my car idles like crap i took it to the shop they told me i had a vacume leak by throttle body so i bought a new one. that didnt fix it i ran the codes and i had to get 2 new sensors an o2 sensor and the one that goes on bottom of throttle body the tps is fine but it still runs lke **** the idle is up and when you hit the gas it just dies after it is warmed up can any one give me some advice as to waht is going on its an 87 350 l98 engine

 

they told you you had a vacuum leak by the throttle body, so you bought a new throttle body? i would hope that you ment to say you bought a new gasket for the throttle body, instead of spending a lot more than the $5 for a gasket.

sounds to me like your fuel system might be gummed up. i had this happen to me a few years back. the car started fine and idled perfect, but when i hit the gas it would sputter and die. i think i wound up paying $100 for a compete fuel system flush and it ran great after that.

 

You need a vacuum gauge. Check the vacuum yourself. Go to this site and it will tell you where to look from there. I double the comment about the gasket. A new throttle body on a failed gasket will give you the same problem. There is very little that can make the throttle body itself leak vacuum.

 

i have 2 new gaskets on the top and bottom of throttle body and when you start it it idles like crap still and even worse when you put it in drive

 

i had this happen to me also it would run fine for i lil bit till i tried going somewhere on mine it turned out to be a bad full pump that once it got hot it stopped running i got i new one from summit im sure they would have yours too

 

did it idle kindof ok just shook alot and then when it warmed up ran like straight crap

 

when u rev it in park, does it run like crap, is it only when the engine is under load?

 

it idles and runs like crap when it gets hot

 

try running some fuel system/injector cleaner through it.