Coolant lines are ran to the throttle body for 1 of 2 reasons.
1) To prevent throttle plate ice up. Yes it may be a rare occurance, but one most manufactures were worried about
2) To cool the throttle body when the EGR is active. Some manufactures (circa Ford) had the EGR routed to the throttle body. The coolant was needed to keep the throttle body temperatures down.
1) To prevent throttle plate ice up. Yes it may be a rare occurance, but one most manufactures were worried about
2) To cool the throttle body when the EGR is active. Some manufactures (circa Ford) had the EGR routed to the throttle body. The coolant was needed to keep the throttle body temperatures down.
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