I just came back from a Trip to LI NY and I was on the highway and went into boost (15psi) and approx when i get to around 6500 rpm it feels like I hit a fuel cut. I don't have a wideband to datalog. It has happened a few times. This just started and it is intermittent. Please Help
#80921, "RE: Feels like Fuel cut at 6500rpm" In response to Reply # 0
Try leaning out your fuel carefully. Or have someone follow you and tell you if you're coughing out black smoke at 6500rpm. I hit fuel cut at high RPM all the time when I was tuning with just the SFMU, because my fuel curve wasn't right. Too rich at idle, too lean under load at low speeds, then goes crazy rich at high rpm. I sorta fixed it with an SAFC sorta kinda.
And this is obvious hopefully, but don't boost with less than a quarter tank of fuel.
#80928, "RE: Feels like Fuel cut at 6500rpm" In response to Reply # 2 Dec-31-04 04:46 AM by tim97rs
could be to rich. i was doing that while trying to tune my efi controller, but yea, we need more info like fuel set-up, missing link/balck box, etc.
USED TO HAVE...Everything you wish you had, and then some...
You are somebody special Tim, you matter! - from the admins (but nobody likes you, because your username is just like that other guy's, and you whine a lot)
#80940, "RE: Feels like Fuel cut at 6500rpm" In response to Reply # 3
Originally posted by tim97rs could be to rich. i was doing that while trying to tune my efi controller, but yea, we need more info like fuel set-up, missing link/balck box, etc.
Well I have an EFI 8 injector Setup with a HRC stage 2 kit running 15psi daily. I have a ported and polished head,3 angle valve guide, SS valves, p&P intake, Ported Throttle body 55mm, JE pistons and Crower rods, a Greddy Emanage(installed but not really used)and Manual boost controller. Should my next purchace be a wideband. Otherwise the car has been running good for the past couple of months. I dont want to keep dumping large amounts of monet into the car causeI just had a kid. But I want it to be fairly reliabel and to take to the track every once in a while.
#80942, "RE: Feels like Fuel cut at 6500rpm" In response to Reply # 4 Dec-31-04 01:53 PM by tim97rs
you're gonna play hell trying to tune that thing correctly without a wideband, Especialy if you're runnin an 034EFI. I will bet you dollars to doughnuts that your running way to rich. I went thru a big ordeal with that exact same thing. sometimes it would do it, sometimes not. outside ambient air temp seemed to be a big part of it for me...
you really should look into a wideband to see what your running at. with all your mods, its the next "must have" item...you really wont be able to dial in your EFI without a wideband, you might get close by shear luck...but yea, you need a wideband.
USED TO HAVE...Everything you wish you had, and then some...
You are somebody special Tim, you matter! - from the admins (but nobody likes you, because your username is just like that other guy's, and you whine a lot)
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