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  1. Mustang5L5

    93 5.0 Microsquirt with Stage 3 trickflow tuning issues

    That's how mine is setup. It should maintain a very low idle with it unplugged. The IAC is just there to trim it out. Right now your are maintianing idle 100% by the IAC valve. You can try opening it a few turns. Start engine, unplug the IAC and then walk it down a bit to a very low idle...
  2. Mustang5L5

    93 5.0 Microsquirt with Stage 3 trickflow tuning issues

    One thing I see. I can't open the log (due to being at work on a different PC) but looking at your screen grab, i see your oscillations are somewhat related to a rise in AFR and a rise in target AFR. I can't see what VE cells it's bouncing between but it look like the AFR goes lean. usually...
  3. Mustang5L5

    93 5.0 Microsquirt with Stage 3 trickflow tuning issues

    If you unplug the IAC with it running (fully warmed up), does it stall? Or does it maintain 1000RPM? I'm wondering if the blade is just not adjusted properly. If you have to apply throttle to get it to restart then there is a setting for that under idle called "Idle cranking steps" or...
  4. Mustang5L5

    Engine Dreaded 5v reference

    So you have 5V on the tan wire when you backprobe? What about when you front probe by unplugging the sensor with key on? Are you able to get 5V from the physical connector that contacts the MAF pins? You can also test at pin 50 on the ECU which is your signal return. Pin 9 is your 5V reference.
  5. Mustang5L5

    93 5.0 Microsquirt with Stage 3 trickflow tuning issues

    The higher the pulse width, the longer the injector stays open. With my 47# injectors, i see about 2.5ms at idle for pulse width. I'd expect with 24's it to be about double so 4-6ms. 10 is a bit high. I see that with a light rev. Something in the tune is commanding more fuel. What...
  6. Mustang5L5

    93 5.0 Microsquirt with Stage 3 trickflow tuning issues

    Good luck. Let us know how it turns out
  7. Mustang5L5

    93 5.0 Microsquirt with Stage 3 trickflow tuning issues

    I think you do need some local help or remote help. The way we are going about this just isn't going to work. Hop on Corral.net and seek out LowRanger96 He's a tuner. Not sure if he does remote tuning but I think he does. I don't think he's on this forum
  8. Mustang5L5

    93 5.0 Microsquirt with Stage 3 trickflow tuning issues

    Still the same. Much lower amount of logged profiles. One thing i've learned is that Microsquirt also doesn't seem to do idle timing correction. You are locked at 18 degrees. Try backing the timing in those cells down to 16 and see if idle quality improves a little.
  9. Mustang5L5

    93 5.0 Microsquirt with Stage 3 trickflow tuning issues

    SO they are the new Ford Racing LU24A's? https://performanceparts.ford.com/part/M-9593-LU24A If so, here's the dead time curve at 39psi SO based on Microsquirt wanting the value at 13.2 volts, that works out to 0.97 assuming your static fuel pressure is set to 39psi. If not there are...
  10. Mustang5L5

    93 5.0 Microsquirt with Stage 3 trickflow tuning issues

    Which ones and how old? The older EV1 style injectors like the 93 Cobra? Or newer USCAR-car connector style injectors. How many years old are they and how many miles? I think i'm going to have you change that number down. Just not sure what yet. That should shorten your pulsewidths at...
  11. Mustang5L5

    93 5.0 Microsquirt with Stage 3 trickflow tuning issues

    I think you are hardware limited. I looked at the logging profiles and you have everything turned on. It;s just limited by what the microsquirt can output. For example, this is one screen that I can see on my MS3 setup. (this was a cold start) I have many other screens based on what i'm...
  12. Mustang5L5

    93 5.0 Microsquirt with Stage 3 trickflow tuning issues

    I didn't even see a fan configured. Did you set one up? I think the challenge i'm having is that microsquirt datalogs so few values that it's not what i'm used to seeing with my MS3. I'm simply not experienced enough to bang out a functional tune with so little input. I still see you running...
  13. Mustang5L5

    93 5.0 Microsquirt with Stage 3 trickflow tuning issues

    WHy did you go with the microsquirt instead of the stock ECU?
  14. Mustang5L5

    93 5.0 Microsquirt with Stage 3 trickflow tuning issues

    There's probably still a number of tweaks that need to be made. Your warmup enrichment prob needs to be tuned. If you go over to the VE analyze tab, there is a tab for warmup enrichment tuning. Enable that and let it run one full warmup cycle and make some adjustments. Have it run all the...
  15. Mustang5L5

    Fox Fuel Pump Issues After Replacement/Upgrade

    155 does not need upgraded wiring. I ran a 190 for years on stock wiring without any issues (that weren't of my own doing). It might be in your best interest to get a fuel pressure gauge and actually monitor pressure during these events to determine if this is fuel related or other. Granted...
  16. Mustang5L5

    Fox Tire Size for 16" Pony Wheels on 1984 LX Convertible

    I ran 245/50/16 on my pony wheels on my '88 LX. I had some very slight rub at full lock on the inner fenders. It's the extra width of the tire which rubs the sidewall on the inner plastic fender. Adding some rack limiters helped. It was certainly liveable and only an issue when i turned...
  17. Mustang5L5

    93 5.0 Microsquirt with Stage 3 trickflow tuning issues

    I see it now. Looks like your idle surges in time with some instances when you go a little rich. Your average AFR is 13.4 but commanding 13.5/13/6 which isn't bad. But you might have to experiment with either adding fuel to lower it down to 13.0-13.2 or taking fuel away to come up to...
  18. Mustang5L5

    93 5.0 Microsquirt with Stage 3 trickflow tuning issues

    Try this. Made some adjustments to your AFR table and VE table based on what kpa you idle at. I still can't see your datalogs however. Not sure if that's a me problem so if someone else on the forum can check.
  19. Mustang5L5

    93 5.0 Microsquirt with Stage 3 trickflow tuning issues

    Oh i'm not a tuner. I know enough to be dangerous but that's about it. Not sure how much more help i'll be here. For some reason your datalogs are missing a lot of info when I view them. For instance i cannot see your AFR. I dpn't even see it as an option under your datalog logging...
  20. Mustang5L5

    93 5.0 Microsquirt with Stage 3 trickflow tuning issues

    What was your AFR when it was idling high? If rich, you can try pulling some fuel out and that might lower your idle a bit. If the AFR is close to target, pull a little timing out from those cells and see if that makes a difference. I saw you were at 22 degrees? Try 20 degrees or 18...
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