B16a2 chugging after 5k
So I got a 99' Si and I notice that any time I get on it past 5k it starts getting chuggy and wont pull at all. I have a aftermarket tach in it and notice that the tach needle starts spiking when it happens. Does not happen with stock tach. Just trying to figure out whats going on. Detonation? Timing issues? Lack of fuel?
Car runs fine everywhere else
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1999 Honda Civic Si
1984 S10 355 small block drag truck
1971 Toyota Pickup Converted 4x4
TR em1 crew #43 
Last edited by Brandon H.; Jul 13, 2011 at 04:45 PM.