Question about 1997 Chevrolet K1500

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I have 1997 Silverado 5.7 miss on #5 when under load take your foot off wait put your foot backin and it will run fine did all the wires plugs cap rotar same miss more so on uphill what do think is wrong?

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If you have isolated to one cylinder, you need to look at the compression on that cylinder, should be at lease 110psi. Also check the valve springs, a broken spring will allow engine to run smooth unloaded and miss under load. Remove valve cover and push down on valves, if they move at all the spring is bad. You can also do a cylinder leakdown test and it will tell you if you have a valve or rings going bad.

Posted on Apr 26, 2010

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