Jamie1969

Hi There. I am having the exact same problem. Brief history below 1.) At 20,000km it was park up for 2 weeks. First time it start I knew it sounded different. 2.) Took it to Toyota in Welshpool WA. Said it was normal. But I knew it was not there before 3.) At 25k Km I took it back and said please investigate. They had it over night and put it on the diagnostic machine to test injector tolerances whilst cold and hot. FYI Toyota have a range of -3 to 3 as acceptable. Mine were all at zero. 4.) At 30k km i basically cant stand the car it irritates me so much. I took it to Toyota in Northbridge and the head technician came for a drive. He said he could hear it on the left hand bank. FINALLY! 5.) What they are doing today is disconnecting each cyclinder until the noise goes away. If it does then its a dodgy injector. If it doesnt then its a valve clearance issue which Toyota has said is most unlikely A few things. On the V8 Diesel, the injectors are a nine hole design. Each hole is water bored they are that small. Basically if one hole gets blocked then its a domino effect on the rest of the injector. Ultimately the performance of my car hasn't change at all. Its just the tap tap sound at 1,500rpm at 50km/hour that increases with revs until the road noise takes over. Will update once theres a result. JM