Monday, April 10, 2017

Mass Air Flow or Speed Density?

I have a 1988 F150 XLT Lariat with a 351w

From what I ve read, Ford started using MAF in 89. Therefore my truck was made stock with a speed density system.

Here s where it gets tricky and what I don't exactly understand. The engine in it was replaced by the original owner. They replaced the stock 351w with a 351w out of a 1995 E-150. If it's a 1995 it should have a MAF right? It doesn't though. They re still running the stock speed density from what I can tell considering the lack of a MAF sensor.

Did they do it this way so they didn't have to change out the computer? How well does the 1995 engine communicate with the 1988 computer? Should I go ahead and convert it to MAF so the newer engine performs better since that s what it was made with originally? Would I have to change out the computer?

Basically what I Wana know is, did they do it correctly? Or should I convert to MAF for the newer engine?

Any info would be great thanks!

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