Certainly fits the issue. How to check? Run it hard with the FP gage in place and see if the behavior is odd under boost when warm?
Not thrilled with the idea of all that additional fuel line in there on the road but don't know what else to do, really.... From: [email protected] To: [email protected]; [email protected] Subject: RE: 94 FMII Cutting out at high boost/rpm Date: Mon, 2 Aug 2010 18:37:45 -0400 Pump slowing up after it’s been running awhile? Larry Alster 91 Miata White Knight 92 Miata Silver Bullet 92 Miata Honey B 04 MSM MX-5 Whooosh 06 WRX STi Subie From: [email protected] [mailto:[email protected]] On Behalf Of Robert M Sent: Monday, August 02, 2010 6:14 PM To: [email protected] Subject: 94 FMII Cutting out at high boost/rpm Greets! My 94 FMII car (installed circa 2000, RC550's, 12psi, BBBT, original fuel pump) is cutting out under high boost/high rpm conditions. I sent a datalog to FM and Jeremy replied, "Your ATS & CTS look fine. You've got plenty of injector on-time. So, if you're leaning out I'd have a look at your fuel pressure to see if your pump is bad or filter is clogged. Should be running around 35 psi at idle & around 45 psi if you pop the vacuum hose off the regulator. In boost it raises pressure 1:1. " I finally checked the pressure today and got 35 idle/44-ish with the vac source removed. Max pressure (checked with the fuel line output blocked) was ~77psi. I did notice that the behavior doesn't start immediately, but rather appears once the car is good and warmed up. What's the next step? I probably am due for a filter, but it seems somewhat unlikely that I'd get good numbers in the garage with a clogged filter, no? All input welcome- thanks in advance!
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