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Posts posted by JFP in PA

  1. 1 hour ago, jaekormtb said:

    The car is a 1999 Carrera 4, originally sold in Canada, manual, 143,000 miles.

    So an electrical gremlin has emerged. The radio will cut out sporadically, and at the same time, the daytime running lights cut off. The radio will sometimes cut back on, but most of the time I just hit the button and turn it on. The DRL's do not come back on. By turning the switch, I can turn the lights on manually. If I do this, when I hit the brights at night, the   regular lights cut out. When the DRLs are working properly, both beams are on when I hit the brights. 

    I think it's the daytime running lights relay. Any other thoughts?



    Welcome to RennTech :welcomeani:

    Couple of "possibles", bad ignition and/or headlight switches.

  2. 17 minutes ago, c95975 said:

    1999 996 c2 coupe 6 speed 140K


    I have had a stalling problem for about 6 months and 2,000 miles. The engine will stall 1-3 seconds and then fire back up again. It only happens when the car has been run for a couple of hours. It has happened while stopped although mostly while rolling. No codes are flashed and no lights come on when the engine dies. I have had the fuel pressure checked at the rails and it is good. Any ideas?

    Welcome to RennTech :welcomeani:

    Check your crank position sensor, if it intermittently stops working when warm, the DME thinks the engine is not turning and shuts everything off.

  3. 1 hour ago, dphatch said:

    I get "C" codes every time I use my Durametric tool and, in my 12 years of ownership of my car,  have never experienced any issues with systems for which the "C" codes refer. Have also read that these codes aren't  necessarily  referencing a failed system as is the case with "P"  codes but are informational in nature.  Resetting codes will get these C codes to go away only to have them resurface next time I go into the system. In light of the fact that there have been no failures of any of the systems noted by these codes,  and while they may mean something to a Porsche tech ,  I stopped worrying about them some time ago without incident.


    Chassis (C-codes) category covers functions that are, generally, outside of the passenger compartment. These functions typically include mechanical systems such as brakes, steering and suspension.

  4. 39 minutes ago, Mihai Popa said:

    yes, i agree, i have heard only great things about them and the price would be okish but the 3-4 months wait i think its way too much. I have rebuild couple wrx sti engines and they didn't seemed that complicated( but there was a whole lot more information on them than this porsche)this is why i'm thinking at a diy

    Anyways thank you for the info, very much appreciated!


    There is absolutely no comparison between the WRX engines and one of these, have you ever investigated the specialized tooling required (all must haves), and little wonders like installing the piston wrist pin snap rings in one of these engines?  Building a ship in a bottle is child's play by comparison.  A lot of people have started one of these rebuilds, only to never finish them or farm the process out to a shop that has done them.  Be sure you really know what you are getting into before even thinking about tearing one of these engines apart.



  5. 4 minutes ago, Mihai Popa said:

    Got it, i think i will stick with the rebuild since this is a limited edition and i want to keep it as close to factory as possible. do you recommend any shops that do engine rebuilds  at a resolvable price/time ( i called LN and they want 16k for the rebuild and the lead time is 3-4 months) ?



    Hate to tell you, but LN and Jake Raby are the only shops to consider, they simply are the best, and $16K is not that bad a price for one of theirs, particularly as factory remans which are no longer available were going nearly $20K for a short block.

  6. 6 minutes ago, Mihai Popa said:

    Notes, Cheers. 

    any knowledge of ppl from this community swapping the 3.2 engines with 3.4 from the 996?


    It can be done, but you need to proceed with caution as to which years. Reason is that each subsequent year the technology in the cars ( DME version, fuel system, use of CAN Bus technology, etc.) changed, and updating an older car to use the newer tech can be both a bear to accomplish, and result in a "Frankenstein" car with limited resale or trade value.

  7. 4 minutes ago, Mihai Popa said:

    Thank you very much JFP, and yea i will need as much luck as possible 🙂, never really worked on a Porsche before. I found these videos and i see he is using a book for torque specs and other details but i couldn't get a hold of him, the videos are pretty old. Good stuff but not a whole lot of details.



    Jake's books are available from LN Engineering: Flat Six Tech books

  8. 13 hours ago, Krisss said:
    Can anyone help with determining how to change the order of the cables in the plugs to connect bi-xenon headlights
    instead of normal H7 lamps in Cayenne 957 (9PA1)?
    Loren, I know you are one of the most helpful person at this forum. I hope you would be willing to help this time :)


    Unfortunately, this swap is a bit more complicated as the factory HID lights use control modules and igniters that have to be installed in order for these lights to work, and the car has to be coded with a PIWIS to switch from halogen to factory bi-xenon lights or the system will code on you.

  9. 9 hours ago, Mihai Popa said:

    Hello Gents, 

    I recently purchased a Porsche Boxster S 2004 special edition ( gorgeous car with only 24k miles). Purchased it as a fixer upper, initial the owner said it needs a rear main seal, leaked oil and stopped then they took it to the dealership but eventually the owner decided to sell it. Long story short the IMS bearing was destroyed  and now i am looking to rebuild the engine. Mainly just to replace the IMS, ( no other damage to the engine as far i can tell)  but i have a hard time finding any documentation or steps on disassemble/assembling the engine.The Porsche service manual by Bentley does not include this info, i did found some info but this is for a 2001 Porsche S and my understand is that they might are slightly different. 

    Thank you in advanced for your time and consideration.  


    Welcome to RennTech :welcomeani:

    As Porsche never expected, or wanted, field techs to rebuild these engines, they have never published anything on the process, such as proper bearing clearances or even torque specs.  There are sources such as Flat Six (Jake Raby) that run classes on proper engine rebuilding techniques, and have published some information on the topic.


    If you have suffered an IMS failure, one rebuild item that is critical is to get the engine cases and heads ultra sonically cleaned, as IMS failures result in vast amounts of very small metal particles being all through the engine passages, and proper cleaning and removal is critical as just one particle can trash a fresh rebuild.


    Good luck...…..


  10. 8 minutes ago, Derek Pallet said:

    They were checked by a porsche fitter when I had the work done he said the wiring seems ok he used 2 of his own to check them 


    Sounds like he checked the sensor wiring, he needed to check the wires from the sensor going to the DME as well as the out put voltages and voltage curves.

  11. 8 minutes ago, Derek Pallet said:

    The lamda sensors are p0134,p0154 but I don't know the codes for the secondary air vaccum but on my diagnostic it says not passed if that's any help.


    Welcome to RennTech :welcomeani:


    Both codes are for the interruption of the  sensor signal, which is more often a wiring harness issue rather than a bad sensor.  The diagnostic trees for both codes start with checking the wiring harness, not replacing the sensors.

  12. 35 minutes ago, donnporsche04 said:

    Yeah actually I tried that (removing the battery and leaving it for 30 mins, for an hour and even for several days) but nothing happened. That’s why I brought the car to the Porsche dealership but they couldn’t figure out too, it’s like they’re guessing on what is wrong with the car, the problem is they are charging all the parts very expensive (first they told me it’s  the gateway ($500) then the DME/ECU ($3000) and I asked them if this really defective, they said yes but not sure if the car will be fixed. Then I decided to just remove it from them because I don’t wanna spend thousands and not fix the car. They can’t even figure out what is really wrong with the car because their scanner can’t communicate with the other control modules too, their mechanics were all just guessing. But now, I am hoping that the Indy shop can fix the problem and reprogram it back to 997. They were the only one who said that the reason why there’s no communication is because the gateway is now programmed for 991 instead of 997 due to my mistake when I scanned it using the 991 option. I hope they can reprogram it back to 997. 


    IMHO, no one is going to be able to bring the gateway, and or the DME, back.  The dealer had the factory scan and programming tool, the PIWIS; if they could not recover and recode the system, new and very expensive parts are in your future, along with coding them into the car.

  13. 2 hours ago, donnporsche04 said:

    Hello everyone, last January 13,2019 I accidentally reprogrammed my 997.1 to 991 and my car doesn’t allow me to shift into gear. I already brought the car to a dealership but they cannot figure out what’s wrong, they told me at first that the gateway control module is fried then later on it’s the DME/ECU is also fried but I didn’t believe them because  the engine would start and run fine, the only problem is it won’t allow me to shift into gears. Now I towed the car from the dealership and brought it to another indy shop. He told me that the gateway program was changed when I used the iCarsoft scanner and used 991 instead of 997. This is what happened on January 13, 2019, the airbag light went on and I used the iCarsoft scanner to remove the airbag light. When I plugged in the iCarsoft into the OBD socket, I used the 997 program but I didn’t see any fault codes so I explored and went to 991 program and pressed start, after a few seconds an ERROR appeared on the screen of the scanner, then I stopped and went back to 997 program and boom all kinds of fault codes that you can imagine appeared on the instrument cluster and on the scanner. So I started to run the engine, and luckily the engine would start fine but when I tried to shift into gear, the automatic shifter wont allow me to shift it, lights on 4 and P are both blinking. SYSTEM FAULT visit workshop and Software incompatibility with transmission control unit. On TCM the DTC shows fault code “2310 Communication PSM control unit”, “Communication instrument cluster” and on IC it show on DTC “Communication PSM control unit (drive) c152”. And when I started the engine it would show on the IC (instrument cluster the word “ Tiptronic emergency run”).all of these came and appeared on my instrument cluster and scanner. I’m really looking for someone who could help me bring back my program to 997 because according to the owner of the shop, the reason why there’s no communication is because the program right now is 991 and is not compatible with my car other modules. It needs to be reprogrammed back to 997. Need to remove the 991 and reprogram it to 997. My question is there anyone out there experienced the same? Please help. So sorry for this very long story.  


    The iCarsoft scan tool is not capable of recoding your car's DME to any other configuration.  A defective scan tool may be able to damage the DME or other subsystems in the car, but only a few are able to write code to the DME or modules, such as the PIWIS or PST II.

  14. 38 minutes ago, roberta berks said:

    Thanks...Ive had it checked and PIWIS says  rear convenience system control module "no signal or communication"..so Im assuming after I have inspected all wires going to that rear module from dash under seats to c pillar and they all look good ,that I need a new module in your experience?


    Not necessarily, modules sometimes have to be recoded and they come back online, but not always.  Sometimes they are just dead.

    • Thanks 1

  15. 5 hours ago, RAGINASIAN said:

    I noticed a few drops of oil in the bottom of my garage and no puffs of smoke upon drive. 


    So I took my car into a local trusted indie and it looks like I got the bad news. 


    They claim my AOS needs replacement and the RMS or IMS seal/o ring needs replacement.  My car is 996 C4S tiptronic w 78k miles and he claims it will be roughly 20 hrs of Labor or roughly $3k w parts. He claims he has to drop the tranny and engine being a tip .


    It looks like living w it may not be an option. I've read some forum posts and it seems like this job can all be done at once for $2k w parts. Thoughts?? Or  is this legit? Thanks peeps!


    Welcome to RennTech :welcomeani:

    I would ask your tech how he determined the AOS is bad, and what does he base his RMS/ IMS seal leakage upon.  20 hours is excessive, more like 8-10 hours is realistic to pull the Tip and replace both the AOS and either the RMS or IMS seals.  I would also check with another Porsche oriented shop for a second opinion.

    • Like 1
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