Needing help with electmotive fi

[Paul Chandler]

I have a 72 pantera with a 351 Cleveland with electromotive fuel injection . The problem we r having is at 4800 rpm the car goes lean and falls on its face ( at 4800 not about). The car is not running out of fuel or loosing fuel psi but if u let off the gas alittle the car will start pulling . We have set the UAP way bigger than it is suppose to be and have added 50% fuel in the correction table and nothing makes any sufferance good or bad. Some info on motor is cam is 252 264@ .050 106 lsa, twm individual tb, old c3 heads, 65# injector, Waldron 255 fuel pump, 180 degree headers. Drive ability and ideal is good just wide open throttle is prob. Don't know if cam could be some of it or what just needing some different opp. Thanks

[MrForce]

Not a system I sell or support, but have you checked the rev limiter settings. There is typically one for fuel and one for spark. Are you checking fuel pressure at speed/under load or just winging in neutral. There is a big difference in fuel demand. Wht is the duty cycle of the injectors when this happens? Are you datalogging? Are the RPM's steady right up to where you are having the problem or do you see rpm scatter? If so, you may have RF/EMI issues (likely) or crank trigger wobble or air gap issues (less likely). You have 800 HP worth of injectors and +/- 600 HP fuel pump, I doubt the fuel system is the problem unless your pump is headed south (it would be noisy) or you have a restriction somewhere.

I have not tuned an Electromotive system in over 10 years, if any of the above doesn't make sense, don't call me, call your dealer or them directly.

Rob

[Paul Chandler]

Fuel psi is checked under load and not mOving off of 43psi, rpm r steady not jumping around, pulse width when the problem begins is about 40% and we r data logging. This mor we got some vid looking down the tb at wot and the injector r pulsing long and slow( u can count the pulses in real time on the video) way over my head here but the fuel should look like a steady flow of fuel from the injectors? wondering if ECM needs to get sent to electmotive ?