I've never used a handheld programmer and have no knowledge of their operation, i am sure the handheld units off more adjustments but curious if the extra adjustments are worth the added expense over a MAF calibrator, whole bunch of money less but they don't have all the bells and whistles for you to play with..

Air/Fuel Calibrators

Underdog Racing Development

 

Hopefully this is not for the truck in your garage because none of this will apply.. it doesn't have a MAF meter and cannot be tuned with a handheld device.

The MAF "calibrator" is a device that attempts to fool the computer, sometimes this works OK if the particular engine combo only needs a small amount of "foolin" but if it's heavily modified from stock the computer will have to use up most or all of it's adaptive range to make corrections.
A computer tuner will allow you to change the MAF transfer function in computer memory so regardless how radical the engine combo the computer will make accurate calculations the first time around and therefore won't have to make as many corrections. A tuner will also allow you to change trans shift points and just about anything else technically.. though some tuners limit what you have access to.

 

Thanks Paul, I'm aware my van uses speed density and have no plans to do anything with the ECM or A/F mixtiure, just underdrive pulleys and other mods to improve mileage, just didn't know all the advantages a programmer has over a MAF calibrator, interesting..

 

Hi guys can someone tell me how I can tell what system my truck has on it I have an 1990 F350 XLT Lariat CrewCab 460 EFI E40D trans I am in Australia and info is very limited over here I rely havily on these forums
thanks Adam

 

The MASS Air system is easiest identified by the presence of the MAF sensor which will be somewhere in the air intake to measure the volume and density of air as other passes. There should be 4 wires on the sensor (red, blk, tan, and blu)

 

The MAF equipt 460s are rare even in the US. They were only made in 1996/7 and are California emissions or 50 state models only. 1990 will be a Speed Density Bank Fired system. The MAP sensor sits on top of the AC casing near the engine and will have a 1/4" plastic vacuum line to the rear of the plenum and a 3 wire plug.

 

Ah, that's another good way to tell. A MAP sensor will have a vacuum line from there to the manifold. If you still have that sensor and it just has an open port where the vacuum line would go, then it is a BAP.

BAP = MASS Air
MAP = SD

 

RIKIL, the MAF 460s don't seem to have a BAP sensor, I can find no location in the wiring diagrams where it would go.

 

OK, that would be the first time I heard a MASS air system not having that sensor. It could certainly be correct. I wouldn't know how the PCM would get that information, maybe another sensor? Or maybe it doesn't need it, no idea.

 

If Summit Racing is accurate, I see a MAP and a BAP for the 460 and year 1990

http://www.summitracing.com/parts/sm...-size/7-5l-460

http://www.summitracing.com/parts/su...-size/7-5l-460

 

Summit is so erroneous on the 460 stuff it isn't funny. My donor truck was a 1990 F-250, I pulled all the wiring etc. off it, there was no BAP sensor anywhere.

 

I'd say you're correct then. I also found this - Fuel Injection Technical Library » EEC Program Codes

At the bottom it has the 7.5L and they are all SD.

 

The only MAF 460s are 96 and 97 models and probably the MH chassis before they switched it to the V10 mod motor.

 

Ok thank you guys for your help on this very much appreciated I guess I have a speed density system then because I have found the MAP sensor and it has the small vacuum line on it from the manifold and three wire plug and I do not have any air intake tubes as mine has had a LPG mixer fitted in front of throttle body EFI stuff is very hard to find over here in Australia and the speed shops only deal with carb 460s so where can I get a set of exhaust flange plates to suit EFI Heads I have carb 460 headers that I want to fit to my EFI 460
Regards
Adam

 

That will be a big problem. The ports are shaped totally differently on the carbureted and EFI heads.