Warning lights after LiquiMoly diesel purge. Help.

**dibar74** · 22nd March 2013, 19:31

Engine Z30dt.

I changed fuel filter and filled the housing with LiquiMoly diesel purge. The remaining went to an almost empty tank. So the car was running with "pure" diesel purge. Left the car idling, smoked a cigar, gave some revs, idling, revs, and everything was ok. Stopped the car.
After like hour went for drive to fill up (half a tank) and then this car with spanner light came on. Stopped the car and restarted and again the same light. Stopped and restarted, this time no spanner but exhaust warning light stayed lit.
I drove a bit, stopped the car and restarted. This time no lights. And car actually wanted to do regen so I gave her some

After this I stopped for coffee (half an hour) and went for drive again and the same thing happened again. Spanner few times and now exhaust warning light stays on.
I haven`t tried if the light goes away again, cause I`m not sure if the car is driveable right now.

So, should I worry? What`s going on? Or is it just "wrong" fuel right now? Would maybe a full tank of diesel dillute purge enough?

Thanks in advance!!!

**Celes** · 22nd March 2013, 22:40

I ran 0.5L of pure "purge" fluid and I didn't have any problems. The exhaust warning light indicates a fault on your exhaust system (from turbo, EGR-most likely, etc.) not your fuelling system.

**Leemarksmith** · 22nd March 2013, 23:21

Apart from the warnings did you notice any difference, I've got a can in the cupboard ready to do a direct purge into the fuel lines, just waiting for my fuel line pliers to turn up...

**myveccy** · 23rd March 2013, 03:18

Well without reading any stored fault codes, its going to be difficult to work out what your car might think is going wrong.

I used serveral different fuel system cleaners (attempting to cure a misfire) and either coincidence or cause, a glow plug burnt out, maybe due to the hotter burn. I will admit I only had the spanner/car error after this, which would either come on as soon as the ignition was turned on or some time after starting depending how warm the engine\weather was. Having replaced all glow-plugs the spanner has now gone. Only one was dead but it's such a hassel to replace them I decided to do all.

**big jon** · 23rd March 2013, 13:58

i was going to put some of this stuff in my 1.9 cdti est so i asked the guy who looks after the car to put it in before he did a full service this jan, he looked at me as if i was deranged and said the only thing you put in there is diesel,

**Leemarksmith** · 23rd March 2013, 15:07

As I still would need to buy an inline filter to do it the proper way and its a mess about I'm just going to do the filter and fire it in the tank... Exterior of my injectors are clean anyway as I gave them all a light sanding last weekend when I reseated them all lol