The Ford Barn - View Single Post - Let's start a junkyard fuel injection discussion

demiller · 02-15-2021, 12:56 PM

Would this suggest you are using a "speed density" system,or does the MAF system use MAP sensor as well?

Thanks for the guidance Jim.

Cheers[/QUOTE]

A mass air flow(MAF) system would be more desirable than a speed density. I know that a late 80's early 90's Chrysler MAF sensor is also a MAP sensor, my old man memory is not sure if GM and Ford also are. The weakness of the early GM ecms was the fuel maps were all in the prom to change one that the self tuning wouldn't correct the prom had to be change. The aftermarket may have had a tuner that with the aid of a laptop could change the maps on the fly...never having been a GM guy I couldn't say. The Fords of the same era had a covered service port on the ecm where aftermarket "tuners" could be attached to modify the fuel and timing maps. The 5.0L Mustang guys were their target costomers

02-15-2021, 12:56 PM	#42
demiller Junior Member Join Date: Jun 2017 Location: Langley BC Posts: 2	Re: Let's start a junkyard fuel injection discussion Would this suggest you are using a "speed density" system,or does the MAF system use MAP sensor as well? Thanks for the guidance Jim. Cheers[/QUOTE] A mass air flow(MAF) system would be more desirable than a speed density. I know that a late 80's early 90's Chrysler MAF sensor is also a MAP sensor, my old man memory is not sure if GM and Ford also are. The weakness of the early GM ecms was the fuel maps were all in the prom to change one that the self tuning wouldn't correct the prom had to be change. The aftermarket may have had a tuner that with the aid of a laptop could change the maps on the fly...never having been a GM guy I couldn't say. The Fords of the same era had a covered service port on the ecm where aftermarket "tuners" could be attached to modify the fuel and timing maps. The 5.0L Mustang guys were their target costomers