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Found 5 results

  1. Hello all! I've got a 1999 996 Carrera that hasn't had any mechanical issues outside of a water pump replacement earlier this year. Just today I noticed that when in 3rd to 5th gear (I haven't had it on freeways to see if it's in 6th too, but most likely it does) in the mid rpm ranges (2500 - 3000+) there is a vibration that I can feel through the gas pedal and throughout the car. When the gas is let up and/or when the vehicle is coasting the vibration goes away. The vibration seems to only occur on acceleration and does seem to be coming from the rear. The check engine light came on as well, at first it was flashing and is now constant. Any tips on what this could be? Drive shaft? Engine mount? Catalytic converter? .....?
  2. Hi guys! this is my first post! let's see if anyone can help me out with this problem. i have a 2004 porsche cayenne turbo with 120 000 miles. took it for a high speed run last night (130+ mph). when i got home i noticed a very rough idle and the car was shaking/vibrating. i can also hear a noise from the engine similar to an exhaust leak. the check engine light was already on prior to that ride (codes are : p2187, p2189, p0011, p0441) no new codes so i assume there is no missfires? feels like it runs on 7 cylinders.. coils and spark plugs have been replaced recently can a high speed run causes a blown spark plug/coil ? i still have boost so i assume it is not a boost/vaccum leak? can it be a stuck valve, bad spring valve all of a sudden? do i need a compression test or how can i check if one cylinder is missfiring? (i speak french sorry for grammar) thanks for your help! jp
  3. Experts, I just drove my MY 01 996 C2 27k miles odometer, from the airport, and it has a violent vibration at low speeds under 20mph and under 3k rpm. I don't have a CEL reader to post the codes When I was not on the gas the vibration went away, put as soon as gas pressed it came back. Pulling off and under 20 mph it felt like the something drastic was about to happen and the CEL was flashing. Btwn 3-4k rpm it was less violent vibration but still bad. I recently got it back from the shop and but it was only for oil change, and brake flush no engine work. The MAF sensor was already replaced last yr, maybe 4k miles on that. I searched the other threads and it could point to ignition coil pack. I drove it about 14 miles and tried to baby it as best I could. The dealer is about 20 miles away mostly highway, what are your thoughts on driving it to the dealer, or should I tow it. One post said u could damage the cats and there really expensive. Can someone give me guidance if it is ignition coil how big and costly a job that is? I know u don't have much to go on w/out the codes. Question - should I err on the side of caution? Thanls in advance for any guidance, and i'll update the outcome
  4. I recently purchased a 2004 Cayenne S with 60k miles and soon after getting it home I began to notice a vibration during coasting. Initially I thought it may have been a warped rotor, but soon began to notice that the brakes did not need to be applied to feel it. During acceleration no vibration, and steady state driving at any speed no problem, but when going down a hill or coming off the throttle, a very noticeable vibration that seems to be coming from the front end. I also notice that when in park and revving the engine there is a vibration as revs drop through the 1200-1000 rpm zone and then goes away at idle. Not sure if the two are connected. I have gone underneath and all the half shafts seem ok, and having heard about the infamous cardan joint issue, payed particular attention to the rear drive. I can move the shaft up and down in the carrier against the tension of the rubber, but there is no real slop and no clunking or banging when driving. The rubber appears to be intact. Not sure what the durometer of that rubber is or how much up and down movement should be possible by hand. Checked the front shaft (transfer case to front diff.) and that has no discernible sideways play, although there is some fore and aft movement of the entire shaft, maybe .25 inch or so, again, not sure what is normal. The only thing underneath that is visibly worn are the two bushings that support the exhaust right below the exhaust manifolds and what I'm guessing is some form of catalytic converter. Don't know if its possible that the engine exhaust is causing some form of harmonic vibration as the revs drop. I'm a mudboggin four wheeler from way back, and this vibration really says driveline to me, but am unfamiliar with this vehicle, so a bit lost at this point. New to the forum so any help much appreciated.
  5. I have a 2011 911S with a shifter that vibrates, trailing throttle in 6th between 2200 RPM and up, irratically, and only when well warmed up. The dealer readjusted the shift cables which cured it for about 800 miles. The car has 7000 miles since new. It will go away when I shift from 6th back to 5th and back to 6th. It also will buzz in 3rd under throttle. it can be felt but less noticably through the rest of the car as well. It seems that the stick shift takes the brunt of it. Thanks!
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