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Issue with motor slightly cutting out under load


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2004 silverado ss

all stock but with a intake exhaust and hypertech programmer


So I had a 6 hour drive and found about 4 hours into it going uphill the motor seemed to cut out or miss fire or something best way i could describe it is it you left off the gas pedal for a split secot then was right back on it, this would happen going up hills on on long straights where my foot wouldent move all the petal at all. Did not do it all the time, it was here and there. no engine codes. any ideas?

Edited by RustyWCA (see edit history)
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If your getting a maf code it is most likely going bad. That can cause the symptoms you are describing. I would first do the plugs and wires, clean the maf with eletrical cleaner so you dont damage the wires, and clean the throttle body.

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