[KGken]

I have a Diesel Freelander 1 which I use on our smallholding. I had the injector tips cleaned and after refitting there was a loss of power and lots of white smoke on any strain on the engine accompanied by pinking. I think I sussed it insomuch as I think I had placed the yokes that hold the injectors in the wrong way up. I changed that and although there was still moderate smoke it ran much better and had enough power to get about ok. Then I put petrol in by mistake and hoped by diluting it with more diesel it would be ok... but not! I drained the tank and put in fresh diesel but still no power and copious amounts of white smoke. I took out the injectors yesterday, cleaned everyting up and replaced them. I noted that some of the securing bolts were not that tight and hoped that may have been the issue. One of the cylinders seemed to have a noticable amount of raw diesel apparent as I removed the injector suggesting that it was wasn't firing?
On starting the idle was reasonably stable but under any strain it emits a lot of white smoke and there is very little power suggesting a lot of unburnt fuel. It pinks under strain. It will hardly climb a slight incline
Any ideas? Or this one for the scrappy? It's a shame as it's in pretty good shape otherwise. Thanks for any help

 

[Nodge68]

Sounds like there is a lack of compression under load. Did you make sure the injector seats were cleaned thoroughly, and new copper sealing washers were fitted? If an injector doesn't seal tight, the compression is lost the moment the cylinder fires, which then just blows the remaining unburnt fuel out the exhaust. Oh, and cleaning the injector tips isn't necessary, as any dirt that causes problems is on the inside, not the outside. Petrol in a diesel injection system will cause issues if the concentration is high, but if it's only minor, generally you'll get away with it, and often notice a performance increase, as the fuel system is cleared of residue build up.

 

[KGken]

Sounds like there is a lack of compression under load. Did you make sure the injector seats were cleaned thoroughly, and new copper sealing washers were fitted? If an injector doesn't seal tight, the compression is lost the moment the cylinder fires, which then just blows the remaining unburnt fuel out the exhaust. Oh, and cleaning the injector tips isn't necessary, as any dirt that causes problems is on the inside, not the outside. Petrol in a diesel injection system will cause issues if the concentration is high, but if it's only minor, generally you'll get away with it, and often notice a performance increase, as the fuel system is cleared of residue build up.

Thanks Nodge, I was really particular about making sure the injector seats were clean and new copper washers and O rings fitted. Intuatively it all comes back to the injectors and it feels like there's a loss of compression and hence the unburnt fuel. The injectors were really coked up and so I had the tips cleaned sonically. It was running rough and advised it wouldn't pass emmisions tests... I should probably left well alone but I had planned to use it on the road. I wonder is there anything I should have done on replacing the injectors other than new washers and O rings and then bolting them down? The orintation of the yokes was confusing but I think they are the right way up?

 

[hd3]

I was really particular about making sure the injector seats were clean

did you re-seat them .. by chance ?

.