HELP disappointing time slips!!!!

[skiwesser]

Ok, I still haven't had a change to do a full compression check, working all week, but I hooked my Vac guage up and at idle I'm only reading 14" , it should be around 20" right?
It' acts right when I blip the throttle and when I hold it at 2000 rpm's for 20 secs. or so and close throttle it holds at 3-4" higher for a few seconds as it should .
I've been told this low a reading is probably late valve timing, does this mean the cam is off??!!??!!
Or could it be a tight valve, will a compression check tell me if it is a tight valve? I'm guessing that cylinder will have a exessivly low reading?
Will it matter if I do it with a cold engine or must it be up to temp?

Thanks
Wes

[Dark_5.0]

Originally Posted by skiwesser

Ok, I still haven't had a change to do a full compression check, working all week, but I hooked my Vac guage up and at idle I'm only reading 14" , it should be around 20" right?
It' acts right when I blip the throttle and when I hold it at 2000 rpm's for 20 secs. or so and close throttle it holds at 3-4" higher for a few seconds as it should .
I've been told this low a reading is probably late valve timing, does this mean the cam is off??!!??!!
Or could it be a tight valve, will a compression check tell me if it is a tight valve? I'm guessing that cylinder will have a exessivly low reading?
Will it matter if I do it with a cold engine or must it be up to temp?

Thanks
Wes

Your vacuum reading is pretty normal for a cam'd 302. A valve that is adjusted too tight will usually result in a compression reading of "0".

It wont really matter if you do the compression test cold or hot cause if you have a problem it wilkl be really obvious.