Engine looses power and Back fires
10

Asked by Matthew Jan 18, 2015 at 01:07 PM about the 2002 Chevrolet Silverado 2500HD LS Extended Cab LB 4WD

Question type: Maintenance & Repair

The engine looses power when shifting down a gear on hills, the passenger side exhaust manifold is cherry hot . I changed the fuel pump, filter, EGR valve. Had the codes read and reset , Knock sensor comes up and O2 sensor. Where should I look now?

3 Answers
10

Matthew answered 9 years ago

no I have not replaced the knock sensor yet. The engine does not have any taps that I can hear. Does have an exhaust leak.

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10

Matthew answered 9 years ago

The engine seem to act up when it gets warm. When its cold it runs fine. Not sure what code for knock sensor will check this weekend.

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10

Matthew answered 9 years ago

Ok, I replaced both Knock sensors. The engine light went out but it still has same problem. It seems it runs fine on the flat but when come to hill it losses all power. Back fires. Any help any one. Should I start replacing coils, plugs, wires???

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