SnakeyesTx
10-07-2006, 11:03 AM
Hung out with Milkboot last night and we were out in his 95 525. He's been describing this awkward issue he's been having during the week and aside from his fan clutch being locked up causing a bit of drag, and his oxygen sensor in need of replacement, I couldn't visualize his description of issue until it happened first hand on the road.
At first it was noticable when going uphill or during moderate acceleration, but then we noticed it was happening off of red lights as well. At one point I swore it felt like we were either a NA-Diesel or as if we were towing something really heavy.
Basically coming off a light, the engine would sporadically just flatline on the acceleration curve. You could get to about 3500-4000 rpm but it would take a ridiculously long time to get there no matter where your foot was on the throttle. At one time it took about 40-45 seconds just to get up to 50mph and it wouldn't even get past 2000 rpm. Most of the time it would stay stuck in first gear and refuse to shift for a good 15 seconds or so. Then I began to notice sometimes the trans wouldn't go into 4th, or it would take a while to come out of 2nd. It was all pretty sporadic. Sometimes it would shift and accelerate just fine, sometimes not. Usually when not, we'd get over in the right lane since it would start to hold up traffic. The check engine light would come on and turn off occasionally as well. Tried shifting in S-mode, but I think that didn't do any good either, because sometimes it worked fine, sometimes it did the exact same thing as leaving it in "D".
Honestly, I've never encountered anything like that before. Pretty sure its an electrical issue since when we finally got to our location, we had disconnected the battery for about 20 minutes. Upon leaving, it acted in its strange way only the first 30 seconds or so, but then ran fine the rest of the night. Also if it matters at all, there's two crankcase hoses at the front of the head near the vanos part missing/disconnected. One was fairly large, about 1/2" in diameter, and the other nipple was slightly underneath it only about 1/8" around. The 1/2" line was so soft it fell off at the head, but the other end was laying around under the intake. The 1/8" line was nowhere to be found. I couldn't see where either line goes under the intake, and there is an oily residue all around the area of the motor where the nipples/hoses point making me think its just crankcase ventilation (but I could be wrong?).
Vehicle info : 95 525, Auto, 96k miles. Any ideas?
At first it was noticable when going uphill or during moderate acceleration, but then we noticed it was happening off of red lights as well. At one point I swore it felt like we were either a NA-Diesel or as if we were towing something really heavy.
Basically coming off a light, the engine would sporadically just flatline on the acceleration curve. You could get to about 3500-4000 rpm but it would take a ridiculously long time to get there no matter where your foot was on the throttle. At one time it took about 40-45 seconds just to get up to 50mph and it wouldn't even get past 2000 rpm. Most of the time it would stay stuck in first gear and refuse to shift for a good 15 seconds or so. Then I began to notice sometimes the trans wouldn't go into 4th, or it would take a while to come out of 2nd. It was all pretty sporadic. Sometimes it would shift and accelerate just fine, sometimes not. Usually when not, we'd get over in the right lane since it would start to hold up traffic. The check engine light would come on and turn off occasionally as well. Tried shifting in S-mode, but I think that didn't do any good either, because sometimes it worked fine, sometimes it did the exact same thing as leaving it in "D".
Honestly, I've never encountered anything like that before. Pretty sure its an electrical issue since when we finally got to our location, we had disconnected the battery for about 20 minutes. Upon leaving, it acted in its strange way only the first 30 seconds or so, but then ran fine the rest of the night. Also if it matters at all, there's two crankcase hoses at the front of the head near the vanos part missing/disconnected. One was fairly large, about 1/2" in diameter, and the other nipple was slightly underneath it only about 1/8" around. The 1/2" line was so soft it fell off at the head, but the other end was laying around under the intake. The 1/8" line was nowhere to be found. I couldn't see where either line goes under the intake, and there is an oily residue all around the area of the motor where the nipples/hoses point making me think its just crankcase ventilation (but I could be wrong?).
Vehicle info : 95 525, Auto, 96k miles. Any ideas?