okay, my car is an 84 Z with an lg4. whenever i punch it from a stop it hesitates. it will lunge forward then bog down then lunge forward and so on. after a few seconds it will finally go.

when i first start my car up it idles at like 1500 for like 4 min then finally goes down to like 800

and finally sometimes when im at a stop just idiling the car with stutter a little bit.

any help is appreciated.

 

carb is too rich doesn't sound like a vacuum leak

 

ok that does make sense. sometimes when i warm the car up in the morning and let it idle blackish water will come out. the aircleaenr also smells a little like gas. does being to rich cause a car to diesel?

 

Good question, my wife's firebird does the exact same thing. If it is rich, how do you correct that? I'm kind of new to Carbs.

 

My car does the same thing. I fixed my vacuum leaks so it doesnt shake anymore. Yet it does hesitate sometimes and idles wrong. Im having it looked at on tuesday.

 

Invest in a rebuild kit for your carbs. :rockon:

 

diesling is usually a timing issue.

 

Dieseling is caused by high compression on low octane fuel or too high a heat range sparkplug.:rockon:

 

not nessicarily, my old lg4 used to diesel, and you can't say that an 8.5:1 motor has high compression. or is too much compression for 87 octane.

 

dieseling is caused by hot spots, and high compression from carbon buildup, not the engines compresssion, try turning down the idle (by closing the blades) and richening the idle mixture to bring the idle speed back up, use a vacuum gauge to get the highest vacuum at idle and the dieseling should go away unless you have crazy carbon buildup or the car is running too lean while driving, in which case just let it idle for 15 seconds before you shut it off...then figure out why your running lean later.