i have recently purchased a 91 camaro 305 TBI. I changed, plugs, wires, cap, igniton pickup, ignition module, fule filter, pvc.
i am having a problem with it when the throttle was being applied. At both idle and WOT the car seems fine but when driving it or even in park when i increase the throttle the engine begins to chugg and shudder then when i let off the gas the car almost cuts out any suggestions what this might be.

 

Try checking your exhaust, if your cats/muffler are cloged then your not getting propper air flow. I had a similar problem till I replaced my cats.

 

Any Service Engine Soon light?

 

cat it gutted and i cut the exhaust out so that its a straight pipe to see if that was the problem, and no there are no check engine lights on could it be knock sensor

 

Look for broken/missing vacuum lines - vacuum can do terrible things.

 

yeah probly shoud go about changing all of those they are lookng kindda rough ill start there, you know anyone that has a tensioner pulley, i broke mine off my 88 yesterday

 

I believe kthat you can get one from Autozone's Rent-a-tool

 

a vaccume tester you mean

 

Autozone shows both a seperate pulley and the tensioner assembly available - Pulley alone in stock most stores $19.99 - Tensioner Assembly and order item $51.99 - probaly can order at local store and get in a day or 2 tops, as they have warehouses everywhere.

I did a search on their sire for Idler Pulley.

The vacuum lines can all be replaced with hoses the right size - the plastic lines impossible to get without yanking out of boneyard. Just be careful with the one running into the firewall at the pass side - it's the one you don't want to have to reroute, as it's tangled with all the wire harness (it runs vacuum lines to your A/C & heater controls).

 

if the heather controls are not hooked up do youthink that could be my vacum problem. I dont have them hooked to the control unit in the dash

 

Definetly try plugging that line. I have never tried unplugging the heater vacuum line and seeing the results, but it is just like any other vacuum line. PLug it.