my car bogs down .......
 

at around 3800 my car starts bogging down and back firing i checked the secondary injectors they look good what else would cause this please help!!!!!

Bad grounds

so where should i make sure the grounds are good at
and what all should i ground out

Cheack all grounds in the engine bay. I'm not really an expert with the problem, i just know that bad grounds cause it. Search for 3800rpm hesitation.