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On the 993s. don't forget that some of these cars had pre mature valve guide wear and inherent problems with the emmission system. Have a dealer check the car out to make sure it is nothing more than the low battery scenario described.
Jim - I do not have that information but I am sure the dealer is well aware of the issue. I have a 97 cab that I purchased about 3 months ago. It is my 4th 911. I love them! And I have to say, there is nothing like the aircooled version. You made a great choice going with a 993! Ivan
Jim, You are in luck. There is a recall on this very problem and Porsche pays for it all, even though the car is a 1996. Just get the car to the dealer. You may want to call in advance. I just had mine done at the dealer in PA. Ivan
Did the charging system test show any drain? If not, then it is not the fan relay sticking - not to mention you can hear that fan run pretty easily. That would have shown up on the test. Take it back for another test to see if anything is pulling on the battery. If not, then either it is a bad new battery or the drain is something that kicks on and off intermittently - though not likely. If all checks out fine, buy a 50 dollar battery tender from the dealer and keep the car plugged into the wall. The other end simply plugs into the lighter on the car. It is simple, painless and inexpensive. I have one for all of my cars.
Could not agree more about rattles. Noise and the way it travels can be very confusing. You may think it is left door and at the end of the day it is right rear. Crazy but true. When I have rattles in any car, I start by removing everything non stock like sunglasses, cd cases, crap in the glove box etc! Then if the rattle is still present, I check things like seat belts and look for stuff under the seats, etc. If the rattle is still there, now it is time to take the door trim off if you are convinced that is the source. If you drive the car with the interior door panel off and the noise is much louder, your suspicion was correct. The plastic sheet you see with glue is the vapor barrier. It is ok to remove it, carefully - but make sure you put it back on with proper adhesive again. Otherwise, your car may develop leaks, especially during car washes and heavy sideway blowing rain storms. PS: I am guessing it is not inside the door, but time will tell!
Wow - this has been quite insightful. I have a 97 993 Cab that I just bought with 62K miles. It has experienced many of the problems listed: Before I purchased the car, it had a complete top end rebuild including valve guides and correction of the clogged secondary air injection system. The previous owner paid nearly $12 grand to have all this work done at Porsche! In April 06 the previous owner had all the convertible top motors and transmissions replaced at the dealer. My driver side door check is bad but at $700 to repair I will live with it. This is just a toy car, not a daily driver. I also have a 356SC which is fully restored and the apple of my eye! I just had the alternator replaced today (October 16, 2006) because the bearings were going bad so it whined a bit at 3000 RPM. The dealer said it was find but the noise annoyed me. I replaced the stone gaurd decals on the rear fenders because they were a bit beat up, made a huge difference. The car now looks showroom new. I replaced the windshield because the original one was getting pitted. The car really beats you up on semi rough roads probably due to the 18" wheels and the fact that it is not as rigid due to the cab top. My honda is much smoother, haha. I now wonder if the suspension is getting tattered as the original poster mentioned. The idle can be a bit rough intermittently but the dealer can not find a problem. It could be as simple as a bad reaction to ethanol or as expensive as a mass air flow sensor going bad. No computer codes yet though so the dealer suggested doing nothing.
I have an update on the engine "whine" that was occuring between 2900 and 3100 RPM. It was not a fan clutch at all! It was an alternator that was starting to go bad. I had the alternator replaced today and the car is noise free! I knew that noise did not belong there. The only thing left on this car is an intermittent rough idle. The car feels very similar to me at idle as my previous 87 and 89 carerras but the dealer said it felt a bit rough to them, then it straightens itself out. They checked all kinds of things like plugs, plug wires, distributor and even plugged it up to the computer for quite a spell and found nothing. They surmise it could be the mass air sensor but since the computer showed nothing they just cleaned it and said wait until it becomes more severe or trips a light on the dash, which they said may never happen. They said the rough idle could be some of the ethanol in the gas in the area as they have seen that before. I put some injector cleaner in the car and will try a different type of gas for the next tank and see what happens.
Richard: Thanks for the reply man! I have had a coupe of folks surmise that the noise in the dash was normal so that is cool. The other two noises are not serious but I was wondering if there was some sort of explanation. It will sort out soon. The car is just new to me. Ivan I wanted to let everyone know what I learned about the noises at the Porsche Dealer today, Holberts in Warrington, PA. 1) The noise in the dash is in fact normal. It is the small fan in the climate control panel that blows air over the sensor to let the car know what it should be doing to hold a steady passsenger compartment temperature. 2) The whine in the rear is the secondary air fan clutch kicking in. I took a drive in the car with Bobby Holbert who has been working on Porsches for an age and he said the noise is totally normal, not to worry. 3) The whistling wind noise, more of the same, can be seen as relatively normal. It is some system that runs for the first 10 or so minutes of the car's operation when cold to help burn off excess hydrocarbons. There you have it! Ivan
Richard: Thanks for the reply man! I have had a coupe of folks surmise that the noise in the dash was normal so that is cool. The other two noises are not serious but I was wondering if there was some sort of explanation. It will sort out soon. The car is just new to me. Ivan
I recently purchased a 1997 993 cab and am not sure about a couple of peculiar noises. Thoughts are welcome. 1) After I turn the car off, I can sometimes hear a buzzing or fan run in the dashboard for about 10 minutes near the a/c control panel. Is that normal? I thought it may have been a groaning clock, but that is not it. There is no smell present, like burning wires or anything. 2) When I leave a traffic light and shift through the gears, as I get into third and climb from about 42-47 mph, I can hear a mild whir from the rear end. The sound is faint at best and typically more audible if the convertible top is closed. If I modulate the gas, the noise dissapears. Once the noise goes away, I can stay in third and climb and decel in the 40 - 50 mph range and not be able to reproduce the noise again - that is until I stop at a light and start climbing through the gears again. Sometimes you can hear the noise in second gear for a second or two at about 3100 rpm. I thought it was tire roar (18" wheels) or noise from the tranny or engine but if that where the case, I would think you would always hear the noise at the speed that provokes the noise. I also suspected it was the spoiler deploying but it always happens below 45 MPH which is 5 MPH short of when the spoiler goes up. 3) When cold, the engine has a whistling noise. It sounds like wind whistling through the trees, most obvious when you shift from first to second. The noise goes away when the engine warms up a tad. I thought it was belt squeal, but the noise is much more like a wind noise. The car has the motor sound package if that helps. Finally, the car has 62K and the top end was fully rebuilt by Porsche 5K miles ago. The car runs like a clock, and though has these wierd noises, runs like a champ.