Free VE Table Corrections — Drop Your MSQ and a Datalog, I'll Do the Rest

[X-cam34]

I noticed that you likely have Warm Up Enrichment running too long. Should be 100 at 160 --

I am attaching my latest tune so you can maybe pull some settings.



Model/Year: 1993 Ford Mustang (Fox‑body)

Engine

Base Engine: 5.0 L Windsor small‑block (306 bored over)

Camshaft: Ford Racing X‑303 roller cam — 286° adv / 224° @0.050", 0.542" lift

Trick Flow R series intake

Trick Flow lower

Dss flat top pistons.

Throttle Body: 90 mm aftermarket unit

Intake: Cold‑air intake (fender‑mount style)

Fuel Injectors: 34 lb/hr from a friends coyote

Fuel Pressure Regulator: OEM (vac‑referenced) — base 39 psi (assumed)

Wideband O₂: AEM X‑Series 30‑0300; analog 0–5 V signal wired to DB37 pin 23 (EGO1)

Exhaust

Headers: Shorty headers (equal‑length, 1‑5/8")

Mid‑Pipe: High‑flow crossover (X‑pipe

Full 2.5" exhaust with Borla ATAK mufflers ( no cats)

Engine Management & Tuning Hardware

ECU: MegaSquirt PNP‑2 (MSPNP2‑EEC48A) — hardware v2.0, firmware 3.4.4

Transmission: Tremec RS‑7003J Magnum 6‑speed (retains mechanical speedo output)

Rear Gear: 3.73 8.8” axle

Auxiliary Systems

Cooling: Aluminum radiator Moshimoto

Ignition: Demon Coil

WOT AFR: 12.5–12.8 : 1 (stable)

Peak Injector Duty: 91 % at 5450 rpm, 100 kPa

 

[Dontknowchit]

92 gt vortech v3 si, baby cam, stock heads & bottom end. 72lb injectors, 14 psi trying to get tune dialed in for eventual e85 upscaling. Issue is idle w/AC, i can get a no AC idle good and at a decet afr, but as soon as ac comes on (ac system is brand new top to bottom and working great) it starts surging. If I add fuel to combat the surge, the non ac idle is excessivley rich. Attempted all the PID, Duty adder, dashpot, idle up timing ramp ect dials and cannot find a middle ground where idle reasonable in both senarios that is not overly rich or surging. Have had 2 tuners try to help me and yet to have a surge free idle w/ reasonable AFR. This is a second car for us but with a teen driver, it sees more and more daily use.

 

[X-cam34]

@Dontknowchit I need to change my instructions, tool requires the .msq now in order for it to run, it gathers multiple settings from the tune. So whenever you get around to it drop the .msq please.

 

[Dontknowchit]

here you go, thanks

 

[X-cam34]

@Dontknowchit

Edit: Updated.

 

[X-cam34]

@Dontknowchit @infamous ---- any udpdate?

 

[Dontknowchit]

I will get you some data. It's been a trip. Had a brake booster vac leak I had to fix I finally just today was able to get rid of my terrible surging idle by totally nukeing my IAC controls down to next to nothing. Had to raise the VE considerably to get it to stay running before that so have yet to actually run it. Hopeful that I can now return it back down closer to reasonable without it starting again. All the out of idle cells looked reasonable but have yet to actually get a good clean log.

 

[X-cam34]

Good deal ! thanks for the feed back I am leaning toward making my tool free and just hosting on github. With all of the data i have gathered across this site and multiple others, my car is running great! It pulls as hard to 150 mph as it used to to 90 so for that I will repay the community....

Just gotta make a few more tweaks before i turn it loose.

 

[X-cam34]

Free VE Table Corrections — Drop Your MSQ and a Datalog, I'll Do the Rest - Page 6 - Megasquirt Support Forum (MSEXTRA)