Is the series 4 and 5 fuel pumps interchangeable? Or is there a difference? I want to put a series 5 fuel pump in my 87 series 4.

 

I don't know the difference, but most places I've seen sell separate pumps. Does the 89-91 flow better or something? I've heard good things about the Walbro pump. About as cheap as a stock replacement (not from Mazda though!!)

 

bump

 

what the hell is bumb!!!! and I don't know what the diff is thats real wierd but know one ever said mazda knew what they where doing.

 

bump is to get the post back up top, otherwise no one will read it.

 

hate to bring this back from the dead but i would like an answer to this Question, because i will be soon buying a s4, and i have an s5 pump sitting at my house waiting for it, that is if they are interchangeable.......... do they have diff. flow rates? anyone know?

-Shawn

 

I believe they are the same flow rate, the only difference is that the s4 pump is connected to the hard metal line(the line that acutally comes out off the tank) with a regular hose and clamp, where as the s5 and fd uses a hose with an o-ring. There would be no reason to use the s5 pump, unless your s4 pump was bad.

 

thanks, i just wanted to make sure the pump wouldn't be taking up space in my shed, now that i know it is still usefull incase the s4 pump were to go out

-Shawn

 

It's not a direct drop in, but you can "make it fit".


-Ted