1995 sunfire stumped

hello to all first post hope ya all can help me out , well here it goes

when I am at a stop I am getting like a misfire but it does not stall , or
as some may say ruff idle. lights in dash will dime a bit when this happens
,and more so when I have the heat on high.now things I have done to this
car,

put new injector in as other had a leak.

blower motor rely went ,and also come to find out that the motor had a dead
spot in it to (real impressed with having to get under there again):crying:

have changed the fuel filter

have put fuel injector cleaner in it

have checked for bad ground, dielectric grease on the batter posts

have had battery and alternator checked both are working fine .

system diagnostics done no falts detected.

new coil pacs later summer , but the ruff idle just started so don't think
it has to do with that

do any of you have any ideas to what I can do next to figure this problem
out ?
thanks in advance for any help that you ppl may provide

I have something similar happen, when my radiator fan kicks in.... car will vibrate some, and the lights dim a bit.

If your running hot, and the fan is having to kick on as soon as you quit moving, *shrugs*

Just my :2cents:.

Engine size would be helpful. Check plugs and wires. If no wires (2.4L), try replacing the plastic "cover" over the engine. Those go bad and cause a rough idle. I've also seen a failing ignition module cause that.

sorry for not posting engine size , is 2.2