Fuel Pressure Problem

[TYTILIDIE]

So I bought an AFPR from a board member here about a month or 2 ago. It looks just like the one RPM sells. I put it on the other day and used my FP gauge to adjust it obviously. The needle was bouncing back and fourth between 42 and 47ish. Either way up or down it seemed to be the same 5psi jump. The gauge was making a funny ticking sound. I put the stock one back on and it was smooth. Put the new one back on and it was the same as before. I took it apart and it appears to be just fine inside. Put it back on and same thing. Anyone ever had this problem and or know what I can do to fix this? I decided to run it and see what it does and it seems to be running just fine.

Mike

 

[Don W.]

Re: Fuel Pressure Problem

Just thinkin' out loud 'cuz I've not seen one apart. But, guessing here,

if the piston has an o-ring make sure the piston slides smothly all the way by itself without the o-ring. Then look very carefully at the o-ring. You should be able to tell if it is "rolled" or twisted. Prolly a good idea to replace it anyway. Just be sure to get the correct size. Using to old one may or may not give you the corect size. Take the whole thing to a good autoparts store and they should be able to sell you the correct one.

 

[TYTILIDIE]

Re: Fuel Pressure Problem

There is no piston, its a diaphragm and it looked perfect. Oh yeah there is a spring too but it looked good as well.

 

[Don W.]

Re: Fuel Pressure Problem

OK, took care of that prob. Didn’t we… Only other thing I can think of is the valve has a piece of crud imbedded in it.

Or, in other words, I tried.:roll: