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Mazda Engine General \  90 b22 fuel filter location?

90 b22 fuel filter location?

Mazda Engine General Mazda Engine Mazda Tech
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following 4
 
skrapinsask   +1y
Well its the carb'd 2.2 engine and from my research i learned it was near the firewall behind the carb. I am still unable to locate the filter. The new one i purchased is an inline type made for the vehicle so i would assume it should be right in the engine bay. If anyone knows the location it would be a great help!

Thanks in advance guys!
mazdatweaker   +1y
If you have an automatic, the filter is located near the gas tank, under the truck.

Otherwise it is located on the passenger inner fender well.
skrapinsask   +1y
right on! thanks for the help! swapped it out in a minute!
immortal1 (linn)   +1y
Good to hear SkrapinSask got things fixed - tweaker is pretty smart when it comes to odd ball things like this.

Ok tweaker - riddle me this, why would Mazda put the fuel filter near the tank on an automatic but on the inner fender well if you have a 5 speed. Just does not seem to make sense. But then again......
hawaiian   +1y
I'm not sure if this contributes to the fuel filter location but the automatics have an in tank fuel pump and manual has a mechanical pump.
mazdatweaker   +1y



Why is a fuel filter located where it is. . . ?

Probably for a couple reasons.

A mechanical pump pulls fuel.

A electric pump pushes fuel.

A mechanical pump generates 3-5 psi.

An electrical pump can generate far more.

A mechanical pump pulls fuel through a filter.

An electrical pump pushes fuel through a filter.

Junk and debris get caught a lot earlier in the line of an electrical pump setup.

I would have said something clever like "The pump creates pulsations that the filter dampens, preventing line resonation" but that wouldn't matter enough to be a universal factor. Other makes, models and manufacturers have the filter in all kinds of weird places.

So maybe Mazda wanted to be like them.
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