PradoTDI
Veteran Member
Hi all,
New to tuning TDI's, I'm more used to old, mechanical Toyota diesels. A little background to my problems: I have a Toyota LandCruiser Prado with an ALH swap, initially I ran it with stock injectors, a GT1749VA from a BHW and a Malone Stage 1 tune. It ran 10-15psi, 850-950ºF pre-turbo EGT's at 65-70mph on flat ground, and would just touch 1250ºF at 18-20psi if I accelerated hard in 4th and 5th gear.
A couple of weeks ago I got 150P1019 nozzles installed and pressure tested by a reputable diesel injection shop, put in a 3 Bar MAP sensor and loaded a Malone Stage 4 tune. Now I can't get it to stay under 1200-1250ºF at 65-70mph on flat ground, and the slightest hill puts me up over 1400º. Boost will spike up to 23-25psi after each shift, then quickly drop back to 10-15psi, and only a significant amount of throttle will get it up to 18psi. There is a constant stream of black smoke out the exhaust at all times, and it pretty much rolls coal when accelerating.
I have adjusted the IQ to around 6.5mg/str with the hammer mod, and made sure injection timing is correct. IQ deviation range is -0.44mg/str to 0.99mg/str. I checked the turbo actuator with a vacuum gauge and it is within spec, but I don't know if the stop is in the correct place since I had to disassemble the whole turbo during the course of the swap. The N75 is brand new.
I feel like the engine has too much fuel and not enough boost. Power is great, but temps get out of hand so quickly that I don't feel like I can use it. Beforehand I could pull mountain passes in 4th without getting over 1100ºF, now in the same conditions I am pushing 1500ºF. What should I look for? Any useful parameters to log with a VCDS that would help get a better picture of what's going on?
Thanks in advance for your input!
New to tuning TDI's, I'm more used to old, mechanical Toyota diesels. A little background to my problems: I have a Toyota LandCruiser Prado with an ALH swap, initially I ran it with stock injectors, a GT1749VA from a BHW and a Malone Stage 1 tune. It ran 10-15psi, 850-950ºF pre-turbo EGT's at 65-70mph on flat ground, and would just touch 1250ºF at 18-20psi if I accelerated hard in 4th and 5th gear.
A couple of weeks ago I got 150P1019 nozzles installed and pressure tested by a reputable diesel injection shop, put in a 3 Bar MAP sensor and loaded a Malone Stage 4 tune. Now I can't get it to stay under 1200-1250ºF at 65-70mph on flat ground, and the slightest hill puts me up over 1400º. Boost will spike up to 23-25psi after each shift, then quickly drop back to 10-15psi, and only a significant amount of throttle will get it up to 18psi. There is a constant stream of black smoke out the exhaust at all times, and it pretty much rolls coal when accelerating.
I have adjusted the IQ to around 6.5mg/str with the hammer mod, and made sure injection timing is correct. IQ deviation range is -0.44mg/str to 0.99mg/str. I checked the turbo actuator with a vacuum gauge and it is within spec, but I don't know if the stop is in the correct place since I had to disassemble the whole turbo during the course of the swap. The N75 is brand new.
I feel like the engine has too much fuel and not enough boost. Power is great, but temps get out of hand so quickly that I don't feel like I can use it. Beforehand I could pull mountain passes in 4th without getting over 1100ºF, now in the same conditions I am pushing 1500ºF. What should I look for? Any useful parameters to log with a VCDS that would help get a better picture of what's going on?
Thanks in advance for your input!