Soo lets see, did about 512 buck's worth of work to my car. Had new acdelco wires put on, autolite plugs, pcv valve, fuel filter, new freaking fuel injecter gaskets, and did a full fuel inject. clean. Car wasnt really running all that great when it was does. couple days later engine light came back on, damn it! and It was blinking! ugh another damn misfire happening. Soobrought itback to the place where I hadthetune updone. Hadthem scan it with a reader, damn EGR valve problem, and cooling sensor came on too. Any know how much to clean the damn thing? will seafoam do it? I hope its not bad. My car is running pretty ****ty =(.

 

What engine do you have and how many miles on it?

 

crap sorry lol 3.8L N/A 85500 miles on it.

 

When the ignition coil packs strart to go you also get that problem. Can just be one pack also any mechanic can check them easily.

 

Check the coil packs, and the ignition module....but I would bet if it is the EGR valve, if you're misfiring you may be too late to clean it, and it may need to be replaced. Like DEI said, the coil packs are pretty easily checkable as well as the ignition module.