Rpm drop when shifting From park

[Rck68]

Hi all,

why does my rpm drop to the point of even killing the engine, when shifting from park to reverse, or drive?

440 with a pretty big cam, rpm in park is 970-1000

Rob K

 

[beanhead]

Timing/mixture settings are off.
If it's wanting to stall, they're way off. I suppose it could be a converter mis-match issue, if your "pretty big (?)" cam got stuck in front of a tight low-stall unit. But I'd be looking at timing and carb first because it's easier than swapping converters.
Pretty much zero info given so that's about all anyone can say...

 

[dvw]

Is the carb is right? Does it have 15-20 degrees initial timing. If so the converter is to tight.
Doug

 

[Rck68]

Ok guys thank you for the tips, I’ll start with the mixture first.

 

[fastmark]

What is your vacuum at idle? It’s sounds too rich.

 

[YY1]

sounds like classic symptoms of vacuum leak.

 

[Rck68]

sounds like classic symptoms of vacuum leak.

I did just replace my intake to a new edelbrock performer. Ill check there and the carb