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Random surging around 60 KM/H (3.8 Lumina LTZ)


Firen81

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So, I am a little confused. When my car seems to be warm, around 60 kmh, the engine seems to surge a bit. as a side note, I think my transmission is shifting weirdly. I was thinking Vacuum leak?

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The brake switch is another good place to start - I remember my W-body had a TSB out on this. Was basically like the torque converter was rapidly engaging/disengaging

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Plug wire would be consistant...i would know, its happened. This almost feels like what skitchin described. Feels like that between 60 and 70. Have to put more pedal into it to have the trans to hook up almost. I thought vacuum because i had to lead foot it.

 

Btw, forgive any possible really wrong words. Phone seems to have a mind of its own some days...

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