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  1. Don 95Vert

    Does anyone know how to understand SCT logs?

    Just about every draw through car we have seen with an IC has had a VAST improvement in the MAF signal with the addition of another bypass ahead of the IC - and keeping one after. I think that'll really help.
  2. Don 95Vert

    Does anyone know how to understand SCT logs?

    The FP duty cycle is done - no question on that. Your fuel system should be fine - my guess is either the tune wasn't changed to reflect the FP change or maybe you have an in-tank leak so it's pushing fuel back into the tank and the FPs are maxing out - or a dead pump. Could also be inadequate...
  3. Don 95Vert

    Does anyone know how to understand SCT logs?

    The first log looked OK - the problem I saw went away - which would bother me - because it's more likely a stuck injector or something like that. If it happenes in the log again, you can swap injectors bank to bank and see if the problem follows the injectors - then get someone you trust with a...
  4. Don 95Vert

    Does anyone know how to understand SCT logs?

    Thanks so much Chris! As far as the PRP goes, heck, I learned how to tune - not that difficult and a lot of good people like Chris that'll provide help on the SCT PRP forum. I always give a 'starter' tune with the PRP, so you'd be 90% of the way there. The video really works well to get you...
  5. Don 95Vert

    Does anyone know how to understand SCT logs?

    Just had time to glance at them and not study them - but the first log with all that useless data wasn't good for much. The second one was OK, except you should hold the RPMs at different levels longer. Then do a 'loaded' log where you don't go to WOT, but slowly give it gas, then hold it at...
  6. Don 95Vert

    Does anyone know how to understand SCT logs?

    MOST of the time when the FRP sensor fails on a blown car, the engine stops and you have to put a new on on, but I have seen them just do weird things to fueling when they fail but the engine still runs - seemingly OK - usually the pressure drop across the injectors goes all over the place or...
  7. Don 95Vert

    do i have a big problem with my programmer

    It has to go back to SCT - usually that's $150 to unlock it, but MAYBE you can show them proof of the transaction and they'll give you a break - doubtful because of all the Ebay programmers they see. Then you need a custom tune for it - not too expensive - we change $50 for one. Other dealers...
  8. Don 95Vert

    Does anyone know how to understand SCT logs?

    On a returnless fuel system the only thing the PCM controls is pressure drop across the injectors, which should be 39-40ish all the time - it does jump around, but looking at logs, you'll get the picture. Fuel pressure will vary, sometimes a LOT so the PCM can maintain that pressure drop across...
  9. Don 95Vert

    Does anyone know how to understand SCT logs?

    Fix exhaust leaks. They affect everything -not like an old carb car. In a worst case scenario without a tune fixing it, the PCM will apply fueling changes to WOT. Not good for performance, mileage or plug life. To the OP - I'd also look at the fuel rail sensor if this is an electronic...
  10. Don 95Vert

    Does anyone know how to understand SCT logs?

    What you logged is fairly useless for for diagnosing anything at all - when we have people log things for retunes here is the MINIMUM that we require: Ford Datalogging Instructions You should beg borrow but not steal a laptop and use the LiveWire as a pass through logger - that way you can...
  11. Don 95Vert

    TPS voltage at Wide-Open-Throttle Enhancer For 94-95 Mustang 5.0

    Snake oil. TP for WOT in a typical 94-95 from the factory is 642 AD counts - where max is 1023 AD counts just about 5v. So at about 63% throttle, the PCM thinks it's at WOT anyway - don't have to matted...
  12. Don 95Vert

    best way to check the maf with sct x3?

    Actually on an untuned car 980 AD counts is pegged - most tunes, including canned tunes will extend that to 1023 AD counts which is analogous to 5v. To check the MAF, log RPM, MAF volts or MAF AD counts, one of the airflow PIDS, usually #/min, load (which uses MAF input to calculate it). If...
  13. Don 95Vert

    SCT-X3 question

    No, The 91 octane is programmed into it as is the 93 octane - the very first time you use it it saves the stock tune in memory along with the VIN. Any changes you make to the same VIN vehicle is doesn't re-save. Flashing time is cut in half. If you return it to stock, between tunes, which is not...
  14. Don 95Vert

    PCM question

    It's just a later calibration of the same strategy - will work fine and probably will work better. Don
  15. Don 95Vert

    TwEECer & windows7....not friendly???

    Use Binary Editor by Clint Garrity - I use it on my Win 7 64bit PC and it runs fine!
  16. Don 95Vert

    sn95 PCM consistency and PIA factor. Why are the inconsistently a PAIN?

    Grady, Thanks - you are too kind!!! You could easily be a pro too, if you decided to go that route. I'm sure. You already have more knowledge than 90% of the 'pro' tuners I have seen... I might add, the 95-95 PCMs are NOTHING compared to the '05 and up PCMs with the returnless fuel systems...
  17. Don 95Vert

    sn95 PCM consistency and PIA factor. Why are the inconsistently a PAIN?

    I've tuned tons of 94-95's and actually prefer tuning them over Fox bodies - more control. And, as a matter of fact, you can tune any SN95 PCM to act just like a Fox PCM if you like, no problem. Our own SN95 have been through several 'lives' from HCI, to a Kenne Bell SC to now a 357 with a...
  18. Don 95Vert

    Ford GT Fuel Pump: Fuel Pressure all over the place?

    First off, it COULD be the sensor - putting that pump in without a tune could have spiked FP at one point and blown it. Usually won't throw a code like that unless something like that is wrong. Could be a bad FPDM also. Not all that useful to watch fuel pressure on a returnless fuel car - the...
  19. Don 95Vert

    2007 Mustang and xcal tuner 2

    You probably won't have any luck trying to get 'free' tunes because SCT has a new file system where the tunes are tied to each programmer via the programmer's serial number. Won't work if the numbers do not match. They did it to stop people from sharing tunes.
  20. Don 95Vert

    Sorry but what can an SCT tuner really do?

    It's NOT a minimum SALE price it's a minimum ADVERTISED price. SCT could not have a minimum sale price or they'd get in trouble. I don't know how Diablosport gets away with what they do. You can sometimes call dealers and get better prices. But if you see a better price than $379 on an SCT X3...
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