tholyoak

If done with a PST2 this information is not lost, you simply enter the old and new dme and immob. codes as the same. The tiptronic computer doesn't care.

-Todd

For the sake of others, here is the reply I sent to Rixter.

The simplest way is to use the old 5.2.2 DME to control the 3.2 engine. You do this by flashing the DME with the 996 3.4 program, the maps won't be perfect but they will work ok. You use a cable operated TB. I wouldn't use the 986 2.5L one as it is too small, use a 996 3.4 one. With this conversion you will simply need to add the extra wire, the same as with a 3.4 to operate the second plenum solenoid.

So to summarize, treat the 3.2 the same as a 3.4 except you won't have to lower the engine with the 3.2 manifold. Swap the egas throttle body for the cable one. Use the 2.5L harness as you would with a 3.4 swap and add the extra pin and wire to the DME connector to actuate the secondary plenum. Reflash the original 5.2.2 DME with the 3.4 maps or get custom DME programming of the 5.2.2 ecu.

This way is much easier than swapping in the 7.2 DME.

If you have found this information useful, please consider becoming a contributing member.

-Todd

It really isn't a ring, the cluster acts as a hub for the can comfort and can dme. The CDR/PCM can comfort wires hook into the CAN wires from the HVAC controller, so radio removal doesn't have an effect, other than an error in controller fault memory as it is missing. As Loren suggests you can program the car with the PST such that it is coded without PCM/CDR23. This is how 2002 models are coded as they didn't have the CDR 23 until 2003 but use all of the same controllers, with the exception of the climate control, but I know from personal experience that the 2003 HVAC controller will work in a 2002 coded setup.

-Todd

Actually on 2003 and later vehicles the CDR23/PCM is also connected to the CAN comfort Bus that includes the Radio, cluster and HVAC.

The CAN comfort bus for the radio is used primarily to display the track/station info in the cluster center OBC display but has other functions as listed below

The comfort bus transmits:

A/C request from HVAC controller to the cluster then to the DME via the engine CAN bus

K-lead (diagnosis), allows diagnosis of the controllers via OBDII port

Instrument cluster information (ie vehicle speed for speed dependent volume)

Sun sensor, connected to instrument cluster and used in auto illumination of the controllers connected to the bus as well as regulate the fully automatic climate control. The former function is used in conjunction with the photodiode signal on the front of the CDR23/PCM unit.

-Todd

Check valve plugs directly into the nipple on the rubber sleeve for the cross plenum on the right hand side when standing at the back facing the front of the car, black side to intake, all other vacuum lines except the vacuum for the FPR feed off of the rubber 'T'. The line for the FPR goes to the nipple on the other side of the crossplenum directly.

-Todd

Actually Loren, the B13 is the Speedometer A signal which is the speed signal FROM the cluster TO other units that use this signal. Most obvious is the speed dependent volume on the radio. The later clusters get the speed signal from the ABS controller via the CAN bus network.

-Todd

feel free to pm me

-Todd

This should be easy to diagnose. Are there any immobilizer error codes? Most likely the flash from FVD erased the OBDII reporting and that is why there are no 'codes' in the DME. I have heard this from one person other person in regard to their conversion problems. According to your post this happened suddenly as the car worked when put away so I would check the simple things first. If the car doesn't even attempt to turn over, then the immobilizer isn't releasing the starter and there is an issue between the immobilizer and DME. If so check the fuse in the immobilizer under the seat. If the car turns over but doesn't run, then there is another issue. Could be the DME or a multitude of other things. It is just a motor. It needs fuel, spark and air to run. So does the fuel pump run when actuated, again easy to test with PST2. Unplug the MAF and take it out of the loop. The last step would be to swap the dme with a known good unit and see if it now runs.

If you give me your DME and immobilizer codes I can flash one of my spare DME units and you could swap it in and see if it fixes your problem.

-Todd

Reverse this as it is for a Carrera.

You don't need to reverse it, the cylinder numbering is the same between the Boxster and 911, just the engine faces the other way.

thus the numbering is

-----1--- 2---3

Front----------Rear

-----4----5---6

Not sure if that is what you meant or not Loren.

Todd

Sorry for the confusion but please to a search here this has been discussed over and over.

A 3.4 is a straight swap. A 3.6 will require a bit of work.

-Todd

Sorry, yes the 7.8 DME wasn't introduced until 2003 on the Boxster. I forget it was a year later than the 996. That said, it is just as easy to put a 3.6 in a 2002 Boxster as a 2003, with the exception of buying a new DME, so I personally wouldn't waste my time and money on doing a 3.4 swap on a 2002 (or a 2001 for that matter).

The boxster never received variocam plus until the 3.4 in the 987. The update to the 7.8 only brought along the vane type variocam adjustment of the variocam plus, not the valve lift.

-Todd

Just follow the instruction in the OBD II manual or the service manual.

Might I ask why you are changing your DME?

Well, It seems the polarity was reversed when it was jumped and did damage to the DME. Have any idea's as to what else might be wrong?

Thanks,

Dr. Bailey

Before you replace the dme I would check the fused links under the dash on the passenger side. These blow, preventing damage to the main electrical circuits from things like jumping with reverse polarity.

With a brand new DME you need the old immobilzer and dme codes. the new dme codes are empty and you program them to match the old codes when swapping in a new dme.

Todd

The 3.6 was in 2002-on 996, you reprogram the DME to the 996 maps, yes you need to space down the front motor mount and ideally the rear trans mounts., you can use your old exhaust but it is too small for the larger motor. Sunset porsche is the best place to source a new motor, they can give you the price with core, the total for the motor and core will be in the neighbourhood of $12-15k

Todd

Again, use the search function.

There is no effect on the rear trunk. Visibly you can't tell the difference.

-Todd

The only adapters are spacers to lower the engine in order for the taller 996 manifold to fit under the engine cover.

Your car has a 7.8 DME, thus you do a 3.6 swap or if you are a bit more adventurous you can do a 3.8. Search under my user name, you will find a ton of info.

-Todd

You can't put a 3.4 in your car. You would do a 3.6 or 3.8 swap. Read this site, it is all laid out. The 996 engine swap into a boxster is very simple as far as engine swaps go.

-Todd

As I stated previously, the earlier and later units are not compatible. The pin connectors, while the same, have completely different assignments and only two of the 4 are used on the later controller while four are used on the earlier one. You most likely have fried something. Why ask advice if you are simply going to ignore it?

-Todd

Either the solenoid actuator isn't working, in which case you should get a CEL, or you don't have the DME programmed as a 996.

-Todd

The filter was not eliminated, there is simply no external replaceable filter like the earlier cars. There is still a filter, it is part of the fuel pump/level sensor in the tank and is a lifetime unit.

-Todd

Full dealer list is only $12, just replace it.

-Todd

Keep in mind that the knock control can only pull out so much timing, it is there as a safeguard. By running octane below the requirement you are already pulling out timing under normal conditions. Couple that with otjer conditions such as high temps, and carbon buildup due to in town driving, that can promote detonation and you are gambling with your engine, especially if you drive the car like it was made to be driven. The car has an 11:1 compression ratio, putting in regular gas is just silly.

I really don't understand people who buy a car like a Porsche, presumably because they enjoy the performance driving experience (this excludes those who are just buying the car for a perceived image which is more popular these days as Porsche has shifted to being more of a luxury car company than a sports car company) and then cheap out on things like the recommended gas. Or buy cheap tires, shocks etc. Parts that have a direct influence on the driving experience of the car. Just my $0.02, take it for what it is worth.

-Todd

On the boxster, 2001/2002 is a year specific model using the comfort CAN bus, the 2002 controller is the same as the 2001 but has matte buttons. In 2003 the it was updated for the additional CAN bus communication to the PCM/CDR23. You can use a 2003-later controller on a 2001/2002 but it will have a PCM error. You can't use a 2001/2002 on a 2000 or earlier car, but you can swap the face plates between all the models.

If you want the correct model for your car, I believe I have an extra one kicking around.

Todd

John,

PM sent with my phone number

-Todd

I guess since you are in Europe the model years may differ slightly. In the US the 2002 model did not have a CAN bus to the comfort network and used a different HVAC controller. The 2003-on model used a CAN comfort bus to the PCM/CDR23 and uses a different HVAC controller. Prior to 2001 there was no CAN comfort or DME bus only a CAN bus for the Tiptronic. If you removed the CDR23 this is why you have the error. It doesn't affect the functioning of anything and is a harmless error as far as I can tell.

-Todd

Sounds like you have the wrong HVAC controller. Fault 38 is the CAN bus timeout on the CAN comfort circuit (instrument cluster, HVAC, PCM/CR23).

-Todd