i dont think its injectors i switched the cyl 1 injector with 3 and the misfire stayed in one

 

I would do like Pete said, and check compression on other cylinders. There might be a problem with just that #1 cylinder.

 

Good man, that means the problem is static, have you ran any propane around the intake manifold? Could have carbon on valves? What are the fuel trim readings left bank and right bank?
Weak valve spring? Cam lobe worn? WHATS THE HISTORY ON THE VEHICLE?

 

i dont know how to get the fuel trim... i dont know the history on the car i just bought it last month it had the misfire and the guys mechanic couldnt find the problem so he sold it to me for 1000. i know the car has been wrecked before because the airbags have been repacked and they didnt do 2 good of a job at that. its got 124k miles on it and thats pretty much all i know. when i got it i was really worried because it smoked realy bad under the hood, when i got it home i checked the oil and it was about an inch over the max full mark. so i drained all the oil and filled it to spec, and it hasnt smoked scince. but with the lack of oil pressure in the top end i dont know if it damaged it. the farthest ive gone is taking off the valve covers and visually inpected, while running, i didnt see anything out of the norm...

 

if it were cylinder problems wouldnt the misfire happen at idle and low rpm also?

 

Not necessarily. There may not be enough air and fuel in the cylinder to notice the problem at that time.

 

You will need an oscliscope next to see the firing line work.

 

I think i can help my 98 3800 series camaro was recently doing the same thing i changed out my whole ignition system except the coils and it still was happening I ended up buying the msd coil packs for the 3800 series and it cleared it right up. If you want the same packs i got they are on www.3800performance.com they are the msd blaster coil packs