A few days ago my 1996 T100 began to shake especially at low rpms and when idling. The check engine light came on and when I checked that out it said misfire in cylinder two. I replaced all the spark plugs and just changed out my wires not so long ago as well. This happened once before about a year ago and I replaced all the plugs and everything went back to normal however this time the shaking still happens. The only thing I can really think of is a bad fuel injector but really have no clue. I'm all out of ideas so any help would be appreciated.

did you replace the rotor in the distributor?

no rotor/distributor cap on the 3.4, you could try the coil pack to see if that one has gone bad...

I had the same thing happen recently. It was a broken vacume line, by the firewall, drivers side up near the hood. It was hard to find. Found it in the dark with a flashlight. The engine torq finally broke the line away from the hard line. Hope it's that easy for you. Good luck.

If it consistently says cyl 2, then I'd suspect an injector. Check the electrical connection. If it was the coil pack, it might randomly indicate 1 and 2, but its still worth trying because its easy. Just swap it with one next to it and see if the problem moves. Plugs too, but you already checked that.

it could be a blown head gasket. mine did the same thing with one. are you losing any coolant or having any funky smell coming from the exhaust? if so it could be a blown gasket, head, block??? i've had a blown gasket and head with mine before. if not that, change your plug wires around like mentioned if the code gets thrown to the other cylinder you changed it with. i've also had plug wires go bad in under 6 months before. and if not your plug wires then maybe its the spark plug it self, you could also change that around to see if the code changes. you can check the injector by putting a screwdriver against it, then with your ear on the other end to listen and see if it's still working. i've had to change all of these before(i've have bad luck with my truck ever since i've owned it <img src="/forums/images/graemlins/lol.gif" alt="" />)