Manifold backfire
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Joined: Jun 2009
Posts: 8,025
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From: orangeville ontario
^i agree
if the valve seals where bad you would know it when you fire it up first thing in the morning or after it has sat for a couple of hours. oil would have a chance to drip into the cylinder and would cause the truck to smoke way more than normal when you fire it up and eventually disappear.
if the valve seals where bad you would know it when you fire it up first thing in the morning or after it has sat for a couple of hours. oil would have a chance to drip into the cylinder and would cause the truck to smoke way more than normal when you fire it up and eventually disappear.
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Joined: May 2008
Posts: 18,729
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From: NH
"No I have not replaced the O2 or have I checked the cat" Why?
3gts in 6 miles? Rings and valve seals I'd say, or you forgot to use a gasket for the plenum.
And as Merc said, compression test.
3gts in 6 miles? Rings and valve seals I'd say, or you forgot to use a gasket for the plenum.
And as Merc said, compression test.