Richard Hamilton

If these engines are broken in well, they can get to the point where they use no oil at all.  I went from a quart every 5K miles to no oil between 15K mile changes.  Mine is a C2 with 40K miles on the clock.

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15000 miles is a long time between changes. UK service schedule is an oil change at 12000 mile intervals, but I change mine at 6000. I have never added any oil between changes, and the car has done 64000 now. I use 5W-40.

Hi Jim

I had a creaking sound from this area which I tracked down to the sunroof mounting point, directly above the seat belt slider. The torx bolt had loosened off, causing movement between the frame and roof.

See also:

http://ws.porsche.com/cayman/pcgb.asp?

Try this:

http://ws.porsche.com/cayman/pcgb.asp?

Personally, I think it looks great.

There are a lot of TSB's about dashboard noises - I would have thought that was the best place to start.

Jim

I got this when I did the OBC retrofit. Turns out I had inadvertantly pulled the plug from the back of the interval control. The lead on mine was a bit short, and it was a fiddle to get it back on with the plug in place. Might be worth checking.

I didn't even know that one could source a black bonnet badge? Where?

Sorry, I was just being flippant.

Now that's what I call black! Very "stealth". Did you paint the wheels? Looks like you need black wheel centres and bonnet badge and it's complete.

There seems to be 4 factors which affect the spec on Canadian instrument clusters on the PET (see attached). It depends on manual (M480), tiptronic (M249), C2 (M338) or C4 (M339). From the attached you may be able to identify the ones you have got, and determine what you need.

I suspect that you will end up at your dealer, and they may be able to re-code the original cluster. I think there is some region-specific coding in the cluster and you will probably be getting conflicts between the DME (and other control units) and the cluster, which houses the OBC, etc.

Coding is done with the Porsche System Tester 2 (PST2) or the Porsche Integrated Workshop Information System (PIWIS). You would need to have very deep pockets to buy one.

instrument_cluster.pdf

I have attached the pages from the PET showing the aerokit for 98-01 models. There is a TSB (03/00) on the TSB pages which has fitting instructions. HTH.

BTW, you need to contribute to see the TSB's.

aerokit.pdf

I've been using this site for years.

http://www.miata.net/garage/tirecalc.html

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Wow! Looks like my calculations were accurate.

If my math is correct, and I haven't over-simplified it:

265 is the tire width in mm, and 35 is the section as a percentage of the width.

Therefore the height of a 265/35 tire is 265*0.35=92.75mm

For a 285/30 it will be 285*0.3=85.5mm

18 inches is 18*25.4mm=457.2mm

Diameter of 265/35 is 457.2+(2*92.75)=642.7mm

Diameter of 285/30 is 457.2+(2*85.5)=628.2mm

Difference=14.5mm or about 2%

First off, he checked fuel pressure already.

Secondly, do the math.  His reported air mass is 5.34 g/s.  Converted to kg/h thats 19.224.  Too high if you ask me AND out of spec according to the pdf you posted.

PTEC

1) I have read through this thread again, and I don't think mumeh has checked his fuel pressure. I checked mine.

2) I did do the math. The spec is 17kg/hr +/- 2,5, which means his his reading of 19.224 is below the top limit of 19.5, therefore within spec.

Thanks for the location of the valve - I'll give it a try over the weekend. I too am very sceptical about this valve being the problem. It's a bit confusing because according to the diagram there are two purge valves. If the one in the engine compartment is just a one-way valve then surely it can't be operated by the DME? I guess I'll find out when I reach it.

My problem isn't as serious as mumeh's as I just get the error codes, not the CEL. However, it's probably only a matter of time. I apologise for hijacking his thread, but we have the same goal. Like him, I am just trying to eliminate the easy-to-fix items before I get into buying expensive sensors and injectors.

I appreciate all the advice you guys are giving. It has given me a much better understanding of what is going on.

The purge valve is in the front right fender well in front of the door.

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Not according to the diagram in Loren's post (on page one of this thread). The EVAP canister purge valve (item 1 on the diagram) shows as being connected to the inlet manifold. The EVAP canister itself is in the front fender, behind the fuel filler neck, but it looks like there are tubes running to the back of the car, where the EVAP canister purge valve is located. The "Operating purge valve" is by the filler neck, but I guess this must be different.

1999Porsche911 - I hope I haven't offended you, as you clearly know a lot more about this than I do. I'm just saying that the MAF readings and idle are within specified limits. Are you saying it is SO critical, that it may be triggering the CEL when the MAF reading becomes close to the limit? You see, mine shows the P1123&5 codes, but does not trigger the CEL. Like mumeh's, it started with an 1123 code, and then developed into both codes.

I have attached the DME setpoints from my manual. It shows idle speed as 680rpm - maybe UK spec is different, in which case I should keep quiet.

I have also come to the conclusion that nobody knows where the EVAPCPV is :( I'm just being lazy really, trying to avoid stripping out a lot of bits I don't need to, and then finding out that it isn't serviceable. I find it strange that the manual gives this as an area to check - isn't it the kind of thing that would cause an air leak, making the mixture lean? Or maybe it is drawing fuel fumes from the tank, having an enrichment effect?

DME_Setpoints.pdf

Sorry. mumeh, I am butting in again, but I have the same interest in this problem as you.

PTEC and 1999Porsche911:

According to Loren, and the Workshop Manual:

27 Oxygen sensing, area 1 Cylinders (1 - 3), P1123 (Short to ground below lower limit/lean mixture threshold) - MIL is on, emission relevant fault

35 Oxygen sensing, area 1 Cylinders (4 - 6), P1125 (Short to ground below lower limit/lean mixture threshold) - MIL is on, emission relevant fault

Possible trouble areas:

- Fuel pressure too high.

- Fuel injector leaking.

- EVAP canister purge valve open.

Why haven't you recommended checking the fuel pressure? Cheap, but not easy if you don't have the right equipment.

mumeh - your MAF readings are within the specification of the diagnosis section of the manual. Idle is on the top limit (680 +/- 20).

If you find out where the EVAP C-P-V is, what it looks like, and if it is servicable, let me know.

Mark

I had the same wind noise on mine, and found that it was because the window was not going high enough. This caused the top edge to get sucked outwards at speeds above about 85mph, and break the seal at the top.

Adjusting the door strike plate was absolutely the wrong thing to do, and I would question that with your dealer. There is a procedure in the manual for adjusting the pressing force of the window against the seals, which is pretty much as PTEC describes. There is also a procedure for adjusting the door window height, and angle in the longitudinal direction.

If you want, I could email you the pages of the manual. PM or email me with your email address if you want them.

FWIW - The DME diagnostic section of the manual shows the Mass Air Flow should be 17kg/hr +/- 2.5

14500/3600=4.02 g/sec

17000/3600=4.72 g/sec

19500/3600=5.41 g/sec

5.34 is definitely not low, and appears to be within tolerance.

Loren, thanks for the drawing of the EVAP canister purge valve - you had sent it to me before. I assume it is attached to the inlet manifold, but before I start delving into it, does anyone know what it looks like, and is it serviceable? A photo would be wonderful. Tool Pants seems to have a photo of every component on his Boxster - how about this one?

I have still got the P1123 & P1125 error codes on mine, but NO CEL. Checked fuel pressure - perfect. I would check the EVAP canister purge valve if I knew where the heck to find it. I have just tried a bottle of injector cleaner in the fuel tank, in the vague hope that this will cure it. I'll let you know if it works for me. Meantime, anyone know where the EVAP canister purge valve is located (inlet manifold perhaps), and what it looks like?

I've heard that this is a very well known problem of 3.4l engines and Porsche redesigned the entire crankcase...

I don't believe they have redesigned it - that's the problem!!!

Thanks PV.

My last question (I hope!):

I know the #009 connector pins go into the instrument cluster plug, and the #010 leads go into the cruise connector, but do I need #009 or #010 leads on the Motronic plug? I know that the pin on the end of the #010 lead is part number 999 652 901 22, but what is the part number of the pin on the #090 lead?

Hopefully our OBC guru (Tool Pants) has the answer :king:

2001 C4 Cab - Uk spec.

I am just trying to get things straight in my mind before attempting this, and have a couple of questions:

1) If the clutch switch is in place and connected, I assume there is nothing more to do with it. Correct?

2) Are the pin connectors the same on the cruise stalk connector as on the motronic plug? (999 652 901 22).

As far as I can see, there are just 5 wires to connect:

Cruise connector Pin #1 to Motronic Connector #IV pin 27

Cruise connector Pin #2 to Fuse B7

Cruise connector Pin #3 to Motronic Connector #IV pin 25

Cruise connector Pin #4 to Motronic Connector #IV pin 19

Instrument Cluster Plug 1 (blue) pin 16 to Motronic Connector #IV pin 18

And activate it with the PST2, of course.

Is it really that simple? :(

Sorry, it's a regular C4 Cab - wishful thinking on my friend's part!

Thanks Jeff

It is a friend of mine who is interested in doing the retrofit on his C4S. I don't think it is a practical proposition to do it on my 98 C2. It seems like the C4S should be fairly straightforward provided stuff like the clutch switch is fitted. We need to start crawling under the dash.

If anyone has actually done it on a 996 it would be useful to hear from them - especially if it was a RoW model. P. Viby perhaps?

Jeff or Loren - Is the Motronic version the same on a C4S as an egas Boxster? (I think it is 7.8 on the later 986 Boxsters). Unfortunately I don't have the wiring diagrams for the later cars - unless anyone can oblige?

Is the cruise retrofit fairly straightforward then? I have seen the Boxster retrofit instructions - any pointers for the 996 anyone?