GTU smokes when downshifts
08-27-04, 12:55 AM
#1
Lets rock.
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Join Date: Apr 2004
Location: SLC, Utah
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GTU smokes when downshifts
Simple problem. I just got a '90 GTU that has sat forever (around 2 years) and the car fired right up and I've got some good gas in it now. So now when I take the beast up to 7k rpm it stops pulling after that. And after I downshuft it lets out a big puff of grey smoke. Still has the stock airbox and exhuast. I'm guessing the cats are clogged. The car doesn't smoke any other time. Just after I downshift at high rpm.
08-27-04, 07:01 AM
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Seduced by the DARK SIDE
Join Date: Apr 2001
Location: Orange Park FL (near Jax)
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The oil control rings are about worn out. It's not an urgent issue. Maybe port it when you you rebuild it next year.
In the meantime:
The 7K nose over - A header with a free flowing exhaust will fix that.
A free flowing cold air intake will help also.
Then your port job be amplified.
In the meantime:
The 7K nose over - A header with a free flowing exhaust will fix that.
A free flowing cold air intake will help also.
Then your port job be amplified.
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