Whats the problem here?

[tylermckee]

Have a 454 in a 87 p30 chassis. Engine seems to idle fine when you first fire it up, after a few minutes the idle kicks down and it seems to idle normal, has about 20# vacuum and holds steady. Then after running 10 minutes or so and getting fully warmed up it just wants to die, wont keep running unless i give it some throttle. Otherwise it will just bog down and die.

What are some of the things that could be going on here so i can run through and check everything.

[Srubydo1986]

adjust the idle screw more then all is well.

[xtreme80]

Sounds like it could be flooding out too. You can look down int he top of the carb and see if it's pouring too much gas into the engine.

[tylermckee]

Originally Posted by Srubydo1986

adjust the idle screw more then all is well.

I forgot to add that it also runs pretty rough when this happens, so i dont think its gonna be that simple.

[Srubydo1986]

well then i got nothin that i can think of cause all the vaccums are good, correct?

[xtreme80]

Or better yet, RIGHT AFTER it dies the first time, look down into the top of the carb. Is it really wet? Can you smell alot of gas in there?

[trkklr77]

wiht all the temp based vacume switches and the 91' of vacume line i would bet that you have a open end somewhere or bad and old lines.

[tylermckee]

I've been replacing all the vacuum lines as they are all old and rotten. I just didnt understand the whole only dying when its warm thing