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Low compression prblem
Alright I have a 1992 Lumina Z34 thats been running rough for a little while, me and my dad replaced the motor about 8 months ago. It was running fine for a little while then started running rough. When the car is cold, I have to feather the gas to keep it from dieing. Also when it is cold when I try to accelerate is lags real bad, then all of a sudden just takes off. I got new plugs and wires on the car and when I did a compression check all of them came up 160 except for the #5 cylinder which bounced around. I tested the #5 a bunch of times and got a range from 15 - 90 and I got 180 on it 1 time. 60 was the average. Does anyone know what would make the compression jump around like that for that cyclinder? Also when I rev in park I cant get past 3300 RPMs just bounced off. Any information would be greatly appreciated. Thanks
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