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 Re: I'm not crazy -I really have more power now!
[Re: Axe Man]
#379948
01/21/04 11:46 PM
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Joined: Nov 2003
Posts: 166
Wheeler
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CBP, your first idea probably made the engine run very lean, especially at idle, because air flow through the hoses was uncontrolled. I suspect your second idea made it idle very rich because there needs to be a little air getting into the intake manifold so it will idle.
I'm experimenting with some brass fittings of various sizes in the hose leading to the air duct that goes over the cam cover. I think restricting, not blocking, air flow in this circuit will be what we want. I'll report back with my findings when I learn something.
Axe, you're right. This thread IS fun.
Don, y'all
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Paw-paw Don, y'all
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Favorite quote: "One need never apologize for exercising the Golden Rule."
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Re: I'm not crazy -I really have more power now!
[Re: here]
#379949
01/22/04 12:12 AM
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Anonymous
Unregistered
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Holy shi*, Axe. You ain't going to believe it! I swear this is true. All I did was unplug the damn thing! Wow.
. . . I pulled the sportie into the garage 20 minutes ago and said, oh, what the hell. I left it idling, popped the bonnet, grabbed ahold of the connection, closed my eyes, gritted my teeth and yanked. My idle simply dropped a little bit into a low, super-smooth purr. Idle RPM was around 900-1,000 before; now it sits at 800, and man is it quiet.
But wait, that isn't the best part. That RPM hold? Gone! Good-bye, you sumbitch! And throttle response is amazing. It's instant. The engine revs freer, faster, seemingly smoother, and where before I used to get these really cool off-throttle burbles and pops, no doubt helped out by my aftermarket exaust, I REALLY have burbles now. Not loud, not annoying, just right.
As for more power, I think yes, especially right off the line, but only just a little. That may be an illusion by the new, snappy throttle response, but the real way I'll find out is when I get it on the freeway. Heck, I LIKE this.
I'm real tempted to open that part up and peek inside of it. Maybe I can do something to make it even better. If not, I'm not complaining. I'll keep it just as it is.
Oh yeah, I stopped and started the engine a dozen times or more, both totally cold and warmed up to operating temp, and it fires up just like it did before.
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Re: I'm not crazy -I really have more power now!
#379950
01/22/04 12:20 AM
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Anonymous
Unregistered
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That was the only thing that I didn't try, but makes sense... I;m going to try that tomorrow!
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Re: I'm not crazy -I really have more power now!
#379951
01/22/04 12:21 AM
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Joined: Mar 2002
Posts: 4,497
Kia Moderator Emeritus
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Holy shi*, Axe. You ain't going to believe it! I swear this is true. All I did was unplug the damn thing! Wow.
. . . I pulled the sportie into the garage 20 minutes ago and said, oh, what the hell. I left it idling, popped the bonnet, grabbed ahold of the connection, closed my eyes, gritted my teeth and yanked. My idle simply dropped a little bit into a low, super-smooth purr. Idle RPM was around 900-1,000 before; now it sits at 800, and man is it quiet.
But wait, that isn't the best part. That RPM hold? Gone! Good-bye, you sumbitch! And throttle response is amazing. It's instant. The engine revs freer, faster, seemingly smoother, and where before I used to get these really cool off-throttle burbles and pops, no doubt helped out by my aftermarket exaust, I REALLY have burbles now. Not loud, not annoying, just right.
As for more power, I think yes, especially right off the line, but only just a little. That may be an illusion by the new, snappy throttle response, but the real way I'll find out is when I get it on the freeway. Heck, I LIKE this.
I'm real tempted to open that part up and peek inside of it. Maybe I can do something to make it even better. If not, I'm not complaining. I'll keep it just as it is.
Oh yeah, I stopped and started the engine a dozen times or more, both totally cold and warmed up to operating temp, and it fires up just like it did before. Hmmm...interesting. <img src="/forums/images/graemlins/shocked.gif" alt="" /> But before you throw a party try this: Turn on the A/C and put it on full. The engine might stall. Now that you removed the electrical connector the ECM has no way of compensating for a varying load at idle, like the A/C compressor. Ever notice that when you click on the A/C that the idle boots up a bit? That's the ECM commanding the IAC. With an already low idle the engine might lug or stall with the A/C on. But...none the less...this is REALLY interesting. <img src="/forums/images/graemlins/smile.gif" alt="" />
1998 Sportage - Gone.
2004 Honda Civic Coupe.
2007 Suzuki Grand Vitara - She got it.
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Re: I'm not crazy -I really have more power now!
[Re: Axe Man]
#379952
01/22/04 12:33 AM
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Anonymous
Unregistered
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Okay. That's a good idea. I'll run outside to check on that right now. I'll be back in a minute . . .
CBP, I was thinking about that exact thing the whole time I was out test driving it. I was thinking that surely you would have tried this already, but why hadn't you said anything about it? That's almost funny, but not really. Put all that back together, unplug it and tell us what you think.
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Re: I'm not crazy -I really have more power now!
[Re: here]
#379953
01/22/04 12:43 AM
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Anonymous
Unregistered
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No ill effects at all. It's hard to tell just by the needle, but with the A/C on full cold the idle seems to drop only perhaps another 50 RPM, and it holds rock steady. Weird. I can't explain this. Why couldn't I have figured this out years ago? <img src="/forums/images/graemlins/angry.gif" alt="" /> <img src="/forums/images/graemlins/angry.gif" alt="" /> <img src="/forums/images/graemlins/angry.gif" alt="" />
Hee, hee. I had to sit there for a minute and keep blipping the throttle. It's amazing how much faster it spools up now, and that RPM hold is definitely gone.
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Re: I'm not crazy -I really have more power now!
#379954
01/22/04 01:58 AM
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Joined: May 2003
Posts: 1,133
Body Damage is Cool
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Now, is this only for sportages before 98 or for all? Also, if what you are all saying is true, then why do they even have it there in the first place? I'm just not understanding ....
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Re: I'm not crazy -I really have more power now!
#379955
01/22/04 02:13 AM
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Joined: Mar 2002
Posts: 4,497
Kia Moderator Emeritus
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No ill effects at all. It's hard to tell just by the needle, but with the A/C on full cold the idle seems to drop only perhaps another 50 RPM, and it holds rock steady. Weird. I can't explain this. Why couldn't I have figured this out years ago? <img src="/forums/images/graemlins/angry.gif" alt="" /> <img src="/forums/images/graemlins/angry.gif" alt="" /> <img src="/forums/images/graemlins/angry.gif" alt="" />
Hee, hee. I had to sit there for a minute and keep blipping the throttle. It's amazing how much faster it spools up now, and that RPM hold is definitely gone. OK, the big test will be letting it sit overnight and see what happens when you start it first thing in the morning. I really have reservations about this working in cold climates. There's no way the engine will idle at the cold speed of 1000 - 1200 RPM when the IAC is disconnected. It will most likely stumble and run poorly until warmed up. Tlab, dunno if you can do this on the 1997 and newer with the redesigned IAC. Someone will have to be brave and try it. (I'm not because mine is soldered). The other issue would be dealing with a permanent CEL. I'm sure the IAC is resistive so you'd have to measure the IAC resistance and use a resistor of a close value tied to B+ to fake out the ECM. But a quick check of the circuit diagram seems to imply that the ECM does a "command" and "confirm" with the IAC. In that case it would be almost impossible to fake it out.
1998 Sportage - Gone.
2004 Honda Civic Coupe.
2007 Suzuki Grand Vitara - She got it.
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Re: I'm not crazy -I really have more power now!
[Re: Axe Man]
#379956
01/22/04 02:27 AM
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Joined: Nov 2002
Posts: 167
OP
Wheeler
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Myshorts -now you can understand how excited I got!
As I said earlier, It will be a problem I think if you are in a cold climate. But where/when its warm, this mod seems like a winner.
My gas mileage doesn't seem to be affected -or not noticeably. But Axe, what you say about cold start, which for me means after an overnight -even here where it is warm, is accurate.It doesn't fire up right away after an overnight, and does a little stumbling until warm -it's nothing I can't live with, but I'm going to bring it back to see if any minor adjustment can be made.....
Roan
Canuk in d' Philippines '97 4x4 Sportage DOHC SOLD! 2000 4X4 Grand Sportage long body Turbo SOLD <img src="/forums/images/graemlins/frown.gif" alt="" /> Bought another (standard length) 2000 Turbo Intercooler Diesel auto4X4 
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Re: I'm not crazy -I really have more power now!
#379957
01/22/04 02:44 AM
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Anonymous
Unregistered
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CBP, I was thinking about that exact thing the whole time I was out test driving it. I was thinking that surely you would have tried this already, but why hadn't you said anything about it? That's almost funny, but not really. Put all that back together, unplug it and tell us what you think. To be honest with all of you, I felt stupid connecting the hose to both ends, bypassing the IAC... And the most obvious, I didn't do! But I'm going to try tomorrow.
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