Hey guys, my z28 has been idling very very rough, can feel in steering wheel and entire car. My entire ignition has been replaced, plugs wires coil ICM and opti are all new. My fuel pressure is right at spec. I'm not really sure what to check for next, or if there is a common issue with this. I did listen to my injectors with a stethoscope and most seemed to be different volumes but no odd pattern to them clicking. I'm wondering if they could just be weakening or if I should check some sensors out before putting injectors in it.

 

Broken motor mount???

 

I don't think so, not going to rule it out but I can actually hear the engine missing

 

Just the other day after filling up mine started idling really rough to the point that every time I hit a red light I would place in neutral and rev motor. It almost felt like I was running on 5 cylinders then when I got onto the freeway I gave it the gas and then it felt like what ever was clogging what gave loose and has been running great since. Might be clogged injectors.

 

Is it just a rough idle or is a miss ??? does it miss when your driving down the road??
I'm assuming it runs fine while you are driving the car you second post has me confused . sorry
Does it make any difference if the engine is hot or cold ??
Maybe a bad temperature sensor or the idle control valve ??

 

Its a very rough idle, park/neutral is a little rough, when its in drive and you stop at a light its even worse, it sounds/feels like its down a couple cylinders. When you give it gas its smooths out and sounds fine. Temperature does not seem to have an effect on it

 

Go to shoeboxes site for checking codes.My money is the map sensor.My02.Paper clip time.

 

I tried that and could not get any codes to flash other than the first one tha always does, map sensor was also what I was thinking too