Fuel Pressure Fluctuates
 

Having a fuel pressure problem where it goes crazy and bounces between 38 and close to 60 psi. Just pulled the AFPR it's an Aeromotive A1000 and it still looks new inside. Checked the return line and nothing blocked it as far as I could see.
Here's the video of what it's doing.
Thanks for all the help so far!

Re: Fuel Pressure Fluctuates
 

Another idea, maybe take off the feed line from the rail and put into a bucket, see if you are getting weird pulses of fuel instead of a constant flow. If you have the time, check another pump.

Re: Fuel Pressure Fluctuates
 

ok. I'll try that now. Thats a good idea.

Re: Fuel Pressure Fluctuates
 

really its not the diaphram?

Re: Fuel Pressure Fluctuates
 

fuel pump is not pulsing

Re: Fuel Pressure Fluctuates
 

Diaphragm?

Re: Fuel Pressure Fluctuates
 

I can take pics but it looks perfect

Re: Fuel Pressure Fluctuates
 

Diaphragm

Re: Fuel Pressure Fluctuates
 

was not wet either on top of it when I took it apart

Re: Fuel Pressure Fluctuates
 

I can blow through my return line no problem and it bubbles the tank. so it's not that

Re: Fuel Pressure Fluctuates
 

must be gauge or something but it does fluctuate the fuel pressure
going to hook the fpr up but not the return line and put that in the bucket to see what happens

Re: Fuel Pressure Fluctuates
 

doesn't pulse or fluctuate

Re: Fuel Pressure Fluctuates
 

Try to use an actual mechanical fuel pressure gauge. The one you are using might not be accurate.

Re: Fuel Pressure Fluctuates
 

it works fine otherwise

Re: Fuel Pressure Fluctuates
 

going to hook it back up and try it again...

Re: Fuel Pressure Fluctuates
 

WORK FINE NOW!! WTF?!?

Re: Fuel Pressure Fluctuates
 

User error FTW!

Re: Fuel Pressure Fluctuates
 

lol. More like cursed garage. Well started and idled fine. I ended up gaining a few in of vac. back when I put the wastegate on that was lost from my over ported flapper and or bigger size hose to gauge. One I had was tiny. Now has a coolant leak from the lower hose. must have a rip in it or something. Will replace it in the morning if oreillys has one or if I can steal the one from Blakes aluminum rad.

Re: Fuel Pressure Fluctuates
 

lol thats what I'm thinking. who cares if it works

Re: Fuel Pressure Fluctuates
 

Your wastegate has no effect to your engine vacuum.