rochester 4bbl when you open it up or drive steady, it makes this sound poof poof and bogs a little, i dont recall this doing it before i installed headers, timing is right, i just replaced a faulty TPS no check engine light, it has ***** but it goes poof poof, using the 4bbl or just the 2bbl

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86 Camaro with 88 305 LB9 using 86 carb setup, edelbrock performer manifold, 305 S/R Torquer Heads, Hedman Headers, Crane Compucam 2032 edelbrock cat-back, gutted cat, slp underdrive pulley, mallory ignition, 305 h.o dual snorkel air cleaner, hypertech thermomaster chip,160 degree thermostat, 5-speed, 3.23 posi

95 Beretta Z26, 3100 V6, 4 Speed auto, stock

 

Exhaust leaks can drive the ECM nuts, expecially it they're on the driver's side header where the O2 sensor is.

Burnt plug wires (leaning against the header) can also cause problems like this.

Is the EGR and other emissions stuff hooked up correctly? Getting vacuum lines messed up can cause drivability problems, too.