I installed the 2.4 intake manifold in my car, seems like they don't like each other.

Had it there for 2 weeks with my old throttle body (that I clean so I tho it was bad.)waiting for the "relearn" process . no success same thing.

So today I was like okkkk I got the money I went to auto zone and bought a new throttle body to see if it stops acceleration by him self. Annoying when I come to a stop sign or light, put it in neutral and uńnnnnnnnnn whyyyyy ,, when I drive it and shift it feels smooth put it in neutral and 3k here he comes.what can it be?

 

I had a HUGE exhaust leak awhile back, and when it was in neutral it would climb and climb, but driving was normal. Check for leaks with a fluid of some kind? other than that, i'm not much help.

 

I had a high idle once and it was due to an air leak between the intake manifold and cylinder head I think. I just removed it and reconnected it and it went away.

 

you could try unplugging the map if you think its a vac leak