razorlab's simple build(s)
Nov 30, 2013, 01:03 PM
#62
Its probably fuel tank pressure for EVAP system operation just like for the Evo 8/9. Here is what I built to measure pressure at the pump.
https://www.evolutionm.net/forums/ev...l#post10114095
I "logged" the pump pressure by making a video of the mechanical gauge while shouting the rpm.
Anyhow, now that I think about it, you'd probably be better off logging fuel rail pressure. That would be the easiest way to see if the pump is able to supply the necessary pressure at the rail where it counts. Probably the easiest way to do that would be to tee into that hose where the fuel filter is located. Put the tee after the fuel filter, and then tape the gauge to your window. The hose from the tee to the gauge can be very small diameter, so it should be possible to run it out from under the hood. You'd need a 100 psi gauge.
https://www.evolutionm.net/forums/ev...l#post10114095
I "logged" the pump pressure by making a video of the mechanical gauge while shouting the rpm.
Anyhow, now that I think about it, you'd probably be better off logging fuel rail pressure. That would be the easiest way to see if the pump is able to supply the necessary pressure at the rail where it counts. Probably the easiest way to do that would be to tee into that hose where the fuel filter is located. Put the tee after the fuel filter, and then tape the gauge to your window. The hose from the tee to the gauge can be very small diameter, so it should be possible to run it out from under the hood. You'd need a 100 psi gauge.
EDIT: Nevermind, I should have kept reading the thread.
Last edited by razorlab; Nov 30, 2013 at 01:05 PM.
Dec 6, 2013, 07:28 PM
#65
Some of the early E85 testers had issues with the sock and E85. Just a guess in this situation though. You checked the obvious relay issue I hope.... Fuel pump at a lower voltage will do that too. I'd shake your fuel pump relay before tearing anything apart.
Dec 7, 2013, 04:14 PM
#66
I'm going to guess that you have debris which got past your sock filter or the sock filter itself has got "sucked in" slightly to the pickup.
Some of the early E85 testers had issues with the sock and E85. Just a guess in this situation though. You checked the obvious relay issue I hope.... Fuel pump at a lower voltage will do that too. I'd shake your fuel pump relay before tearing anything apart.
Some of the early E85 testers had issues with the sock and E85. Just a guess in this situation though. You checked the obvious relay issue I hope.... Fuel pump at a lower voltage will do that too. I'd shake your fuel pump relay before tearing anything apart.
I have to doubt debris as I converted the car to E85 at 950 miles, but I guess maybe their *could* be something in there.
Relays are upgraded to newer.
Fuel sock is E85 safe and looks fine.
Still trying to figure out what would be the culprit...
Dec 8, 2013, 09:08 PM
#67
OK, I'm starting to see inconsistent AFR's at WOT now. Sometimes it hits 11.8, sometimes it's 12.6, today I saw a 13.2 before I let off, then it hit 12.0 the next WOT application... ugh...
Now I'm starting to think the pump is wacked....
Now I'm starting to think the pump is wacked....
Dec 9, 2013, 07:41 AM
#69
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Im having the same problem and also down in power... after the tune, I was 11.1-11.3 at wot then all of a sudden, I see 11.8-12.4. Im running dw65c and id1000inj. Im hoping my problem isnt the injectors..
Dec 20, 2013, 07:53 PM
#70
Ok an update on this build.
I hate hate hate hate hate these springs. I'm not really sure why they get such great reviews. It's SOOOOO underdamped with the OEM struts, even with Bilsteins. It's horrible. Seriously I think most people that give these good reviews haven't actually had good suspension setups.
Honestly I think stock is better.
So, now to find something that doesn't suck and isn't a billion dollars.
My fueling issues I'm going to tackle after the holidays...I'm off to New Jersey for a week...
I hate hate hate hate hate these springs. I'm not really sure why they get such great reviews. It's SOOOOO underdamped with the OEM struts, even with Bilsteins. It's horrible. Seriously I think most people that give these good reviews haven't actually had good suspension setups.
Honestly I think stock is better.
So, now to find something that doesn't suck and isn't a billion dollars.
My fueling issues I'm going to tackle after the holidays...I'm off to New Jersey for a week...
Jan 6, 2014, 09:59 AM
#71
Ok an update on this build.
I hate hate hate hate hate these springs. I'm not really sure why they get such great reviews. It's SOOOOO underdamped with the OEM struts, even with Bilsteins. It's horrible. Seriously I think most people that give these good reviews haven't actually had good suspension setups.
Honestly I think stock is better.
So, now to find something that doesn't suck and isn't a billion dollars.
My fueling issues I'm going to tackle after the holidays...I'm off to New Jersey for a week...
I hate hate hate hate hate these springs. I'm not really sure why they get such great reviews. It's SOOOOO underdamped with the OEM struts, even with Bilsteins. It's horrible. Seriously I think most people that give these good reviews haven't actually had good suspension setups.
Honestly I think stock is better.
So, now to find something that doesn't suck and isn't a billion dollars.
My fueling issues I'm going to tackle after the holidays...I'm off to New Jersey for a week...
Jan 6, 2014, 10:11 AM
#72
Ok an update on this build.
I hate hate hate hate hate these springs. I'm not really sure why they get such great reviews. It's SOOOOO underdamped with the OEM struts, even with Bilsteins. It's horrible. Seriously I think most people that give these good reviews haven't actually had good suspension setups.
Honestly I think stock is better.
So, now to find something that doesn't suck and isn't a billion dollars.
My fueling issues I'm going to tackle after the holidays...I'm off to New Jersey for a week...
I hate hate hate hate hate these springs. I'm not really sure why they get such great reviews. It's SOOOOO underdamped with the OEM struts, even with Bilsteins. It's horrible. Seriously I think most people that give these good reviews haven't actually had good suspension setups.
Honestly I think stock is better.
So, now to find something that doesn't suck and isn't a billion dollars.
My fueling issues I'm going to tackle after the holidays...I'm off to New Jersey for a week...
