Soooo I think this aem pump is going out too. This time it might be partly my fault. I took the pump back out to redo the way I had the wiring run through the hanger and my retarted self ******* dropped the pump and hanger on the concrete in my garage! It seemed to work fine for a couple days after that, but now I'm having the exact same leaning out issue up top in boost. Also the pump is making a lot more noise then it did before. I can't ******* believe how retarted I am for dropping it! I mean I'm 99.9% sure that this is a fuel pump issue again, does that sound right to you guys? This is so gay. I'm not sure if I sould just get another aem pump or go with a different one this time...

 

There is a very high possibility you bent or knocked something out of alignment internally when you dropped it. Possibly something as simple as a brush could be out of whack. You could do some testing, but if you have the funds I would just purchase a new pump due to the RPM they run. Even a few thousandths is quite a bit and could potentially be a detrimental issue. **** happens... also for reference:

 

Thanks for the info man. That makes me feel a LITTLE better about dropping more money on fuel pumps lol.

That would also explain why it makes a lot more noise now. Its just about as loud as the walbro was.

 

Ok WTF! I got my other new fuel pump in today and the problem is still there. It just goes way lean up top no matter what.

This is really strange because when I got my first new pump my lean issue was 100% gone. I have multiple logs showing solid afrs to red line. Then I drop that pump on the ground on accident (I'm retarted I know lol) and the lean problem is back. I was sure I broke that pump, but this new one does the same ****.

What I have done this time to try to fix the issue...
-swapped out my oem fpr for my aem adjustable fpr. Still lean.
-checked voltage at fuel pump on both sides of the relay. Good voltage everywhere.
-checked ground wires for fuel pump.
-logs show solid battery voltage.
-full tank of gas
-fuel filter is brand new too

Does anyone have any idea wtf could cause this? I'm not sure what else to check. I mean there's no way I could get 3 bad fuel pumps, nobody is that unlucky lol.

 

Someone just had a problem with their map sensor same issue

Check that

 

I remember that thread. He was having crazy afr problems all over the place. His setting ended up being wrong in his tune if I remember right. My afrs are on target until 6k rpms and 14+psi when it goes lean. I'll double check my setting for the map sensor, but I'm sure it hasn't changed.

 

Final got this issue resolved! I never pulled the oem fuel line off the fuel rail since I bought my swap. Today I was ripping everything apart to figure this **** out. Apparently whoever put the fuel damper back on used the wrong washer on one side. The washer was smashed into the damper causing a serious restriction. Below is a pic of the proper washer. I think this was causing the fuel pressure in the line before it got to the rail to skyrocket making the fuel pump work extremely hard. I have no idea how it was running for so long like that. The fuel pump makes so much less noise now too.

The only shitty part about this is now the fuel pressure at the rail is different and I need to retune my whole fuel map.

 

Damn, well at least you figured it out! But I would be willing to bet you still had fuel pump issues, probably caused by the washer like you said.

 

Wow it was just a mother******* washer?
Damn bro, well makes sense given the issues with the pumps and all. I really hope I don't run into any BS like this on mine xD (knocks on wood)

 

Yeah just a stupid washer lol. Thanks for all the help guys and thanks to the mod that changed the title of this thread to resolved. We need more threads on ht that actually have the answer to the problem. I hate threads that never tell us how it got fixed, no one learns that way.

I spent a little time retuning my fuel map today. It's running better then it ever has and it's nice not having to listen to a fuel pump killing itself while I drive lol.

 

hey bro. I know this is a really old post and my chances of getting a respondes is slim to none.. but I'm having similar issues with my cd5 accord going lean in high rpms in boost. Seems like anything above 10 lbs will spike super lean or anything above 4700 rpms at a certain tps load. But can you explain what washer are you talking about at the feed line? Are you talking about the washer that sits on the fuel rail feed stud? Or is there a washer on the fuel filter ? Or what fuel dampner are you referring to?

 

At the end of the rail opposite of where the fuel enters theres a dampener and a washer attached to the rail. That was his problem

 

Genuine Honda Fuel Pipe Damper Gasket 16705-PD1-003 | eBay

#3 gasket/washer, it is different than the other 3 (#34) 12mm standard washer. It has a star shape in the inside. This must be installed in this location for the fuel dampener to function properly. #2 is the fuel dampener

#3

 

Dumb question, but this little part doesn't apply for aftermarket rail setup or does it?

 

If you're using the OEM fuel pressure dampener or a similar one in design like the Radium yes you need this gasket.