Maybe its because its now got 254K miles, or perhaps I've not had the radio on as loud, but my TDI has gotten more noticeablity tappy recently and its power seems a bit lacklustre.
It isn't consuming oil,water or smokey. It isn't running hot. I can't say I've noticed a huge drop in fuel economy. I never rev the bollox off it. It occasionally might touch 90mph (3000rpm) but usually does 70ish It just feels like its perhaps lost 20BHP and gained 10dBA somewhere along the line. It doesn't run unstable & idles quite easily @ 900rpm Are there any plausable reasons which could explain a power drop , other than just old age.
- As part of the service, I changed the air & fuel filters. It was a pain to bleed the air out of the fuel line but it did finally start. I've noticed there still is air bubbles in the fuel pipes. Could this be effecting the pump & combustion swirl ?
- My 1.9TD synergie feels more sprightly even though it only got 2 more BHP it weighs ½ton more. I can feel & hear the turbo quick in on my Pug/Cit diesel. I don't notice such an effect on my Audi 80. Could I have a leak or a blockage somewhere from my turbo/intercooler which might loose power & induce more noise ?
- Would a diagnostic check at a diesel tuning specialist be worthwhile. How do you compression test a TDI ?
Its got me to thinking its time to get rid of it, but I do have a conscience and even though its about to just get a fresh MOT, I don't want to knowingly sell someone a car that might have a terminal engine problem.