Mechanics

CHEVROLET CHEYENNE ENGINE PROBLEM

1996 Chevrolet Cheyenne • 247,000 miles

I changed out intake manifold gaskets upper and lower
After putting it all back together it idled fine and accellerates fine but under steady load maintaining a steady speed it surges pretty bad. The trouble code I'm getting is 1345 engine po174 and po175. Stft b2s2 & b1s2 lean 99.2%
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January 7, 2013.



You have a vacuum leak somewhere. Go over your work and check all lines

Roy