-5.4l 3v crate motor, 50k KM on it by now.
-Banks High Ram Cold Air Intake.
-Ford Performance 24lbs/11-18ohm 6hole injectors M-9593-LU24A (followed their spec sheet to adjusts tune for them)
-1.75" Tuned Long Tube Headers 304SS high flow CAT, 1 upstream and 1 downstream O2 per side before 3" y-pipe.
-New with engine, upstream O2 Motocraft Sensors.
-BBK 80mm TB w/ new NAPA TPS and Control Motor.
Basically I'm in it for the long game. Learning and tunning as I go.
So far as mentioned I adjusted for the new Injectors as per FordPerformace Data Sheet on them. Upgraded due to one of the 300k km injectors was sticking open once n awhile.
I've rocked the Banks Cold Air intake well before this engine and modifications. No tune specifically for it. Upgraded it just because its BANKS and I've always been a fan of the washable filters, got it down to a science. just buy 2, always got one refreshed and ready, so every 25k km i hot swap out during oil change
The OEM 75mm TB motor control died, so figured ill try the BBK TB. I will say the reviews arnt wrong it's kinda a pain in the dick to get set up. Defiantly need to modify the plastic of the control motor and hold your tongue right putting it together to get the blade to rotate smooth. Had to back the mechanical spring back screw off, It's spring tension is to aggressive and gave a EngineFailSafeMode code for stuck open. I first tuned for the TB by increasing the TB Effective Area chart by the inverse of the 75mmArea/80mmArea. But by TB version 4 I put 1deg back to stock, and cut my 2.5deg increase in half.
Shortly i'm going to be upgrading oil pump replacing timing chains, cams, and upgrade the lifters and roller followers (ex mechanic dragged the passenger side threw the dirt, had it tappin since new, but now sounding dangerous.) when that happens i'm going to have the intake manifold off, so im going to hone the throat out to 80mm to match. I will also be seeing if I'm lucky enough that the OEM mechanical spring 0deg spring back will fit the BBK TB, as with it backed off, there's now the rarest chance there's not enough spring back to bounce the blade off 0deg sucked closed. (happened twice over the course of the 40k km)
I'm also curious on if the IRCM is going faulty or is carboned up or if the ex mechanic has some wire harness's against is hard.
(side note, anyone know some subtle or obvious indications of a poorly functioning Intake Runner Valves?)
Long tube headers because manifold leaks on this 5.4l is notorious for leaking and my ex mechanic installed Headman Stainless Ceramic shorties but he warped them trying to seal them to eh y-pipes constantly lieing to me about the leak with excuses like oh your cats are getting thin it's not the 2bolt flange leaking. So one quick stop at SummitRacing and the American Racing Headers were at my door in no time and I installed them in a day. Engine in bay.
That's about all the history I can give a fella off the top of my head, so now onto my question.
I'm having an issue with idle, once and awhile comming up to a stop and or sitting at a stop the idle fluctuates form 550RPM to 650ish 700 witch is enough to push the truck. Been logging files for quite some time, I've noticed the desired TB deg is 1 or 0, yet the TB is bouncing 0-5deg. all while the STFT's are bouncing first.
I'm also watching the Fuel trims and O2's just consistently bouncing. I'll upload two Logs and my 2 tunes.
First Log TBv4 and tune is my latest one, and the log starts from a fresh flash, so there's no real LTFT in memory. But watch it closer to the end of the trip and the trim and 02's just can't get along. (HomeToWork TBv4)HomeToWork TBv4.hpl 5.4l Injector WITH BKthrottlebody v4.hpt
Second log is with my TBv2 and is after quite a few days/ engine cycles. (PARK= mainly sitting in park Engine Warm idling, HomeToMall= average drive form my country house to the big city, lost of idle issues in the city)Park.hpl HomeToMall 10cAmbiet.hpl 5.4l Injector WITH BKthrottlebody v2.hpt
So take a look at the log and let me know what you guys think is going on. Tune failure or Mechanical Failure
P.S. just remembered when reading my Log Files Name, both my ambient sensor and IAT are reading wrong. if its only 10c ambient out the ambient sensor is reading -2c and IAT is at 10c, both MAF and Ambient sensor has been replaced and wires tested for shorts/ resistance. No change occurred, is this just HP tuners reading wrong or needing calibrated?