Checked the intake air temp sensor readings? My car has similar issues a few times in the past, the first time was the sensor itself, subsequent times the sensor's ground wire had a break in it. When it happened the air temp would go to 100, felt like you'd stomped on the brakes. Steve
I had that issue a few years back; Adding some slack by splicing in some additional wire eliminated the stress on that very light gauge air temp sensor wire and prevented breakage. When the wire breaks, you lose the ground, and the ignition cuts as soon as you hit boost. The original poster's problem seems to occur later though, after he's already in boost. Jerry aka LGO -----Original Message----- From: Stephen Rigley <[email protected]> To: Robert M <[email protected]> Cc: [email protected] Sent: Tue, Aug 3, 2010 9:21 am Subject: Re: 94 FMII Cutting out at high boost/rpm Checked the intake air temp sensor readings? My car has similar issues a few times in the past, the first time was the sensor itself, subsequent times the sensor's ground wire had a break in it. When it happened the air temp would go to 100, felt like you'd stomped on the brakes. Steve On Mon, Aug 2, 2010 at 11:14 PM, Robert M <[email protected]> wrote: 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! _______________________________________________ Miatapower mailing list [email protected] http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower _______________________________________________ iatapower mailing list [email protected] ttp://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower
_______________________________________________ Miatapower mailing list [email protected] http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower
