I have a 91 Z28 with a auto trans. and a 355cid. I have an MSD 6AL box/coil/distributor and Taylor wires. My RPM gauge is shooting around like crazy even though I hold the engine speed steady and the cars running smmoth and constant. Any ideas on whats going on?

 

There is a filter you have to remove thats all i know.

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http://bitchincamaro.no-ip.com 91 RS Camaro 5-speed black w/t-tops 305 TPI
MODS: SLP cold air intake w/K&N, air foil,Accel 19 LB injectors, March aluminum under drive pullies, Alburn pro posi, Aluminum drive shaft, Random Technology 3'' cat-back, 8.5mm MSD wires, 160 thermo, jet fan swich, Custom chip with 91 vette computer, SSBC slotted rotors, optima battery in the rear, BMR adjustable lower control arms and panhard rod, Kenny Brown strut tower brace, TB bypass, no egr, no air

 

Not sure what you mean by filter??? But the car was fine up until last Thursday. Where does the gauge get the signal from??????