Truck Smoking on Deceleration?? HELP!!!!
#1
Truck Smoking on Deceleration?? HELP!!!!
Hey guys,
Im posting this for a friend. He has the same truck as me but its a 97: Dakota with the 318 v8.
He removed his catlytic converter and his truck now smokes (out of the tailpipe) on deceleration only. The color of the smoke is a bluish gray color. It doesnt smoke any other time, only during deceleration or downshifting.
One mechanic told him it was only because he removed the cat and that it was normal.
Another one just told him he had bad rings.
Any ideas?? Any help will be appreciated.
Im posting this for a friend. He has the same truck as me but its a 97: Dakota with the 318 v8.
He removed his catlytic converter and his truck now smokes (out of the tailpipe) on deceleration only. The color of the smoke is a bluish gray color. It doesnt smoke any other time, only during deceleration or downshifting.
One mechanic told him it was only because he removed the cat and that it was normal.
Another one just told him he had bad rings.
Any ideas?? Any help will be appreciated.
#3
I forgot to add..its only got 76K miles..low miles which is weird. It was running like crap and his cat converter was all broken up inside. So his mechanic said to gut the cat to make it run better. It helped a little then the crappy performace eventually went away. He assumed it was just bad gas. Now that the cat is out it smokes on decel.
#4
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#7
cel should be because of the gutted cat, look under the 2nd gen forum up top at the stick CEL and it should tell you how to retrieve that code from the truck and will define the code for you. oil in the intake can mean a bad pcv valve allowing a lot of crankcase blow by oil into the intake manifold. o and if any mechanic erases a CEL without ercording what the code was, shouldnt touch a vehicle IMO... thats very negligent of a problem.
Last edited by f0x672; 10-26-2008 at 07:04 PM.
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#8
#9
Blue smoke on decel. usually indicates bad valve stem seals. Could be easy fix if you can charge each cyl with air, depress valve spring to remnove keepers, remove spring and replace the seal. Would be easier to replace with heads removed, though. And if you are going to the trouble to remove heads, might as well build heads.
If it was the rings, it would smoke blue all the time.
If it was the rings, it would smoke blue all the time.
Last edited by 984x4; 10-26-2008 at 07:52 PM.