rough idle

[gerrycole]

hi boaters, last summer my 93 4 winns 5l efi with eec4 engine control got an internal cracked block.
i picked up a used block with a new edelbrock cam # 7122 in it. i transferred all parts to new block.
it runs fine but does not idle well and dies with out throttle turned up. this clears up if you increase the vacuum
but i have exhausted ways to do this and idle vac is 11 inches. is there any way to increase the vac
permanently and reliably? i expected it to be a little lumpy,not die out. it runs rich at idle,
smells like gas in exhaust.

any suggestions, thanks, gerry.

 

[Bondo]

Re: rough idle

hi boaters, last summer my 93 4 winns 5l efi with eec4 engine control got an internal cracked block.
i picked up a used block with a new edelbrock cam # 7122 in it. i transferred all parts to new block.
it runs fine but does not idle well and dies with out throttle turned up. this clears up if you increase the vacuum
but i have exhausted ways to do this and idle vac is 11 inches. is there any way to increase the vac
permanently and reliably? i expected it to be a little lumpy,not die out. it runs rich at idle,
smells like gas in exhaust.

any suggestions, thanks, gerry.

Ayuh,.... Welcome Aboard,.... What's the Spec's on the cam,....

Odds are it's gonna be The problem,....

Yer computer ain't gonna know how to adapt,..

 

[jbetzelb]

Re: rough idle

I agree on the cam comment above but I have to ask. Are you sure there are no vacum leaks. Intake manifold or a simple missing vacum hose.