Hi all....I'm new to this forum, and it looks like a good place to ask questions, so...
I have a 1999 Yukon purchased new, best vehicle I have ever owned.
I am beginning to 'mess' with it a little, now that it is no longer the primary road car, GMC Arcadia now fills that slot.
Anyhow I've been looking at the air intake, and considering a K&N cold air intake system.
My purpose is to squeeze a mpg or 2 from the Yukon just as a matter of principle, not a hp gain.
I was running a stock (for the 99 Yukon) K&N air filter and the engine seemed to struggle to breathe.
That's when I replaced it with the cheapest Chinese filter I could find and left the cover off, mpg increased noticeably, but not dramatically.
Then I became interested in the cold air K&N system, the first thing I looked up was opinions on the rear mounted black box that had VORTEX on it.
The information that I found was it slowed the air going to the carburetor ...something to do with the epa.....
Well I removed that, reassembled everything ...cranked her up, and....... not good...looping idle and attempt to stall.
I had to fill the hole left by the vortex box, luckily the rubber connection is hose clamped to the carburetor cover and the vortex box inserts into the other end.
The only thing I could find lying around that fit the hole was a blue 1 quart mayonnaise lid, fits perfectly, I say blue cause the yellow one was to big.
Now Idle rpm is steady at 500, engine a tad more responsive, and seems quieter .
One big improvement I did notice is when coasting down a bridge/hill My scanguage jumped from 35-40 mpg to 40-50-60 mpg, so something is going on however minor.
For the time being I have shelved the K&N cold air system to further test the effects of the mayo lid, and the $17 Chi com filter
The one thing I don't know is how the computer may react/adjust to the changes, all sensors remain in place.
I've never run a 'cold' air intake system, so perhaps I'm missing something?
Any thoughts/comments/etc?
Anyone else do this or something similar?
Thanks for staying with me on this, Ron
I have a 1999 Yukon purchased new, best vehicle I have ever owned.
I am beginning to 'mess' with it a little, now that it is no longer the primary road car, GMC Arcadia now fills that slot.
Anyhow I've been looking at the air intake, and considering a K&N cold air intake system.
My purpose is to squeeze a mpg or 2 from the Yukon just as a matter of principle, not a hp gain.
I was running a stock (for the 99 Yukon) K&N air filter and the engine seemed to struggle to breathe.
That's when I replaced it with the cheapest Chinese filter I could find and left the cover off, mpg increased noticeably, but not dramatically.
Then I became interested in the cold air K&N system, the first thing I looked up was opinions on the rear mounted black box that had VORTEX on it.
The information that I found was it slowed the air going to the carburetor ...something to do with the epa.....
Well I removed that, reassembled everything ...cranked her up, and....... not good...looping idle and attempt to stall.
I had to fill the hole left by the vortex box, luckily the rubber connection is hose clamped to the carburetor cover and the vortex box inserts into the other end.
The only thing I could find lying around that fit the hole was a blue 1 quart mayonnaise lid, fits perfectly, I say blue cause the yellow one was to big.
Now Idle rpm is steady at 500, engine a tad more responsive, and seems quieter .
One big improvement I did notice is when coasting down a bridge/hill My scanguage jumped from 35-40 mpg to 40-50-60 mpg, so something is going on however minor.
For the time being I have shelved the K&N cold air system to further test the effects of the mayo lid, and the $17 Chi com filter
The one thing I don't know is how the computer may react/adjust to the changes, all sensors remain in place.
I've never run a 'cold' air intake system, so perhaps I'm missing something?
Any thoughts/comments/etc?
Anyone else do this or something similar?
Thanks for staying with me on this, Ron
