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JFP in PA

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Everything posted by JFP in PA

  1. JFP in PA
    U0404 - Software incompatibility with transmission control module - signal implausible. A U0404 code on a Porsche 997 indicates an issue with the Electronic Shift Module (ESM). Specifically, it means the Powertrain Control Module (PCM) or Transmission Control Module (TCM) has received implausible data from the ESM. The ESM itself could be malfunctioning, sending incorrect data. The Transmission Control Module could also be the source of the problem, either by not processing the ESM's signal correctly or being faulty itself. Damaged wiring, loose connections, or corrosion in the wiring harness connected to the ESM can also cause communication errors. Some deeper diagnostics are going to be needed to decide how to proceed.............
  2. JFP in PA
    Welcom to RennTech Before considering replacing ANYTHING, first do some diagnostics: Using a Porsche specific scan tool, check for any pending codes, check all four O2 sensors for function and voltage readings, check the MAF for voltage readings, and run A/F ratios; then and only then will you have the information about what, if anything, needs to be addressed.
  3. JFP in PA
  4. JFP in PA
    I would be checking the power supply wire to the actuator to measure voltage and voltage drop.
  5. JFP in PA
    Not really, I don't think the bolts will completely come out with the coolant pipe in the way.
  6. JFP in PA
    Try looking along the lefthand kick panel/carpet, you may need to remove it to see it.
  7. JFP in PA
    I would be VERY suspect of any vehicle with VIN numbers defaced or totally missing. 1988 Porsche Carrera obd port location Your 1988 Porsche Carrera, being an older model, won't have the standard OBD-II port that is found in vehicles from 1996 onwards. Instead, it will have a pre-OBD diagnostic connector. 1988 Porsche Carrera Diagnostic Connector Location: 12-pin rectangular diagnostic connector: The 1987 and 1988 models utilize a rectangular 12-pin diagnostic connector. Location: This connector is located on the ECU mounting panel. It was intended to be used with the Porsche/Bosch 9268 interface, also utilized on 944 models of that era. Important Notes: ECU Location: The DME (Digital Motor Electronics) control unit (ECU) in a 1988 Carrera is generally located under the driver's seat. 1989 models and later: Porsche began using a round 19-pin connector in the 1989 models, which is located under a cover at the passenger seat. Adapter Needed: To use modern diagnostic tools, you will likely need an adapter cable that connects the 12-pin diagnostic connector to a standard OBD-II port.
  8. JFP in PA
    There are multiple possible reasons for coolant getting into the oil; a cracked head or cylinder liner are not uncommon, but often not the source of the issue. These cars use oil to water oil coolers, one on the engine, the other for the trans if it is Tip equipped. Long before I would be ordering in another engine, I would be pulling these coolers and either pressure of vacuum test them for leaks. If the cooler(s) fail the test, that is your source of the problem; if they pass, you may have bigger issues. Good luck.
  9. JFP in PA
    These pins typically have a small pop up tang that needs to be depressed and held down while they are extracted. That requires a set of pin removal tools:
  10. JFP in PA
    You need a copy of the car's wiring diagram.
  11. JFP in PA
    2003 should have fixed, non removable tubes.
  12. JFP in PA
    On some models, starting in 2002.
  13. JFP in PA
    Welcome to RennTech Both shops are probably basing their estimates on the later engines that have fixed non removeable tubes, which do require pulling the cam covers to reseal. On yours, the tubes are removable and can be resealed, but car we get in the shop we would typically replace both the tubes and the seals because these tubes are plastic which harden and often crack and leak in other place than where the Orings seal them. Another and more pricey option is to replace the plastic tubes with aftermarket aluminum replacements that will never harden or leak.
  14. JFP in PA
    Sunset Porsche has the 996 612 953 01 for about $84
  15. JFP in PA
    If the monitors do not reset, there is still a fault in the system. Look again..........
  16. JFP in PA
    On the early Boxster's, it often takes a couple hundred miles of driving for these monitors to reset.
  17. JFP in PA
    You need a Porsche specific scan tool to see the faults, something like the Durametric system or a PIWIS system, no other scan tools will be able to see the faults.
  18. JFP in PA
    Either way, we like to clear the code and see if it returns.
  19. JFP in PA
    Diagnosing the car with the PIWIS system, replacing the DMTL tank leakage module if required.
  20. JFP in PA
    Not really.
  21. JFP in PA
    I would suggest contacting the compressor manufacturer and ask their advice as most of the PAG oil function is in protecting the compressor components. You can also purchase an AC flushing kit, which uses a solvent run thru the system to remove oil and any metallic debris from the system, and leave the entire system clean as it was new.
  22. JFP in PA
    P0421 is the code for a possible catalytic converter issue. Get the car scanned with a Porsche specific scan tool and check the O2 sensors for correct function.
  23. JFP in PA
    The code is for an open circuit, which are usually harness related.
  24. JFP in PA
    Battery reserve capacity are directly correlated to their size and weight (bigger and heavier, more metallic lead and lead oxide, which equals more capacity). Long before I would be looking at an Optima, I would be considering the Odessey AGM battery line. And yes, I was an Optima fan for many years, but after several ownership changes, we started to see brand new Optimas that were 7-8 pounds lighter than the same model they replaced, which is not a good sign.
  25. JFP in PA
    Only valid resources would be the diagnostics listed on a PIWIS system as none of this information was ever in print. Using the list I provided, you should be able to assume some basics like wiring continuity, wiring shorts to ground, voltage readings, does the cam angle change when activated via Durametric or PIWIS, etc. You need to remember that even the OBD II diagnostics manuals for the earlier cars only provided a sense of direction, not a set of directions. You need to get out your digital multimeter and start poking around............
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