Evening all.
Brain picking moment I'm afraid. I have a 2.5Di, converted to turbo from a 2.5TDi, but using the original 2.5Di Block, Pump, Banana Inlet etc.
I had the pump rebuilt and new injectors when I rebuilt the engine about 20k miles ago. It was still N/A then, so was running New Red Spot injectors and the 686-3 pump.
Last year it got turbo'd, but I kept the same injectors and pump after doing the mods on max fuel and Torque Sleeve. I appreciate it's recommended to go to Brown Spot Injectors, but as they weren't very old, I decided to get some more miles out of them.
Anyway, this year, I have intercooled it as well, and a net result of that was that it simply runs out of power at just over 70mph (it would do more pre-intercooler) so I came to the (hopefully logical) conclusion that the injectors simply couldn't get enough fuel in at higher RPM now the air was more dense.
Hence, I bought a set of 100PS Injectors and have fitted them today... After a bit of messing about with max fuel and Torque sleeve again, I've got pretty much the same performance as I had before, only I have considerably more smoke at tickover than I ever had before - in fact it NEVER smoked with the Red Spot injectors in.
I've played about with Max Fuel again, and checked the pin was still in the Torque Sleeve - nothing seems to make any difference at tickover. When it gets a few revs on, the smoke isn't as bad other than when it's properly booted, and even then it just leaves a puff on the road, so I don't think I'm far away with the settings... other than this excessive tickover smoke.
I'm concerned it won't pass an MOT like it, as there's too much, but I can't seem to dial it out. I almost swapped them back again earlier, but managed to convince myself to leave it for a bit!
Does anyone have any experience of this, or can suggest something I've overlooked in a big way?!
Cheers all - looking forward to hearing from you.
Happy Saturday.
Ben