94GTPRO5.0

Can anyone tell me if a fuel filter on backwards will cause the fuel to not flow right and/or cause a car not to idle or even run like should? [sm=headbang.gif]

Maxwelhse

I can tell you that every fuel filter I've ever seen has an arrow on it to indicate which way it should be put on. I've never put one on backward, so I don't know. Get under the car and look for the arrow.

nseoi

just crawl under the car and flip it if you are so doubtful, its not hard, i dont think i even used lots of tools, just a pair of pliers

Gronk72

To answer your original question, Yes a 5.0 will run with the fuelfilter installed backwards just fine. But the filter will not filter worth a darn., meaning you coulad be getting all sorts of junk from the tank up into the lines and so on. If theres any doubt you better check it .

ACE

You know on my mark viii it is impossible to put the filter on wrong because of the bracketry and the filter has 2 different size hoses at each end.

Gronk72

Unfortunatly the same does not hold true for Mustangs.

94GTPRO5.0

so what way should the arrow point to (Driver side/ or pass)?

Gronk72

The arrow should point inline with the direction of fuel flow from the tank to the engine.