It's probably that high because of the fuel pump that has been installed, So I can swap pump or add a AFPR, I don't really see a difference between the 2 solutions, but the AFPR is much easier to install than swapping pumps.
But I still don't understand how the extra fuel pressure is screwing up the hot start. Graham On Sun, Apr 1, 2012 at 7:44 PM, Larry Alster <[email protected]> wrote: > If it were my car I'd want to know why it was too high and fix that rather > than throw a band aid on the problem with a AFPR**** > > ** ** > > JMHO**** > > ** ** > > ** ** > > ** ** > > ** ** > > Larry Alster**** > > ** ** > > 91 Miata White Knight**** > > 92 Miata Silver Bullet (Sold but not forgotten)**** > > 92 Miata Honey B**** > > 04 MSM MX-5 Whooosh**** > > 06 WRX STi Subie**** > > 08 Z06 Corvette (As yet unnamed)**** > > ** ** > > *From:* [email protected] [mailto: > [email protected]] *On Behalf Of *fast G > *Sent:* Sunday, April 01, 2012 8:42 PM > *To:* Bill Cardell > *Cc:* [email protected] > > *Subject:* Re: Miata based Lotus 7**** > > ** ** > > It does have the stock ECU and injectors. But how would the excessive > pressure screw up the hot start?**** > > ** ** > > So you think I should get an adjustable Fuel Pressure regulator so I can > get it back down to 59?**** > > ** ** > > Graham **** > > ** ** > > On Sun, Apr 1, 2012 at 7:35 PM, Bill Cardell <[email protected]> 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**** > > 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 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 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**** > > 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**** > > ** ** >
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