I Just picked up my very first Camaro! It's an 87 lt with a bone stock LG4 and carb. I was told that the Motor and carb was rebuilt just over 15k miles ago(no papers to prove this). Now since I have never owned a Carbureted car and know nothing about carburetors I'm looking to you guys for help. For the most part the car runs and drives with no problems as long as im easy on the gas. 1) When I start my car after the motor is warmed up to about 205* it starts to bog down, and if I don't push and hold the gas pedal for about 3 seconds it stalls and then takes a second to start. After that three seconds it runs and idles fine. 2) My second problem also occurs when the car is warmed up. If I gun it from a dead stop it runs hard till about half way through second gear and then starts to bog and hesitate so I have to left off the gas and just let it idle for a few seconds before it stops.
So is this a carburetor problem? Is my problem fuel or air? Thank you for your time.

 

For problem #1, you mean the car runs badly for about 3 seconds after a hot start?

Problem #2 is a fuel delivery issue.

 

Sounds like the carb needs to be properly tuned. The stalling out when starting is probably due to the fast idle, idle mixture and choke not being set right. As for the second problem, usually this is because too much fuel being delivered when you get on it. This can be due to the idle mixture screws being turned too far out and/or the mixture control solenoid not properly set at height. I've had all these issues before to some degree when installing a rebuilt carb. It's a matter of fine tuning the carb and also making sure the timing is properly set.

 

So is this something I should let a shop do for me? Like I said, I know NOTHING about carbs. If Its not that complicated, I'm more than willing to learn and do it myself.

"For problem #1, you mean the car runs badly for about 3 seconds after a hot start?" - Yes, thats exactly what I mean. It also smokes black right after this and then everything goes back to normal.

 

An '87 will have an in-tank electric fuel pump along with the mechanical pump on the engine. Most people, including mechanics, assume since the car has a mechanical pump, that's all there is. But, obviously, in this case, that's not all there is. When the electric pump fails (and that's pretty much 100% by 20 years), the mechanical pump can still supply the carb most of the time, but under high demand conditions, it won't be able to keep up unless the in-tank electric is also working.

For your problem 1), I'd check the choke pull-off. If that operates as it should, then you probably have "classic q-jet well plug leakage syndrome".