- Sep 21, 2009
I searched and searched for the last week and haven't found a problem that sounds like mine that has had a solution yet. This is my first post, I'm not new to turbo or import tuning, but this IS my first DSM, and the automatic transmission and AWD might be a bit much for me to tackle alone. My problem is that the car drives fine at highway speeds, downshifts hard from a 45mph roll and hauls ass when you punch it WOT. HOWEVER, it drags ass on the bottom end, the previous owner chalked it up to turbo lag since its a stock turbo and a huge front mount with an automatic. The best I can describe it, it its like accelerating with the Ebrake pulled, and then suddenly it takes off like a rocket about 30 or 40mph. From a roll it sometimes decides to shift into second gear right after you start moving, if I choose to shift it manually (L to 2 to D), it will still drag ass to get moving, sometimes, other times it takes off fine and shifts fine, even under part throttle, normal driving, it sometimes shifts at the normal shift points, or it will out of nowhere decide to shift into second at about 10 mph and then 3rd at about 20mph. Overdrive works perfectly fine, and I don't feel or see the tranny slipping at all, the engine doesn't rev up, it just drags ass to get up there, and I'm fully boosted the whole time, its literally like having the E brake pulled. Also I've noticed that when it DOES decide to drive normally (ish) under part throttle acceleration from a light or stop, I feel it surging a bit, almost like its pulling timing or like someone was pulling on the E brake softly, I'm familiar with that feeling from my other turbo car when the boost solonoid went bad it kept pulling boost and the car would kind of lunge under part throttle. I have no codes in either the ecu or tcu, just a steady short pulse, its pissing me off. I'm clueless to DSM cars as far as their quirks go, but any help would be greatly appreciated. We pulled the pan to change the leaky gasket when the new motor went in, as the stock motor had thrown a rod, and there is no metal at all in the transmission, fluid is clean and red, and flushed it anyways. I had never driven this car until the new motor went in, so I dont know if the blown motor had the same issues or not.