General  Engine / Induction / Exhaust  Suspension / Tires / Brakes  Transmission / Drivetrain / Rear End  Why and how should I bypass the throttle body coolant lines?   A small amount of coolant is pass through the small hoses connecting to the throttle body. The main reason is so that during the winter months, the higher temperature of the coolant will keep the throttle body warmer thereby preventing icing. That's where the problem lies during the other months. By warming up the throttle body, you're warming up all of the air passing into the engine and thus losing some power (since cooler, denser air makes more power). It is also believed that during the hot, summer months, the coolant pass-through works to cool off the throttle body. So you must be careful when bypassing this so as not to lose it's benefits. To do the bypass, first remove the small hose going into the throttle body on the driver side. You will probably have to remove the rubber intake elbow and black alternator brace. Make sure you have some rags handy to catch any coolant that my drip out. On the passenger side of the throttle body there are three hoses. Remove the lower one (which is very short and has a 90 degree turn to connect to a metal intake manifold hose). You may have to remove the other two hoses along with the sensors to get better access to the clamp. Then pull the disconnected driver side hose over, and connect it to the metal intake manifold hose from which you just disconnected on the passenger side 90 degree-turn hose. Hold onto that 90 degree hose in case you need it in the future.
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