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I just bought a 1999 996 today 41,000 miles

XS623951-5sm.jpg

And it has a few minor thing done to it, and I have NO owners manual

1) the heater/AC fan doesnt seem to blow very hard, I am assuming its coing to need a need cabin filter, I found the DIY artical already

2) My interval wipper, i cant change the speed, the knob doesnt do anything.... I may need help on the diagnosis

3) I have sevral questions concerning the auto spoiler, Mine seems to have a one touch up, but I have to hold it down to get it to come all the way down, "Is that normal?"

Once I have the spoiler up and I reach 50mph or 70mph it will go back down, "Is this Normal?"

4)The engine light came on and I got 3 codes (p0420, p1124, p1126), I am hoping they all related to just one part

5)Are the 1999 fog and headlights HID or hylogen?

6)If I have aftermarket 18" wheels should I run the air pressure staggard (front to rear) like porsche does with their OEM 18's?

7) my dummy light for the "park" light doesnt come on when the brake is pulled though it comes on as soon as I start the car.

8) where the clock is, when I just turn the key to on (not running). What the small digital gauge?

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  • Admin

:welcome:

1. You can buy an owners manual for a MY 99 at Sunset Imports (Porsche Parts at Dealer Cost) for under $20.

The part number is WKD 996 110 99

2. Sometime the contacts get dirty from lack of use - try rotating back and forth a few times. If that doesn't help then check the relay under the dash.

3. I think that is normal - but someone without an Aerokit will have to answer.

4.

P0420 Catalytic Converter Conversion Too Low (Cylinders 1 - 3)

You may have a bad cat on that side.

P1124 Oxygen Sensing Adaptation Area 1 (Cylinders 1 - 3) - Rich Threshold

P1126 Oxygen Sensing Adaptation Area 1 (Cylinders 4 . 6) - Rich Threshold

This means that the DME can not make your mixture rich enough and it thinks it is too lean.

Start by cleaning the MAF and looking for intake air leaks.

5. Fogs are all Halogen. Main headlight are either halogen (standard) or Xenon (optional Litronics).

6. Yes, at least 4 pounds more in the rear than in the front.

7. Does it come on at all when you apply the parking brake.

8. I think you are asking about the oil level measurement at start up. It should be between the min and max bars.

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Thank you guy very much.

When I apply the parking brake, the light never comes on.... I am going to guess the swith for the parking brake is just stuck.

or more likely the bulb is burnt out in the cluster.
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Thank you guy very much.

When I apply the parking brake, the light never comes on.... I am going to guess the swith for the parking brake is just stuck.

or more likely the bulb is burnt out in the cluster.

The light comes on when I first turn the key on, I think it the 3rd one over from the left, it goes off when I start the car

07-12-08_1510-1.jpg

Also whats the 1st light on the left, its pointing the rear hatch, it stays on untill the car moves?

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OK, got the "PARK" light working, I pulled the cover off the side of the console, and the brown wire feeding the handbrake switch, looks like it was never put into the wire hold down and got rubbed in half by the hand brake over the years, I put it back together and into the hold down ........ WORKs now!!

Edited by superman_006
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OK... more questions after starting my car with the windows down in the garage. When I start my car I can hear the lifters for the 1st second or two. Is this pretty normal or should I change the oil to make sure I have to correct oil in it?

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What weight oil are you using? I noticed mine seems to do it a lot less after using the oil on the Porsche recommended list. I use Syntec 5w- 40 as per one on the Porsche recommendation list. Before I changed it I think there was 15W- 50 in it. I would get the lifter chatter for a few seconds and it would dissappear, just leaving it sit for a few hours. Going to the 5W-40, I hardly notice it anymore.

Edited by KevinMac
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Welcome Superman and good luck with your 1999 996. On your #2 question mine had one of the wires on the back of the switch fall off. The wires are a little short. I just put it back on and pinched the connector with needle nose pliers.

I have had mine since December and only had the dealer run the Porsche tester on it to verify cell codes and program a new key. My goal has been to not have the dealer do anything I can do myself. I hope you can get through those CEL codes without them.

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What weight oil are you using? I noticed mine seems to do it a lot less after using the oil on the Porsche recommended list. I use Syntec 5w- 40 as per one on the Porsche recommendation list. Before I changed it I think there was 15W- 50 in it. I would get the lifter chatter for a few seconds and it would dissappear, just leaving it sit for a few hours. Going to the 5W-40, I hardly notice it anymore.

I have no idea what weight of oil is in it, but the oil looks brand new on the stick.... I am going to call the dealer i got it from today and find out.

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Welcome Superman and good luck with your 1999 996. On your #2 question mine had one of the wires on the back of the switch fall off. The wires are a little short. I just put it back on and pinched the connector with needle nose pliers.

I have had mine since December and only had the dealer run the Porsche tester on it to verify cell codes and program a new key. My goal has been to not have the dealer do anything I can do myself. I hope you can get through those CEL codes without them.

Which switch the dash or the column?, I reset the CEL and put about 400 miles on it with no light, I am hoping its where the car was sitting for 8 months or so, It came on within 20 mins of driving

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Welcome Superman and good luck with your 1999 996. On your #2 question mine had one of the wires on the back of the switch fall off. The wires are a little short. I just put it back on and pinched the connector with needle nose pliers.

I have had mine since December and only had the dealer run the Porsche tester on it to verify cell codes and program a new key. My goal has been to not have the dealer do anything I can do myself. I hope you can get through those CEL codes without them.

Which switch the dash or the column?, I reset the CEL and put about 400 miles on it with no light, I am hoping its where the car was sitting for 8 months or so, It came on within 20 mins of driving

On mine the wiper speed control is a round knob on the dash by the radio. I just pulled the panel out and reconnected the wire. Great news on the CEL and hopefully by driving it more often the engine and sensors will adapt and get back to within spec.

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