FiTech EFI Tuning Forum

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Hesitation/Sputtering on Acceleration

Ok, here is something everyone should check if they are having issues with hesitation, sputtering, etc. on acceleration after slowing and or upon acceleration after coming to a complete stop. This is not for a distributor-less system. This is for those who are running an ignition system with a distributor but without points.

Check the voltage on the positive terminal of your coil while the engine is running.  If you have a ballast resistor, the voltage could be reduced by the ballast resistor to as low as 5v which will affect the output of the coil and not giving you the spark you need and potentially causing your hesitation when accelerating from a stop or after slowing, this was my problem.

The ballast resistor is there to reduce the voltage when the car is running to reduce the wear on and lengthen the life of the coil and points.  But if you’ve removed the points and installed a Pertronix style electronic module then you really don’t need the ballast resistor.

I learned this by watching an episode of Roadkill Garage and removed mine, hesitation gone.   Engine is running better than it ever has now!!!

I hope this helps someone out there who is frustrated and has tried everything else.

Have a blessed day!!