGKs to go in after I modify the disintegrating push-on connectors….