AFPR help.

[jacobbyrd]

I just finished installing my AEM AFPR, which I got along with the install kit from MAPerformance.

When I started the car, I went to go and adjust the pressure, and as I took the vacuum line off the AFPR, I noticed that the gauge was reading my pressure a little over 50 PSI. I went to rotate the screw up top counter clockwise, and soon realized that no matter how I adjust that screw, the pressure remains constant, around 51 PSI. The only time the gauge moved was when I hooked the vacuum back up, and pulled the throttle, and noticed that it dropped to the upper 40s, but only with throttle.

I triple checked all vacuum lines, and my installation.

What gives?

 

[Absit]

Possibly a bad regulator, assuming you're adjusting it properly and it's installed properly.

 

[jacobbyrd]

Any other ideas? If it's bad it's bad, but I'm not gonna give up trying too quick. Also, would it be safe to drive home like that?

 

[Absit]

Sure, you'll just run rich. If you can keep it running for a short trip don't worry about it. Worst case scenario you foul plugs and O2 sensor.

 

[jacobbyrd]

alright. Drove it home fine. I just adjusted the global fuel settings on ecmlink to compensate so it wouldn't run entirely too rich...

I've asked several opinions, and keep getting different responses.
So far I've came up with:

1. bad AFPR
2. Insufficient fuel return line
3. I need to try alternate ways to ghetto-adjust the AFPR
4. I just suck at installing AFPRs (not likely the case had a mechanic look it over too)

Any other ideas, or theories to support one over another?

Problem solved. (See below)

Just though I would post the solution since nobody on here was able to help just in case someone else runs into the same problem.

I turned the car into the "on"position, but didn't start the car. I hooked my laptop up and connected via ECMlink. I went to the MISC tab, and checked the box turn fuel pump on. The car was off, but the fuel pump was on, and the guage by the AFPR was reading in the low 30s. I was able to adjust it with the car off, I set it to 43.5, and adjusted the global fuel trims accordingly with ECMlink with the car still off. I cranked the car and let it idle. I looked at the guage on the AFPR, with the car running, it was back to reading a good 50+ PSI, but then I went to look at my AFRs on my wideband, and they were closer to 14.7:1. I drove it down the road cruising, and my front o2 started cycling again. Getting much better gas mileage now and am very happy that I didn't have to send the part back.

BTW, I found this solution from some very helpful people over at dsm-addiction.com if you guys want to check that site out to. Not nearly as many members as dsmtuners but they are very knowledgable and helpful.