skinny19
Member
I have a 2006 jetta tdi std trans when I stop at a traffic light for a min or so and go to accelerate car has poor power and if I accelerate hard car will smoke black and the valves will ping. The car has a boost guage and it shows about 25 psi at about 1500 rpm while the engine is pinging and blowing black smoke. When the engine hits 2000rpm the car takes off with a burst of power, at this moment the boost pressure drops to 15 psi. The car seems to be worse when warm. The engine starts and idles perfect and runs excellent when running down the road, with lots of power as long as the rpm is above 2000. I bought this car used it has 176000km, I have records that show the head, and camshaft and lifters have been changed. The ASV and EGR valve have both been changed, CAT has been gutted, MAF looks clean, Vaccumn lines are not leaking, Fuel filter is new, air filter is new, wireing looks good can not see any problems. If I drive very easy and shift at low RPM and take it easy you would hardly notice anything is wrong, but you still notice the sudden burst of power. Engine light is off, I was wondering if it could be the MAF or out of time from when the head work was done. I unplugged the MAF and took it for a drive and it seemed a bit better but still not correct, and funny with the MAF unplugged the engine light still did not come on. please help i give up