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Thread: Fuel is cut completely at WOT at any given RPM

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Posts: 1-10 of 15
2014-03-09 20:41:13
#1
Fuel is cut completely at WOT at any given RPM
I can pedal it to 95% and still be going, as soon as I put the pedal to the metal and go WOT, the ECU cuts fuel completely. The logs are showing 0 values for the injector latencies and pulsewidths at WOT. It happens anywhere in the rev range, from idle to 5k+. My fuel pressure is a little bit high, (50 psi on a VE) but I wouldn't think this would cause that issue if I can go 95% throttle and not have any issues.

TPS values look fine, MAF is responding... what would cause the ECU to cut fuel completely at WOT?
2014-03-09 20:43:52
#2
sure you are getting 50 psi at wot? sounds like a pump problem dieing
2014-03-09 20:48:14
#3
That's what the gauge is reading when I pull the butterfly to the stop. Dying pump would cause ECU to cut fuel injectors?
2014-03-09 20:49:33
#4
it would cause it to not have enough fuel pressure at that load. you should be seeing more than 50psi at wot. at idle its around 40ish

what ecu?
2014-03-09 20:52:11
#5
I'm getting 40 at idle and a little more than 50 at WOT, what I don't get is why my nismotronic is cutting fuel at WOT... is there some sort of feedback to the ECU for the fuel pressure that I don't know about?
2014-03-09 20:54:19
#6
try to erase the old tune off and put it back on again. and no the ecu doesnt get a signal from the fuel pressure
2014-03-09 21:28:33
#7
tried that, no change. AFRs are going lean at WOT... 20+ complete fuel cut
2014-03-09 22:43:27
#8
you have another pump to try? what pump is in there now?
2014-03-09 22:50:07
#9
Haven't touched it came with car, assuming it's stock. I'll check out what's going on in there but the logs shouldn't be reading 0 for the injector latencies and pulsewidths, if it was the pump I'd think they'd be showing actual #s and the car would gradually go lean not instantly. I got nothing else to go off of though so it'll be the next thing on the list to check
2014-03-09 23:14:16
#10
yeah it almost seems like a computer problem. contact the nistune guys see if they can look at the logs or post them up here maybe that will help
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