I also sent a message to MAP about the issue. They should specify that the customer also needs to purchase a new filter sock separately.

 

how much noise are you making to get that kind of letter?? You're just replacing the fuel pump.

Did anyone notice that it says that life will be diminished if used with E85?

 

Some pumps need to be primed before they'll flow at pressure. Disconnect the supply line from the pump carrier, run a piece of fuel line from the fitting on the pump carrier to a 1-gallon jug outside the car, and crank the motor until some fuel flows into the jug. The supply fitting on the pump carrier is the one that points towards the passenger side of the car.

 

Yep. I'm not surprised, but disappointed. Not just dimished life, void warranty


Hardly any noise at all. I've been a ninja. I dont even use my electric impact there. It's not about noise, it's the fact that the landlady lives in the building above the garage, is a crazy tightwad, and when she sees the light on in there at night for more than 10 minutes, she comes down and harasses me about how I'm not allowed to work on my car there, only park it. not a single tenant has complained at all. So I blocked out the window with cardboard. She came in while I was gone and took it down before I even tried to work in there at night. She is a kind of senile old lady who hardly speaks English so that makes it impossible to communicate with her. I even pay her $10 extra a month for electricity which I couldn't use if I tried. She took the knob off the sink to keep me from using the water. Still works s a urinal Then she stole all my tools once, claiming she thought they beonged to the previous tenant. Her daughter on the other side of the country wrote a letter saying "The San Francisco Inspection Services prohibits repair work in residential garages. Therefore the request to discontinue work is valid." SHE is the one I specifically told I would do basic work there before I started renting it and said is would be okay. I love this city, but I am sick of this kind of BS all the time. I'm currently looking for a new place to buy a single family home where people will leave me the hell alone to live my harmless life and won't be seen as a menace just for trying to fix my car.

I'll try that. Shouldn't the pump make some noise on acc. power anyway though?

 

As far as I know, the Evo 8/9 ECU does not attempt to prime the pump. The only time I've seen pressure is when starting the engine, and then it cranks it up full power.

 

The Walbros always do, why wouldn't this one? I'm sure you're right, I'm just trying to understand.

 

If you've heard your Walbro do it, then this one should turn on at the same time as well, but it doesn't matter for your situation because as long as the supply line is attached to the pump carrier, there is going to be back pressure on the pump outlet that will keep the pump from priming. Perhaps sitting overnight in your fuel tank might allow fuel to seep into the pump and allow it to prime, but if not try priming the pump as I outlined.

 

Exactly what I was thinking, hope it isn't too good to be true.

 

On what gas are you guys thinking about? You sure that hp rating isn't for an n/a car?

This will not support 1000hp on an evo

 

Finally got my *** into gear and off the mountain and got the car running again today. The AEM does seem to operate significantly quieter than the Walbro did. It also does not make the "priming sound" when the ignition acc. power is turned on typical to Walbros. The car is running a bit funky under even light load and boost, probably due to the old E85 having sat too long.

I just secured a new, better garage finally so I guess I'll be draining the tank and putting in new fuel. And we all lived happily ever after. As long as you rmember to buy a new filter sock

 

So I now have a problem, again...

Interesting anecdote: a fuel sock from a 92-94 2.4 4Runner fits our fuel pumps in a pinch. I had to find this out the very hard way after my car died again and I found the sock to be filthy but dealerships were closed and I was very far from home.

I didn't want to jack this thread but I thought I had it solved and it was running well but now I am dealing with this reappearing problem still.

Here's the whole story:
Without changing any of the wiring after the hard wire I got it working again with the new AEM 320lph fuel pump.
After my first E85 tune from Sean @ FFTEC I hard wired the fuel pump to solve a lean spot from dropping voltage and had Sean re-tune it. Right after my last tune from Sean, it died a few blocks away and wouldn't start, then mysteriously started again 30 minutes later. It happened again a week later and would not start at all so I towed it home.

I thought the Walbro might be dead, and replaced it with a new AEM 320lph pump. The AEM came with a fuel sock that didn't fit in the carrier housing so I had to re-use the old one for lack of a better solution at the time. It looked used but not bad for short term to see if the car would run again. I got it running again and it was running great until last week. On the highway, rolling on with heavier load, (like in 5th rolling on throttle from 2900rpm+) it wouldn't boost, would buck, and the AFR went very lean, all the way to 22 very quickly.

Last weekend my truck was in the shop so I drove the Evo very gently and after filling up on E85, it died 10 feet from the pump and wouldn't start again. I pulled out the fuel pump again and the sock was absolutely filthy, almost black. None of the "E85 goo" you read and hear about though. I thought this may be causing fuel starvation. I couldn't get a replacement sock again so I found one that fit from a 92-95 4runner. It still won't turn on and it seems like the fuel pump isn't getting power. Maybe the dirty sock caused too much of a restriction for the fuel pump and burned it out? I don't know, it doesn't seem likely. I am also surprised my fuel sock got SO much dirtier so quickly.

All of the these problems began after hard wiring the pump. I have checked and re-checked the wiring and the relay seems to be fine, but I can't figure it out.

I have not re-tuned for E70 but I am not sure if thats the problem. I stupidly havent been testing my E85 either. I wouldn't ben surprised if this were the problem. Flame on... I deserve it

Pics coming soon

 

Updates?

 

The AEM pump is dead already. It lasted me somewhere between 500-1000miles, all on on E85. I'm not sure why I am burning out fuel pumps like this. 30psi on the stock 9.8cm turbo should not be causing these to fail but I don't know what is. Electrical issue? Poor grounding? Bad fuel?

I need a rock solid replacement pump ASAP, but am not really interested in another punched Walbro 255 and obviously this AEM didn't last any longer.

Suggestions?

 

Wow.. I have 3,000 miles on mine. 27psi on a red . No problems but I'm running 93.

 

Here is what my fuel sock/pump pre-filter looked like:



Cut open


Note there are some tiny fine metallic/mica looking particles on it. I have not inspected them under a magnifying glass yet or with a magnet but I plan to. It was a little discolored before I ran the AEM pump, but turned this dark gray color within 500-1000 miles of E85 after the AEM install. Could be a coincidence, or maybe not. Eithr way at this point I don't feel I can recommend this pump for E85, although it really shouldn't mater.

I am not saying the AEM pump caused this necessarily. I may have just gotten some really poor fuel from a filthy tank.

Here's the Napa part number for the replacement 4Runner sock. Note: I only used and am showing this for reference in case you need one in a pinch like I did, as I'm sure its easier to get from a regular store anywhere. Obviously the OEM one is a better idea.


Fits the pump


Fits under the carrier assembly cap with a tiny stretch of the cap