Ivan Posted February 11, 2007 Share Posted February 11, 2007 OK I took the 90 in to have the fuel pump tweeked and what a difference it's made. I know I could have done it myself with help from the articles in the tech archive but I just didn't trust myself not to mess it up completely. However I have another problem which has been going on for some while. When accelerating, as the revs pick up the engine starts missing and chucks out puffs of white smoke and the boost drop off (you can watch in on the boost gauge). The engine is not using oil or water so I don't suspect a head gasket. The timing was set by a proper LR mechanic (indendent specialist) last year when the timing belt was changed. The garage that did the tweeking (again an LR independant specialist) has indicated that the problem is caused by fueling and want to fit a reconditioned injection pump with all the expense that entails. Problem is I don't want to fit a new FIP and then find I still have the same problem. So before I commit to a recon FIP any suggestions from the forum ? I changed the fuel filter about 3 months ago and I'm prettty certain it's not letting in air as the car drives fine until I try and push the revs high. BTW this is a retro fitted 300 Tdi. TIA Ivan Quote Link to comment Share on other sites More sharing options...
JST Posted February 11, 2007 Share Posted February 11, 2007 i guess they recked the timing when the did the tweak? belt can stretch after been fitted. Quote Link to comment Share on other sites More sharing options...
western Posted February 11, 2007 Share Posted February 11, 2007 Get the injectors checked for correct atomising spray pattern & replace if needed & have the pump [FIP] tested for correct delivery pressures. Quote Link to comment Share on other sites More sharing options...
Guest diesel_jim Posted February 11, 2007 Share Posted February 11, 2007 one of my 300's started missing, it turned out to be weak valve springs, i could push about 4 of them down with just one hand! although mine never spat out white smoke, that does sound injector/FIP related Quote Link to comment Share on other sites More sharing options...
Andy Posted February 11, 2007 Share Posted February 11, 2007 white smoke is ubnburnt fuel as far as im aware. that plus the fluctuating boost indicates a fueling problem. i'd try several shots of injector cleaner & see if it improves before trying anything too expensive. also check your lift pump as low pressure delivery to the FIP can cause the injectors to play up - they wont open till the correct pressure is reached. Quote Link to comment Share on other sites More sharing options...
Ivan Posted February 12, 2007 Author Share Posted February 12, 2007 Thanks for the replies. I'll stick some injector cleaner down it and see if that helps. Lift pump is new fitted last year. Injectors were new about 20,000 miles ago. I'll check the valve springs as well and see if I can find someone to check the fuel pump. Cheers Ivan Quote Link to comment Share on other sites More sharing options...
TheRecklessEngineer Posted February 12, 2007 Share Posted February 12, 2007 300 Tdi problems, Seems to be missing Normally under the bonnet....have you tried there? Quote Link to comment Share on other sites More sharing options...
ciderman Posted February 12, 2007 Share Posted February 12, 2007 Normally under the bonnet....have you tried there? Beat me to it O witty one . Quote Link to comment Share on other sites More sharing options...
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