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Discussion Starter · #1 ·
So today I picked up a 4.0 throttle body with sensors and everything and planned for an easy install but so far, no luck. All wiring and bolts lines up and bolted down with ease. BUT when I go to turn her over, she sky rockets and I turn her off, any body have a clue why? Help please... Thanks
 

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A vacuum leak is causing those high rpms, it's very likely leaking where it is bolted to the intake manifold. How is the gasket between the throttle body and intake manifold?
 

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Discussion Starter · #7 ·
the gasket seemed to be fine, no cracks or anything, I can get another I suppose from autozone, any other suggestions?
 

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Discussion Starter · #8 ·
it's my daily driver so I went ahead an put the 2.5 throttle body back on and she turned over fine, just like before, I'm gonna try swapping all those sensors today and give it another go :confused:
 
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