"bob" > wrote in message
...
> Looking for advice. Having problems with 1970 Coougar w/351c. It is hard
> to start and uses lots of gas (<9.something mpg in city, used to 12 or
so).
> When strarting cold, it appears to flood easy as you can smell gas at tail
> pipe. Recently put kit in carb trying to fix this and found float orings
> pretty much gone (crumbled when removing) but can't say much improved.
>
> Changing the plugs helps with the starting for a while but not long.
Pulled
> plugs and the front 4 (1, 2, 5 and 6) are black with soot but other 4 are
> ok. This is after about 500 miles on new plugs. The motor was rebuilt
> about 10 years ago with a used alum edlebrock dual plane intake and 600
cmf
> Holley 4bbl. There are no vacuum leaks to the outside along the intake to
> head seams. Don't think there are any other vacuum leaks.
>
> What would cause the front 4 plugs to run rich but the back 4 be OK? I'm
> 99% sure cylinders 1,2,5 and 6 are not on the same side of the dual plane
> intake so does that elimnate the carb having a problem left to right? I'm
> tempted to get a new carb but would like some confidence that will solve
the
> problem. Since the carb rebuild, there is a flat spot in the throttle
when
> you accelerate hard. Probably just the accel pump not set right but maybe
> another symptom.
>
> Any advice appreciated. I will try to post pictures of the 8 plugs later.
> thanks, bobby
> bbusselmanCoyote at hotmail dot com (remove the dog to send email)
>
Forgot to add that I have opened the choke wide open a month or so ago and
still floods easy.
thanks
bobby