When Hyundai builds cars, they build them to be sold anywhere. To
keep the butterflies from freezing open while driving in extremly cold weather, they flow engine coolant through the throttle
body. This keeps the throttle body warm, which also warms up your intake air. This is not good for performance. I noticed
that my car seem to run real strong when it was cold. But the longer I drove, the more I seemed to notice a loss in power.
I bypassed the hoses flowing coolant into my throttle body and this problem is gone. My car now has power when the engine
is cold or hot. Alot of other people have also done this to their Hyundai (and other cars) with good results.
Hoses 25471 are the ones to be removed. They can be removed with
a pair of pliers or very strong fingers. They connect to the bottom of the throttle body and to the heater hoses.
In this picture you can see the fittings on the bottom of the throttle
body (top right hand side of picture). These can be left uncovered or connect a stock hose in a U shape to them.
The
only thing you need to purchase is 10" of hose the same size as the stock hoses and two small hose clamps. Make sure the engine
is cool so you dont get burnt. Leave the radiator cap on tight to help keep coolant leakage to a minimum. Removing some of
the engine covers may help you reach things easier.
1. Remove both stock throttle body heater hoses.(Part 25471). Place
a couple of rags underneath to catch coolant that comes out (about half cup or less)
2. Connect new 10" hose and small hose clamps to fittings on heater
hoses and tighten.
3. Throttle body fittings can be left open or connect a stock coolant
hose in U shape to both fittings. No coolant will come out of throttle body (except for the first half cup mentioned in step
1) once coolant lines are disconnected, but some people worry about rust or dust getting in the fittings.
I first
did this using both stock coolant lines and clamps. It will work, I used it for hundreds of miles, but the one on the heater
hoses(the one with coolant still going through it) was crimped. The 10" hose is long enough to handle the U shape without
crimping. I recommend replacing the hose clamps as the stock ones dont seem as strong after being removed. None of the stock
hoses or clamps ever failed, I just feel safer and better with the new hose and clamps. I just recently saw someone selling
a kit for this on Ebay. Here it is for free, or the price of a 10" hose and two clamps. This does NOT ADD horsepower, but
keeps you from losing it when the engine gets warm and heats up your intake air. I noticed a big difference, but I also have
a Cold Air Intake system, but others who have done it with the stock airfilter system say it worked for them also. Have fun.
JPJR
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Here are some photos submitted by club member davids03xd that may help:
