Jump to content
CaddyInfo Cadillac Forum
  1. General Cadillac Help and Discussion

    1. 170.1k
      posts
    2. 663
      posts
    3. Cadillac Builds and Project Cars

      Project Cars or Member’s Cars sub forum for the build threads so readers can follow the creation or re-creation of a high performance Caddy. Whether it is a CTS-V, a 1970 Eldorado, a Northstar powered Eldo, etc. , an organized way of finding and enjoying and learning from others who have the need to modify their rides for performance or racing.

      2.1k
      posts
    4. 552
      posts
    5. 15
      posts
  2. Cadillac Clubs are Welcome on Caddyinfo.com

    1. 4.3k
      posts
  3. General Motors News

    1. 2.9k
      posts
  4. Cadillac Help and Discussion by Model

    1. Celestiq

      A magnetic Cadillac

      6
      posts
    2. 2.1k
      posts
    3. 1.2k
      posts
    4. 329
      posts
    5. 184
      posts
    6. 24.6k
      posts
    7. 429
      posts
    8. 524
      posts
    9. 179
      posts
    10. 171
      posts
    11. 40
      posts
    12. 142
      posts
    13. CT6

      Cadillac's Premier Luxury Automobile

      93
      posts
  5. Competitor Cars -- Cadillac Competitors

    1. 79
      posts
    2. 21
      posts
    3. 10
      posts
    4. 57
      posts
    5. 124
      posts
  6. Cadillac FAQ, How-To, Tips and Hints

    1. 1.1k
      posts
    2. 27
      posts
    3. 12.6k
      posts
    4. 1.3k
      posts
    5. 680
      posts
    6. 73
      posts
  7. Caddyinfo.com Supporting Vendors/Supporters/Subscribers Section

    1. Crest Cadillac

      crest2s.jpg


      Crest Automobile Group, Offering Cadillac and Infiniti vehicles. Located in Plano, Texas.

      77
      posts
    2. 3k
      posts
    3. 1.1k
      posts
    4. 41
      posts
    5. B&B Automotive, LLC -- Northstar Repairs

      Looking for a reliable and trustworthy auto repair shop? Look no further! B & B Automotive LLC offers all-inclusive service across most major brands and half off Dealer prices. Featuring Head Studs for Cadillac Repairs.

      107
      posts
  8. New Members Section -- Introduce Yourself & Stay Awhile! Also, non-Cadillac related Topics

    1. 9.7k
      posts


  • CaddyInfo Sponsors

  • Posts

    • I have made progress in reducing the torque management advance (TMA) by RPM Limit Accel Thresh vs. Accel. However, there is still some TMA remaining. I suspect there were multiple sources for the TMA — we solved one. My next hypothesis is that there is some torque management advance coming from boost rate of increase exceeding the allowed pressure delta. https://www.caddyinfo.com/wordpress/torque-management-advance-to-pressure-delta/
    • After replacing the steering wheel related parts and sensors,in the event of a related failure, you need to perform calibration.So here I will show you the guide on how to use launch x431 to calibrate steering angle sensor for Cadillac XTS 2013.For more repair case about Cadillac,please check here:Cadillac Trouble Repair What You Need? Launch X431 V+ Operation Procedures: 1) Choose SGM software, use “Automatically search”, find “Quick test”,to scan all system inside the car 2) Choose “EPS” 3) Choose “Special function” 4) Find “Center steering wheel angle sensor”, press “Yes” to continue 5) Start engine” to continue 6) Read the prompt”Slowly left, and then slowly to the right, last back to the steering wheel” 7) Function finished. More test report about Launch X431 please check:Launch X431 Test report
    • This tune had a couple of fixes to try to eliminate the torque management advance. They were partially successful. Previous run showed two spikes with up to 12 degrees of torque management advance; this run had one spike with only 4.2 degrees. Although there is still some TMA, this was progress. I have been showing the graphs as xy graphs, hp to rpm for example, which is the way a dyno might show similar data. However, this does not consider the time aspect — it takes much less time for the engine to get to 4500 rpm than from 4500 to 6500 for example. This shows time offset from hptuners scan along the X axis instead of RPM. My impression is that they are time in seconds of the scan. It is time correct, and RPM builds from left to right but I have not discerned a best way to show both the HP vs RPM and HP vs TIME on one chart yet. This second chart is useful however for understanding when events occur in time — go WOT, tip-in and boost, torque, and RPM build rapidly. A largely flat torque curve that matches the boost curve. The remaining TMA retard appears to coincide with rapid boost development. My next test will be to see if that is a limiter. View the full article
    • Today’s scan was with traction control disabled, to determine if the Torque Management Advance (retard) (TMAR) was originating from TCS. I observe that we still have TMAR with us, so I conclude it is not, and further study will be required. Comparing today’s D5SB with prior D5SA, today’s peak was 468.9 whp vs prior peak 476.8 whp, or 8 less. Prior was a warmer day with somewhat higher humidity and earned a larger dyno correction of 2.4% vs 1% today. I am looking for repeatability here, and under 2% may be par for this type of testing. Read more: https://www.caddyinfo.com/wordpress/traction-off-torque-management-continues/
    • Scan D5BToday’s scan was with traction control disabled, to determine if the Torque Management Advance (retard) (TMAR) was originating from TCS. I observe that we still have TMAR with us, so I conclude it is not, and further study will be required. Comparing today’s D5SB with prior D5SA, today’s peak was 468.9 whp vs prior peak 476.8 whp, or 8 less. Prior was a warmer day with somewhat higher humidity and earned a larger dyno correction of 2.4% vs 1% today. I am looking for repeatability here, and under 2% may be par for this type of testing. I have added relative humidity to my scan table, so that the resulting scans can be self-correcting for conditions via dyno correction factor. The car tracks barometric pressure, relative humidity, and ambient temperature. With those figures an SAE 1349 dyno correction can be applied, and is figured in prior to graphing. I am also using a 400/464 ratio here for crank to wheels; I find this matches precisely with stock results. Stock vs GM DynoThis graph takes the GM LF4 engine dyno, converts it to wheel torque/hp, and compares it (dotted lines) to a scan from a stock ATS-V also converted to wheel hp (solid lines). They appear to overlay nicely. View the full article
  • Last 25 Members logged in

  • Member Statistics

    • Total Members
      25,263
    • Most Online
      779

    Newest Member
    Travis G
    Joined
  • Gallery Images

  • Popular Contributors

  • Recent Status Updates

    • travisjakob

      The Fix-It List
       
      This is mostly for my own memory. Help is always appreciated but never expected. 

      To begin, we have already got some new tires, and I learned at that shop that my rear tire cambers -3 degrees, and the front is bent in a bit. But before I get an alignment, I need new struts all around. *smurf* is getting expensive.
      Put in Marvel's Mystery Oil to quiet a lifter tick, and so far, it's not doing that much; need to drive more miles with it. ATF was thrown in too so I can save my Marvel's Mystery Oil. 
      Next week I need to go and get a tune up; basically, need fuel filter and spark set/distributor. 
      I am missing some underhood relays from the car. Can't tell what they are supposed to be, but I can bet its all three cooling fan relays.
       
      Current Issues (prioritized):
      Lifter noise from the engine Exhaust smelly, and excessive (diagnosed; tune up will fix it) Wheels unaligned, cambering, and could cause tire damage Leaks: puddle on the valve train. Obvious gasket issue. Leak in the back end of engine, but isn't worth the lift oil had never touched the ground, so this isn't too too bad. The oil near the valvetrain is sus though Electrical: Climate Control only turns on sometimes. Looking at wires soon but it could be the panel or BCM.  Cruise Control is obsolete. Not switching whatsoever. Fuse, wire, or connector issue? Switch? ABS brake lock and traction will flicker on and off sometimes. Wire issue for sure. A/C service light on; may indicate lack of refrigerant or that the relays are out. Radio disconnected; previous owner wanted to get subs. Little did they know these cars are 50% wire.   
      Here is what parts Eve, my little devil, needs:
      TUNE UP: Fuel filter, distributor cap + rotor, spark plugs + wires. quoted at about $400 Struts all around and alignment. maybe $500? got a rough joint too Valve gasket $20 Lifter (?) Still gotta figure out if Marvel's or ATF can clean it up more, BCM? Still looking into this one, but I'm hearing every 90s Deville owner should keep a spare.  Radio wire connector wires need to be connected again and we need to investigate more  That is my comprehensive list for my ADD brain. All this figured out in one week. Bought the car ten days ago and she's made me give nothing but attention to her. Hope it's all worth it! 
      · 0 replies
    • Dave42  »  Jan Olsson

      Hey Jan
      I have a friend in his 80s with a 81 Eldorado Barritz his mechanic swapped out the computer loosing the memcal chips any chance you might know where I can help him find either the memcals or a salvage computer?
      · 2 replies
    • ChrisNederland  »  BodybyFisher

      Hello, do you still have these shocks for Sevilla?
      · 4 replies
    • rockfangd

      Merry Christmas Everyone.
      Thank you to all of our loyal members
      · 0 replies
    • monoloco38  »  BodybyFisher

      Good morning Mike. I've been searching in the forum about rich cold start. I have a 1993 Cadillac deville 4.9 v8. I've done maintenance. full tune up. Plugs, wires, cap and rotor. New EGR, and new PCV valve. Throttle body cleaned and air intakes (those were bad) checked the timing yesterday (at 24 degrees) don't know why but I'll bring it down. Cold start rough... too much fuel. Runs perfect after warm. Any suggestions about the rich cold start? Any info it would be much appreciated. thank you. 
      · 4 replies
×
×
  • Create New...