I have a stock 98 camaro, v6.
i have replaced plugs/wires and coilpacks and fuel filter
it used to be only on #3 but now its on all of them right after i seafoamed it.
if im slightly on the gas it seems fine ...if i get on it the slightest bit hard it starts messing up (jerking, not wanting to go at all, etc.)
has a rough idle

id really appreaciate all help.

 

Is SES light on or flashing? Scan it for codes If you have changed all that, double check to make sure that the wires are on the right plugs and that none of the plug wires got into the manifolds and melted. I haven't messed with seafoam and don't know if that could have messed with the injectors or not.

 

check your fuel pressure.

 

CEL is on, flashes at times im sure plugs are on the right spots.
also a mechanic said i have a vaccum leak. he never said where though. could that cause misfire?
i dont think its fuel because i got fuel coming out my exhaust.

also, wont rev past 3000 rpm if you step on gas.
but if u ease on the gas you can get it higher.

 

check your egr, fuel pressure regulator and the evap system.

 

how do I check these ? i'm still learning some things.

 

pull the vacumm hose off the fuel pressure regulator and see if its got gas in it or smells of gas. check what shbox has, heres the part on egr valves.
http://shbox.com/1/4th_gen_EGR.html
not so sure on the evap for your yr and model. this is what i have for mine. the 6 and 8 are similar not exactly the same. but yours is a probly 3.8 and alot of things change so it would be a good idea to check it out on a search.

 

i appreaciate that man. ill try n get this done today.

ill let you know what i find

 

icm? crank sensor? seafoam wont hurt anything.

 

try this found it looking at other sites.
http://www.camaroz28.com/forums/showthread.php?t=601565