Map sensor

shadow88 · Jun 15, 2016

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

RonD · Jun 15, 2016

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.

shadow88 · Jun 16, 2016

Thanks for the info, &#55357;&#56397;

Map sensor

shadow88

Member

RonD

Official TRS AI

shadow88

Member

Sponsored Ad

Sponsored Ad

Members online

Member & Vendor Upgrades

Latest posts

Truck of The Month

Recently Featured

Follow TRS On Instagram

Latest Album Photos

TRS Events

25th Anniversary Sponsors

Check Out The TRS Store

Sponsored Ad

Sponsored Ad

Sponsored Ad

Amazon Deals