This should be good... I'm going to describe my sound and what my Mustang does, and I hope you can direct me or guide me to where to start....

So, my mustang lurches forward when I have it in drive and I'm moving forward slowly. The engine rev's up a little bit, and unless I have my foot on the brake, it'd really just jump. It only happens in drive, and only when the car first turns on (until it seems to warm up a bit), and only at slow speeds...

Where should I start? Is there more information you need to know?

 

check the idle....

 

The jumping doesn't just happen once, it happens multiple times... Are you just saying to adjust the carb?

 

anyway you could post a video?

I am thinking that the car is supposed to move forward slowly in Drive with no pressure on the brake.

 

it is supposed to move some.. but they way you describe it, it really tries to go on you.. do you have a tach? whats the idle set at?

 

I have a testing tach, so I'll hook it up tonight to find out. But if my idle was set high, would it cause it to jump? I mean it jumps, and slows down, then jumps, and slows down... it'll keep that up for a while till the engine is hot.

 

Check trans fluid?

 

My 67 does that. I gun it and then go back to neighborhood speeds and it stops. It doesn't bother me a bit. Only does it when it is cold outside.

 

i would check trans fluid first, maybe converter not full?