Quote:
Originally Posted by RodsGreen10
Yep that's how it grounds.
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Well, that's a ****ty ground.
Maybe (and this is a stretch) when it's cold the only areas that are making good "ground" have shrunk due to the cold and when it gets around 100 degrees it warms up and grows and makes contact (thermal dynamics).
Everything moves when it comes to temperature, granted it may be only .001 but even a .001 can make a difference.
You edited your post as I was typing
The studs do have a good ground but the studs are threaded in to the intake. The throttle body coating could possibly not make electrical contact to the studs or not make a good enough one for the ECU.
Again it is a stretch but it could be an issue.