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Runs rough

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farmlife
New User

Jun 8, 2011, 4:39 PM

Post #1 of 1 (1670 views)
Runs rough Sign In
+Have a 1994 Chevy Silverado 2500HD with 454 eng. and auto trans. On start-up, it runs fine but when it gets to 180 degrees, it starts running rough and the check eng. light comes on. It is showing a 42 and 43 code. In the past 2000 miles I have put in new plugs, plug wires, timing chain and gears, ign. module, rotor, and dist. cap. Trk has 117,000 miles on it. Ideas?? Thanks.





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