AFPR Assembly

[CrisMurfy]

I recently installed an Aeromotive AFPR and have a question about the internal assembly of it...
When you take the regulator apart to change the spring to the stiffer spring for higher psi... There is a washer type thing on the top with a nipple indented on it... I did not see what way it was installeed inside the regulator before it fell out of it.. When re-assembling should the nipple go inside the spring or should the nipple touch the screw on the top? I just would like to make 100% sure I put it back together correctly.

TIA

 

[AutoMods]

Happens to a lot of people, no worries . The nipple should be in the spring side, the indentation on the washer is for the screw.



Richard
ImportEvolution.com

 

[CrisMurfy]

Thank you for your responce. I do have it installed the correct way then.

A problem I am having is with setting the base pressure. I have the stiffer spring installed like the directions say, but it will not allow me to set the pressure at 43psi. I am trying to set it with the motor recently turned on (so that the liquid inside the guage does not heat up and change the reading) and it does not allow me to set the pressure anywhere below 45psi. The screw gets to a point where it seems to not even touch the spring anymore and it wont go any lower than 45.

People on other forums have been trying to help me figure this out, but nothing has worked.

If by some change every once and a while it allows me to set at at 43psi, the next day when I go to check it again it is completely different.

I bought the AFPR and install kit from Import Evolution a few weeks ago. BTW I was VERY impressed by your kit and directions.

Any ideas?

 

[TurboAWDKID]

i have the same kit and i also put in the stiffer spring. i have no problems with adjusting the base pressure at all. i had it set at 35psi, but now i have it set at 46psi, cause i am running 16-18psi currently and i was getting studering at around 6500 rpms at 35psi of bfp. now i have no studering and it pulls great up to redline. the only problem im sure i am having is that i am running rich on my stock injectors. but i rarely hit full boost, unless im at the track or street racing, which i dont do too much now.

 

[larsrya8]

Thank you for your responce. I do have it installed the correct way then.

A problem I am having is with setting the base pressure. I have the stiffer spring installed like the directions say, but it will not allow me to set the pressure at 43psi. I am trying to set it with the motor recently turned on (so that the liquid inside the guage does not heat up and change the reading) and it does not allow me to set the pressure anywhere below 45psi. The screw gets to a point where it seems to not even touch the spring anymore and it wont go any lower than 45.

People on other forums have been trying to help me figure this out, but nothing has worked.

If by some change every once and a while it allows me to set at at 43psi, the next day when I go to check it again it is completely different.

I bought the AFPR and install kit from Import Evolution a few weeks ago. BTW I was VERY impressed by your kit and directions.

Any ideas?

I had a similar problem, except mine would idle at 60 psi. There was a small piece of rust or something blocking the outlet of that white plastic thing on the fuel pump assembly. I had to use a nail and quite a bit of force to get it out, and now i can set my pressure all the way down to 25 psi. I would check for blockages.

Here's the thread I created. There are some diagnostic ideas in there too.

P.S. In the first post, I had that washer installed upside down, which is why I could get my base pressure so high (70+ psi). I fixed that after I took the regulator apart to check for spring binding.

 

[AutoMods]

Make sure your return line is not kinked or bent too severly. You shouldn't have any problem going to 35psi base unless you have a monster fuel pump (much bigger than 255lph or supra) in which case you'd just need to move to a -6 return line.

Spring installation is very easy but just do it slowly and carefully. It's possible that your spring is not laying in the fpr correctly or the washer isn't sitting on the spring correctly. BTW the bevel of the washer should fit the shape of the adjustment bolt (bevel points down) you can tell which way the washer is suppose to go.

Also, I've never heard of this happen before but if you overtighten the vaccuum nipple it could theoretically hit and interfere with the spring but unlikely.

Ryan

 

[CrisMurfy]

I will try everything you all have reccomended as soon as I get a chance this weekend.. Thanks for the quick advice.

If this means anything at all, I'm not sure..

When I have the motor turned OFF, but I run the fuel pump via DSMlink, I can set the fuel pressure anywhere from 35psi and up. It goes down there no problem and seems to work fine. But once I have the car running and I try to set it, it won't go below 45psi. Does that mean anything to anyone to help diagnose??

 

[nitrouskris]

well i run a a1000 fuel pump and i have a stock return line, with no problems for 2 years now.

 

[larsrya8]

When I have the motor turned OFF, but I run the fuel pump via DSMlink, I can set the fuel pressure anywhere from 35psi and up. It goes down there no problem and seems to work fine. But once I have the car running and I try to set it, it won't go below 45psi. Does that mean anything to anyone to help diagnose??

That (to me) implies a blockage, because the pump is flowing more when the car is on (higher voltage) which is causing the AFPR to be overrun. You can try the "hose to a bucket" idea to confirm this.

 

[CrisMurfy]

You guys were right. I did the bucket test. With a new line goin to a bucket I can turn the pressure all the way down to 20psi. So now I have the problem of figureing out what the hell is causing the block.

Any tips on hunting down the problem? Thanks guys.

 

[CrisMurfy]

FIXED!

I went to Napa and bought a 6 foot 3/8" brake line, and 6 feet of 3/8" fuel hose. Ran that from the AFPR to the tank and left the old line disconnected.

12$ and about 1.5 hours of work and it now works perfectly.

Thanks for the advice guys.