I have an AFPR on order, I should be able to get it installed next weekend. I will see if it helps the problem and report back.
Thanks everyone for your input. Graham On Mon, Apr 2, 2012 at 7:40 AM, Eric Schieb <[email protected]> wrote: > The gauge pressure number 75 is indeed 27% higher than 59. But, unless I > did the math wrong, the theoretical flow change through the orifice will be > under 13%. > > Eric Schieb > > On 4/1/2012 11:40 PM, XXXXXXXXXX wrote: > > 75 psi is actually 27% higher than 59 psi. > > XXXXXXXX > > > On Apr 1, 2012, at 8:25 PM, Eric Schieb <[email protected]> wrote: > > FWIW, 59 to 75psi would theoretically be a 13% increase in fueling. > That is assuming the injectors can open similarly with the higher > pressure. At starting (low battery voltage), injectors tend to have a > harder time opening. Higher pressure exaggerates this. Hot injectors are > likely to further exaggerate this. Hoping fuel pressure will fix this > issue may be a reach but worth a shot. > > Eric Schieb > > On 4/1/2012 7:35 PM, Bill Cardell wrote: > > If you're running stock ecu and injectors it won't be happy with 75 psi. > Stock is 59 psi. > > Bill Cardell > Owner, Flyin' Miata > Www.flyinmiata.com <http://www.flyinmiata.com/> > 1-800-FLY-MX5s > 970-464-5600 > > > On Apr 1, 2012, at 4:06 PM, "fast G" <[email protected]> wrote: > > I checked the fuel pressure as it leave the tank, it's 75psi will a > running engine. I have not been able to re-create the hot start issue, the > car is still up on saw horses, but I should have it back on the ground next > weekend. I was kinda hoping that the fuel pressure would be low as it would > give me something to fix. What would be your best guess? > > Graham > > On Sun, Apr 1, 2012 at 6:05 PM, fast G <[email protected]> wrote: > > > > On Tue, Mar 27, 2012 at 2:27 PM, Ken Bogart <[email protected]> wrote: > > I would plumb one inline on the hose going to the fuel rail. > > First determine if your tank is venting by checking gas cap. I would > release the pressure and see if it starts. Is it under pressure or vacuum? > > Ken Bogart > ----------------------------------------------------- > 96 Montego Blue FFS Coldside (His) > 97 Black & Tan (Hers) > 90 Crystal White (sons) > ------------------------------------------------------ > http://www.miatacare.com > http://www.cincimiata.com > MiataMail.com <http://miatamail.com/> list owner > > > On Tue, Mar 27, 2012 at 3:24 PM, fast G <[email protected]> wrote: > > > > I am not sure that I have any FPR at all. I can see nothing in the tank > apart from the pump. It should be running again this week. What is the > simplest way to get a fuel pressure gauge into the fuel line? > > Graham > > > On Tue, Mar 27, 2012 at 2:10 PM, Ken Bogart <[email protected]> wrote: > > Have you checked fuel pressure under the running, hot and not so hot > conditions? > > The NB has a returnless system, the FPR is essentially on the fuel pump > end. The dampener is supposed to accommodate pulsations, but does not > control pressure. > > What if you loosen gas cap? does it suck or blow under this condition? > > Ken Bogart > ----------------------------------------------------- > 96 Montego Blue FFS Coldside (His) > 97 Black & Tan (Hers) > 90 Crystal White (sons) > ------------------------------------------------------ > http://www.miatacare.com > http://www.cincimiata.com > MiataMail.com <http://miatamail.com/> list owner > > > On Tue, Mar 27, 2012 at 2:59 PM, Helsel, Walt <[email protected]> wrote: > > Good, someone that knows what they are talking about. J > > > > (I haven’t looked under the hood of a Miata in 11 months, and last time I > did it had a half finished V8 in there… ) > > > > Wallyman > > > > *From:* Bill Cardell [mailto:[email protected]] > *Sent:* Tuesday, March 27, 2012 2:55 PM > *To:* Helsel, Walt > *Cc:* fast G; [email protected] > *Subject:* Re: Miata based Lotus 7 > > > > More likely it's an nb pulse damper, which is the same footprint. > > Bill Cardell > > Owner, Flyin' Miata > > Www.flyinmiata.com <http://www.flyinmiata.com/> > > 1-800-FLY-MX5s > > 970-464-5600 > > > > > On Mar 27, 2012, at 12:13 PM, "Helsel, Walt" <[email protected]> wrote: > > Your “surge unit” in photo 3 sure looks like a stock Miata Fuel Pressure > Regulator to me… > > > > Wallyman > > > > > > > > *From:* [email protected] > [mailto:[email protected]] *On Behalf Of *fast G > *Sent:* Tuesday, March 27, 2012 1:16 PM > *To:* [email protected] > *Subject:* Miata based Lotus 7 > > > > I am hoping you guys can help me because I am really confused. > > > > I have a Miata powered Locost 7 based on a 2002 1.8 Miata (return less > injection). The car has a hot start issue, it runs well, if I switch it off > it re-starts fine. If I switch it all and wait 5 mins it will not restart > until it cools down, say 20 mins. I got the car built so I do not > understand why the fuel system is plumbed the way it is. But to me it looks > totally wrong. To me it looks like the feed line goes to the fuel surge > unit, the return line goes to the evaporator canister, and the vent line is > just vented to the atmosphere. I am not sure I have a fuel pressure > regulator at all. > > > > The first picture is of the tank > > > > > http://s562.photobucket.com/albums/ss63/fastgxc/?action=view¤t=2012-03-24115835.jpg > > > > The hose at 2 o'clock goes to the evaporation canister. 4 o'clock is the > fuel feed. 9 o'clock in a vent line, just vented to atmosphere. > > > > Picture 2 is the evaporation canister were the 2 o'clock hose goes. > > > > > http://s562.photobucket.com/albums/ss63/fastgxc/?action=view¤t=2012-03-24115905.jpg > > > > Picture 3 is the surge unit.were the 4 o'clock hose goes > > > > > http://s562.photobucket.com/albums/ss63/fastgxc/?action=view¤t=2012-03-24115921.jpg > > > > So I am thinking that I don't actually have a fuel pressure regulator at > all. > > > > I am looking for a plan of action to work all this out. > > > > What do you think? > > > > Graham > > > > > > This e-mail and any attachments contain URS Corporation confidential > information that may be proprietary or privileged. If you receive this > message in error or are not the intended recipient, you should not retain, > distribute, disclose or use any of this information and you should destroy > the e-mail and any attachments or copies. > > _______________________________________________ > Miatapower mailing list > [email protected] > http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower > > > _______________________________________________ > Miatapower mailing list > [email protected] > http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower > > > > > > _______________________________________________ > Miatapower mailing list > [email protected] > http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower > > > > > _______________________________________________ > Miatapower mailing list > [email protected] > http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower > > > > _______________________________________________ > Miatapower mailing > [email protected]http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower > > > _______________________________________________ > Miatapower mailing list > [email protected] > http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower > > > > _______________________________________________ > Miatapower mailing list > [email protected] > http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower > >
_______________________________________________ Miatapower mailing list [email protected] http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower
