S-10 & Blazer 1982-2005
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Engine miss with A/C on

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Old July 14th, 2017, 10:06 PM
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Default Engine miss with A/C on

1993 S10 2.8 v6 5 spd. A?C I bought this truck 6 months ago and have been working through misc small issues. I've replaced plugs & wires, rotor & cap, ignition coil, egr valve and iac valve, and fuel filter. When A/C is on the engine misses at speed but not at idle, when A/C is off, engine pulls strong, no missing, no fuel starvation. Could this be a bad battery, alternator, or bad connection or ground? Had vacuum leaks and I think I got all of those. How to test when only happens when at speed?
Old July 15th, 2017, 10:18 PM
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I'd think this is a low horsepower issue, do a compression test




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