shadow88
Well-Known Member
I noticed my map sensor dose not have a vacuum line hooked up to it, should it? My 4.0 came from a 91 explorer, it seems to run fine, just wondering if I should run a vacuum line to it
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Map sensor
- Thread starter shadow88
- Start date
No
4.0l engines were first used in 1990, so all their computers use MAF(mass air flow) sensor to calculate air/fuel mix on the fly.
MAP(manifold absolute pressure) sensor was used on earlier engines and computers to calculate air/fuel mix, these were also called Speed Density systems.
You could probably sell it
, new Motorcraft MAP sensor goes for $125
MAF system can adjust to changes in the engine.
MAP system couldn't, it just ran pre-set air/fuel mixes from a table in memory.
4.0l engines were first used in 1990, so all their computers use MAF(mass air flow) sensor to calculate air/fuel mix on the fly.
MAP(manifold absolute pressure) sensor was used on earlier engines and computers to calculate air/fuel mix, these were also called Speed Density systems.
You could probably sell it
, new Motorcraft MAP sensor goes for $125MAF system can adjust to changes in the engine.
MAP system couldn't, it just ran pre-set air/fuel mixes from a table in memory.
shadow88
Well-Known Member
Thanks for the info, ��
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