Anybody know why they did that? I've got a '96 F150, and one of the plugs rusted out in the throttle. I soldered it, it still leaked. I drilled it out and tapped it, and tried to plug it up, but it broke even worse. Finally, I said screw it and just bypassed the whole thing. I had to go to work the next day.



So I guess my question is... why did they route coolant through the throttle? Will my bypass hurt anything? It seems to run fine now, but will this cause some trouble in the future (should I eventually buy another throttle body, or leave it like this)?

 

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If it was to heat the butterflies and keep them from freezing then why was it left off of the mustangs. They are ran during the winter also.

 

I fig it was for that too...I ditched mine a long time ago...never had a prob. If yer butterflies are adjusted right you shouldn't have any probs.

 

some cars have a wax pellet in the TB that expands when the coolant heats up and this kicks down your 'cold idle' to 'normal idle' I don't know if the 302 TB has this ---

 

its suppost to keep your throttle body warm for colder starts mine was bypassed so i hooked it up the factory and now it leaks out the throttle body better off to leave it alone

 

By the time it warms up enough to make a difference the engine will be warm enough to run right without it. I could see if it was ported from the exhaust manifold like the old carb engines have, but the coolant is directly related to the engine temp and will not help until the engine is hot.

 

YES - this is exactly why Im confused -- if its to keep the TB from freezing on a cold start up it wouldnt make a difference until the coolant got hot to begin with...

so there must be another reason / different function of this set up...

someone must know for sure out there....

 

Could it possibly be for the reason of de tuning? I know ford dials back their engines for longevity. Maybe warming the air a bit has something to do with that....

 

Thats what I was thinking, that it warms the air after the coolant gets to operating temp and leans out the ratio a bit.. just a guess..... I cant find a documented answer anwhere...