1. JamesBB

    P38A GEMS idle problem

    Yes I was getting excited too. I saw it there and could not remember what colour dot was good news. Its a blue. Not until I got home that my extra level of excitement dwindled........
  2. JamesBB

    P38A GEMS idle problem

    Hi All here is an update. I swapped the MAF for one from a scrap yard and its all back to normal. Starts instantly and idles around 700 pm, in fact, it has never idled so smoothly. Picked up loads of spares too from the old P38 that was being torn apart. TPS, IACV, all temp sensors, grabbed a...
  3. JamesBB

    P38A GEMS idle problem

    Some readings after 5 mins of good idling: Coolant temp = 61C Intake temp 22C RPM = 625 TPS Volts = 0.65v Short term fuel trims bank 1 = 24.2 Short term fuel trims bank 2 = 24.2 MAF (CFM) ranges from 0.5 to 1.2 which seems amazingly low. If I unplug the MAF nothing happens at all now. Plug it...
  4. JamesBB

    P38A GEMS idle problem

    Agreed on the GEMs by Poole, but it was recommended by a reputable source and is essentially the same engine management. Reading voltage with GEMS Lite not a DVM. Engine temp was measuring about 45-50 degrees at the time I last checked so warming up. Understand Nanocom Evo is new standard...
  5. JamesBB

    P38A GEMS idle problem

    I do not think its coil pack related, it was all ok until the MAF cable fell apart and I resoldered it. Checked TPS voltage, back to 0.65v before attempting to start. Looking at other reports and some Youtube vids it seems to not be unusual to see the TPS down below half a volt at closed...
  6. JamesBB

    P38A GEMS idle problem

    Thanks. The 0.85v I quote comes from page 16 of the GEMS by Poole manual as supplied by Saint.V8. It also states lower values may result in poor idle characteristics. That is all I have to go on. I will double check the TPS voltage with the engine off again. I am not sure I have anything that...
  7. JamesBB

    P38A GEMS idle problem

    Hi Guys Bringing this thread back to life sadly as I have issues again. Sorry if it appears twice with slightly different wording, my session timed out and I needed to log in again (losing what I had written). Started with routine maintenance and cleaning in the engine bay. Basically the MAF...
  8. JamesBB

    P38A P38 Sunroof Woes

    Another quick update. Managed to find other sunroof motor related posts on here, found out how to re-engage motor by twisting back a quarter turn. All now ok. Not the smoothest at tilting (by manual or motor) but it all seems to work and did not seem to leak in the recent heavy rain. On to the...
  9. JamesBB

    P38A P38 Sunroof Woes

    Update time. The sheet of wood is now removed from the car's roof. I have a re-built sunroof made from some of my original parts, a RR Classic slide and tilt rail (they are the same) and a new used glass that is is really good condition (came with good seal). It operates really well manually...
  10. JamesBB

    P38A P38 Sunroof Woes

    All great points and I do keep up with maintenance on my cars knowing they are all way way way beyond the intended life of the manufacturer and other than the P38 which at present just needs a sunroof (or seal) the only car off the road has turned itself into a long term project due to a...
  11. JamesBB

    P38A P38 Sunroof Woes

    Now that would be fair. "That'll do!!" " An unbelievable piece of design, ruined by minkies......"
  12. JamesBB

    P38A P38 Sunroof Woes

    I think I have possibly found someone that has a good glass and frame. However, I must say that to refer the entire car as a bad design is not entirely fair.:( Thanks
  13. JamesBB

    P38A P38 Sunroof Woes

    Thanks for the tip. I wondered if a cassette would be a better option. The problem is all of the cassettes I can find on ebay at the moment are in really rough condition. Some show rust under the glass edge, so I fear I will be back to this same point in a year or so. Looks like the guy you...
  14. JamesBB

    P38A P38 Sunroof Woes

    Hi All Long time no posting...... Odd for a P38 owner. :-) My sunroof started to refuse to close and stayed up one side. I decided to remove the entire thing and work on it out of the car. I have ordered some new plastic guides for both sides as part of a repair kit but they have not arrived...
  15. JamesBB

    Annoying squeaking while driving.

    Just to let you all know the problem was fixed 4 years ago as pointed out. However, I do have another annoying fault as of today. I will post a new thread about that though and see if we can resurrect it in a few years time :-)
  16. JamesBB

    P38A GEMS idle problem

    Just cleaned, new gasket and reset adaptive values. Idles fine when started from cold. Idles low - stalls when warm unless you rev it, then idles fine.
  17. JamesBB

    P38A Direnza Stainless Steel Exhaust

    Hi All Just had my local indy fit one to my 1996 4.6 HSE. I would have done it myself but forgot I needed new hangers welded on the passenger side to accommodate the rear which had not existed on that side before now. So I decided to get it all done for me. They did a great job as always...
  18. JamesBB

    P38A GEMS idle problem

    Interestingly enough, the original issue I had (and have had for months) is actually still there after all this work. That is, once the engine has run long enough to warm up (not even to operating temp, so still just in the blue zone) if you switch off (for instance to pump fuel), when you...
  19. JamesBB

    P38A GEMS idle problem

    OK guys, sorry for the delay. I have been away and also hunting a TPS. So, its fixed. Second hand TPS fitted properly so that its not under excess tension from the springs. New gasket on the IACV. Adjusted throttle springs to make sure its closes the throttle fully, but not with any large...
  20. JamesBB

    P38A GEMS idle problem

    Checked the plenum and the rocker breathers which are brand new, no visible leaks. The clamps either end of the large induction hose are tight. Some data prior to reset (engine not running): TPS Close Throttle Value =0.045 Fuel Flow Rate =0.092 Air Flow Rate =2.1166666 Short Term Idle =0 Long...