it's an 89 GTA 350 TPI. Last year before i stored the car for winter, it started running rough, so i parked it and thought of fixing it in spring since i did'nt think it was anything serious. This spring, i looked at it and could'nt figure out what was wrong. It's running kinda rough while driving like if i had a blown spark plug wire. When i hit 60 kmh, it shifts in 4th gears, at low rpm, the car shakes. I changed the whole ignition, plugs, wires, ignition coil, pickup coil, eprom, comp, cap, rotor, EGR valve, and still runs the same. At idle it sounds like it spits a little at the exhaust in the back. I'm thinking a vacuum leak at the plenum but the shop checked for leaks and did'nt find any. I did cut out the screens on my MAFS. I was told it might be that.
Any ideas?
Any ideas?
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