still repairing the
Join Date: Apr 2016
156 jtd slow acceleration(sometimes)
My 02' 156 1.9jtd has been acting weird these days, I have done about 600km so far and I have been experiencing this problem. This was after I installed a new stainless pipe from intercooler to Engine(my previous one was cracked, tons of boost leak), after installing the new pipe I got to feel much more powerful acceleration, but after driving a few kilometers the car becomes very slow, barely going uphill at second gear, sometimes I have to go into first gear to get it uphill, I don't feel the boost at all and the engine accelerates very slowly, but suddenly it becomes powerful again. It happens randomly, sometimes shutting off the engine and turning it on again can help bring back the power. I have disconnected the EGR it feels slightly better but even without the EGR it keeps loosing acceleration(EGR is clean and functioning properly). Also sometimes when the engine is struggling to accelerate, it suddenly pulls fast and the problem disappears ...
I have tried original good condition hose to make sure it is not the stainless pipe but still the same problem. Fuel filter is new and OEM, not a diesel problem but I am expecting it to be the Turbo, I have tried to move the VNT valve but it barely moves almost stuck, hooked up the car to a diagnostics tool everything is working fine.
Any idea ?
A JDM maniac under the seduction of Alfa Romeo.