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What will make your 96 suburban idle rough and popping noise from tailpipe?
Wiki User
∙ 12y ago
Possibly the fuel mixture is too "rich" or has too much gas in the fuel to air ratio.
This would make it idle rough or fast and the popping noise could be the unburned fuel igniting in the exhaust system on the hotter than normal exhaust manifold.
One check is after the engine has been running for a while check out the exhaust manifold to see if it is glowing red (best observed in the dark of night) this is a good indication of a over rich fuel to air ratio, and is not good for the engine.
This engine would need the fuel to air ratio corrected by a qualified mechanic.
Wiki User
∙ 12y ago
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