Hello I am a newbie picked up an 84 for my son and I and it idles rough and hesitates on acceleration, changed plugs, wires, distributor cap & rotor, coil, fuel pump any help would surely be appreciated!

 

Have you checked to see if both throttle body injectors are squirting gas? Any trouble codes, check engine light?

 

Yep both spitting fuel and no codes at least no check engine light as stated I am new to the vette arena but learning. How do I get the stored codes if I have no idiot light?

 

Short the 2 terminals together on the diagnostic connector in the upper right hand corner, then turn the key on and count the flashes of the CE light. Each code will blink 3 times, pay no attention to code 12 at first. Have you checked to see if the coil wire is good?

 

No codes! Really has me puzzled with no code it is a shot in the dark I can't find a vacuum leak maybe fuel pump? EGR?

 

Maybe the temp. sender on the intake that tells the computer how warm the engine is running . Had same symtoms on a truck w/ same no codes. The engine ran too rich and floods out causing the cats. to pull up. Changed the sender and the corroded plug and the engine ran good.

 

Have you checked engine vacuum @ idle, and checked compression? Get a pair of plastic pliers and pull plug wires one at a time @ idle to try and isolate which cylinders are missing.

 

Well I went and changed the Fuel Pump what a difference not perfect but it sure isn't bad for a 24 year old car! Thanks to all those who tried to help it is appreciated. I am sure I will have more questions as I learn!