Depends on how pronounced the jerking is. A misfire can definitely be characterized as a jerk.

It's like a very quick and light tap on the brakes. But shouldn't a misfire throw a code? Maybe not when it's only intermittent? And it get worse when the engine heats up.

a misfire should through a code, yes. When you turn your car to the accessory position, does the SES light come on at first? I've heard of people buying used cars where someone pulled that bulb.

I'm not sure how long you've had it, but it's always a possibility.

Since you've recently changed the wires, did you use good quality ones or a crap brand? It could have been defective. It'd be worth pulling the wire and reseating it, just to make sure it's on really good.

An intermittent misfire may not satisfy the conditions required for the P030x family of codes to set.

SES light comes on with key at prestart position yes. I used AC Delco wires. Wires are seated all the way and routed to not touch eachother and the surrounding stuff.

it's only 1 wire that is causing a problem, right? If you have your old wires, try switching that 1 back to see if that makes a difference.

The new wire could be bad....

Rechecked them tonight, again with a spray bottle. I get these sparks/arcings from several wires. Also at the coil and the wire between the coil and the distributor.
But I can't see them without the mist of water.

Did the test even one more time and there are arcing all over the place.
That makes me think that the wires maybe are OK, but that I got a different problem, that makes them arc.

Any developments on this? I am having a very similar issue.

I have still not found the problem :icon_doh: