Midrange hiccup with 478 +2 Stroker Harley injectors

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riverat1540 · #1 Post by **riverat1540** » Thu May 15, 2014 12:47 am

I've just recently completed the rebuild of this motor, everything seems great with great throttle response until it hiccups through the midrange. To me it feels like a loss of fuel and then it kicks in when you get past it and the top end is great as well, I don't think it's the maps because I have tried a few different ones that I have. Just looking for some input on what it may be..

riverat1540 · #2 Post by **riverat1540** » Thu May 15, 2014 3:49 pm

I would best describe it as feeling like the kill switch is being pressed for a second then it picks back up and it's fine through the rest of the throttle travel

wistech · #3 Post by **wistech** » Thu May 15, 2014 7:06 pm

Hook up the D@M and slowly move the throttle from idle to full and watch the TPS readings (engine off). If they flutter at all the TPS may have a dead spot in it.

riverat1540 · #4 Post by **riverat1540** » Thu May 15, 2014 10:30 pm

Thanks John, I did another throttle calibration and it is fixed