So, I switched to E85 last fall, drove it for a while and all was fine. I had my alky turned off the whole time, and kept it full so i could use it for mapswitching in case i ever needed to fill up on gasoline.
I switched back to pump gas about a month ago, and the car runs perfect on my old tune, except for the Aquamist HFS-1. First pull, it flows what it should, then teeters off up top. Any pull after that, I get 4/8 bars of flow, and AFR's are 1 point higher on the wideband. I use 50/50 meth/water, 1.0mm jet. Normally I see 6 or 7 out of 8 bars on the flow meter when it is operating correctly. I checked for leaks around the on/off valve, flow sensor, and at the point of injection. I swapped out the nozzle with a .9mm jet, and got consistently only 2 bars out of 8.
I haven't ripped apart the trunk yet to see if there's anythign leaking back there, but I haven't seen any drippage or excessive loss of fluid.
I think it is temperature related, because I was on the dyno recently, and the temps in the dyno bay were ~60-70 degrees F, while normally the car is outside, it is much much colder, anywhere from -10 to +30F. While on the dyno, I got the normal amount of flow I'd expect, right around 6 or 7 bars.
I've 'solved' the power loss associated with this problem (i.e. just running w/o alky, straight pump gas) by installing a BBK
, but for some strange reason I have the urge to turn the alky back on and boost back up
Any ideas?