P0354 P0352 P0650 Misfire codes
P0354 P0352 P0650 Misfire codes Man for some reason my ls1 likes running on 7 or 6 cylinders. I have consistently been getting P0354 and now I'm getting P0352 cylinder 2 misfiring as well.
Coils packs are good it deff seems like a wiring issue and is inconsistent. tore appart the entire harness and the wires going from the coils to the pcm look good. so I'm a little lost
Coils packs are good it deff seems like a wiring issue and is inconsistent. tore appart the entire harness and the wires going from the coils to the pcm look good. so I'm a little lost
Still having a problem with this. Cylinder 4 and 2 are misfiring. 2 is misfiring consistently and sometimes cylinder 4.
I think I found the issue. I changed the spark plugs on those cylinders even though they looked fresh just to be sure, and then I moved the coilpacks to different cylinders and the problem didnt follow. I think its just a loose wire somewhere. I opened up the whole harness and no broken/ bare wires.
The wires by the 10 pin connector that feeds the coilpacks are loose and I cant get them to stay consistently connected. I jiggle that part of the harness and I am running on anything between 6 and 8 cylinders. I was wondering if someone could post a pinout for that connector, or post where I can find on so I can figure out which wires feed 12v to cylinder 2 and 4.
I am thinking about clipping them then and jumping that connector with an aftermarket one.. one that hopefully doesnt suck. I understand it could also be a bad ground but I doubt each coil pack has an individual ground. I would think if I lost a ground I would lose spark to the whole side of the engine all together but I'm not sure.
The car runs great on 8cyl.. but with the engine shaking and vibrating its only a matter of time before it unsettles those wires and the car is bucking under acceleration and backfiring.
I think I found the issue. I changed the spark plugs on those cylinders even though they looked fresh just to be sure, and then I moved the coilpacks to different cylinders and the problem didnt follow. I think its just a loose wire somewhere. I opened up the whole harness and no broken/ bare wires.
The wires by the 10 pin connector that feeds the coilpacks are loose and I cant get them to stay consistently connected. I jiggle that part of the harness and I am running on anything between 6 and 8 cylinders. I was wondering if someone could post a pinout for that connector, or post where I can find on so I can figure out which wires feed 12v to cylinder 2 and 4.
I am thinking about clipping them then and jumping that connector with an aftermarket one.. one that hopefully doesnt suck. I understand it could also be a bad ground but I doubt each coil pack has an individual ground. I would think if I lost a ground I would lose spark to the whole side of the engine all together but I'm not sure.
The car runs great on 8cyl.. but with the engine shaking and vibrating its only a matter of time before it unsettles those wires and the car is bucking under acceleration and backfiring.
Anyone?
Seems like this would be a pretty simple common problem.. Hell I dont even ask about why my TPS reads 3% at idle, because I cant even imagine what would cause that but this I figured would be cake.
Seems like this would be a pretty simple common problem.. Hell I dont even ask about why my TPS reads 3% at idle, because I cant even imagine what would cause that but this I figured would be cake.
The weatherpack type connectors to my coilpack on that side were coming loose randomly. Surprisingly all the pins are just crimped onto the wire. I depinned the connections and threw a dab of solder on each pin where it connects to the wire and I havent dropped a cylinder since.
Still never figured out the 3% tps reading and no one really has a suggestion other than the obvious stuff which I've already tried.
Still never figured out the 3% tps reading and no one really has a suggestion other than the obvious stuff which I've already tried.
On The Tree
Joined: Mar 2009
Posts: 175
Likes: 1
From: shrewsbury, ma
i had a cylinder 7 misfire...swapped coils. still on cylinder 7...ended up finding that the wire that controls the coil to fire( the one that opens and closes the circuit to create the high voltage in the coil windings) had a constant 12 volts at all times...short to b+. the circuit works on that wire grounding then opening to create the large voltage spike u need to fire the spark plug.so i ended up runnin an overlay from the ecm to the big connector on the valve cover and fixed it. the wire obv had rubbed threw to a contstant 12volt wire some where behind the intake in the big wiring harness
