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New problem about my 1990 Chevy lumina. Its been getting cold here where i live, and I notice that when I start my car in the morning, it starts perfect every time, but I need to leave it idle for about 20 mins so it doesn't miss while I'm driving. It misses all the time till its warm. I can also feel it miss. The car shakes while going down the road, and acceleration is very very bad. I cant get it to even go 40 mph if i start it right up, and drive it right away. Plugs are new, and plug wires are too. Also is the coil. There is no distributer on this car being that its a 2.5 4 Cyl. I have also had a delay problem as I posted here earlier. Also I have bought a code reader from wall mart for 20 bux, and I plugged it in, and found out that I am getting rich exhaust. Which is triggering the "Check Engine Soon" light almost every time i drive it. The light comes on and a few secs later shuts off. i would like to know how to lean out my fuel to air ratio. Could my missing problem be a faulty plug wire, or a bad plug? I would like to put those 4 prong plugs in my car to increase horsepower. Do they actually increase horse power, or not? Also at my earlier post I have said that my lumina stalls. It doesnt anymore, but it still does delay pretty bad though. Any ideas about whats wrong would be greatly appreciated. Thanks a lot.
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