MacAndrew_Jack
Well-known member
So I dove in with a bunch of air system upgrades to my TDI vanagon. It was working well before the upgrades, though I wanted the boost to be sustainable over 10k ft mountain passes and see lower IATs, so I plan to keep the same boost levels, but remove the boost valve from backing off the engine when I go over the passes, since I was at the limit for the old turbo.
Was:
1998 ALH, 11mm pump, 3 Bar map, .216 nozzles, Malone custom tune, stock VNT-15 turbo, cone-style air intake, stock pancake pipe on way to intercooler, stock intercooler
Now:
1998 ALH, 11mm pump, 3 Bar map, .216 nozzles, Malone custom tune (same as from before), tacotaco intercooler, donaldson airbox, new VNT-17 turbo, new 2 inch piping to intercooler (removed pancake pipe), replaced all vacuum hoses, new n75 valve
Verdict:
Everything works great, with nice boost, good airflow, lower EGTs, a bit more lag with the increased volume of intercooler piping, bigger intercooler, and bigger turbo. I live at 5500 feet of elevation, and the tune is set for that.
Problem:
in 4th gear, when I accelerate, I get a 1550 code and limp mode. This happened even more as I went to higher altitudes. Bummer!
Question:
Is this indicating that I really need Mark to update my tune (it is in the works) or might there be something else that I have not thought of?
Thanks in advance,
-macjack
Was:
1998 ALH, 11mm pump, 3 Bar map, .216 nozzles, Malone custom tune, stock VNT-15 turbo, cone-style air intake, stock pancake pipe on way to intercooler, stock intercooler
Now:
1998 ALH, 11mm pump, 3 Bar map, .216 nozzles, Malone custom tune (same as from before), tacotaco intercooler, donaldson airbox, new VNT-17 turbo, new 2 inch piping to intercooler (removed pancake pipe), replaced all vacuum hoses, new n75 valve
Verdict:
Everything works great, with nice boost, good airflow, lower EGTs, a bit more lag with the increased volume of intercooler piping, bigger intercooler, and bigger turbo. I live at 5500 feet of elevation, and the tune is set for that.
Problem:
in 4th gear, when I accelerate, I get a 1550 code and limp mode. This happened even more as I went to higher altitudes. Bummer!
Question:
Is this indicating that I really need Mark to update my tune (it is in the works) or might there be something else that I have not thought of?
Thanks in advance,
-macjack