So i just rebuilt the motor in my truck(90 burban with 350). Its totally stock exept its bored .020 over, and has a diffrent(still very computer freindly)cam. Now i have a code 33. According to this sight http://chevythunder.com/fuel%20injec...0pg%20a.htm#32It means that the map is bad. I replaced it, and still no diffrence. Does anyone know if a valve staying open(as in being too tight) can cause this? I put a vacume gauge on it and it reads about 20in of vacume(of coarse my va. guage could be wrong also)which tells me it dosnt have a vacume leak. The needle on the guage dosnt stay exactly in one spot but its pretty close.

The symptoms: Basicly only at idle, it will kinda run like it has a really big cam in it. if givin only a very slight amount of gas taking off from a stop light for example it will stumble untill i get on it harder. Smells like its running rich, then while driving it just dosnt quite feel like it has the off the line pep that it ought to. Though i have only got on it about 35% throttle sence the motor is so new. I dont know anyone have any ideas?

 

well do what that site tells you check your wireing and def check your plug wire routing if you think it is running rich check those plugs too and which cam are you talking about that is very computer friendly?....btw you probably wont get many replys in a third gen forum so search elsewhere too