So I was recently driving home when my car started flashing the engine light and started running weird when I got home I connected my obd scanner it was saying ignition coil 2,4,6,8 control circuit malfunction I did swap the 1,3,5,7 ignition coil to the other side but it still was reading 2,4,6,8 as malfunctioning? Anybody got a clue? I do have long tube header and it did get rid of 2 sensors I don’t got a tune yet to get rid of some of the codes

 

Check the INJB fuse.

 

The fuse looked fine

 

Something has damaged at least 1 wire or connection in your bank 2 coil harness. Time to get out the voltmeter and wiring schematics.

 

Was that before or after you replaced it?

 

I never replaced the fuse it didn’t looked burnt out when I checked earlier the car was working fine before

 

That's pretty much the usual deal that goes on RIGHT BEFORE something fails. "It was perfectly fine until it wasn't". Not hardly a useful data point.

​​​​​​​Then that could be your problem. Not saying "it is"; butt, until you put in a KNOWN GOOD one, you're shooting craps. (or blanks...)

 

bad ground possibly

 

Agreed, OP have you checked your grounds? Start with the ones on the back of the heads.

 

Yup check the ground. That Bank 2 Fuse powers the Coils as well as those Injectors on that side.

Injectors firing but Coils aren't points to the ground wire.

 

Okay thanks I’ll definitely take a look when I have some time kinda what I was thinking too

 

So I checked the fuses and the ground wires they both where fine I also checked the injectors they all read around 12ohms im I able to test the ignition coil harness?

 

Define check the ground wires looked at it or removed the the ring terminals cleaned ground and verified all the wire strands are not broken.
Reason I ask is these cars had have a problem with the wire strands breaking in the forward part of the crimp at the ring terminal and only kinda grounding where the insulation is retained on the rear crimped part.

Memories gettin rusty I had two of these cars come in reasonably low mileage in the one to 2 year old under warranty stage and found the below you gotta cut harness open to find it. The INJ1 and INJ 2 power wires run to each bank. It leaves the PDC as one wire for each bank then about a foot from the valve cover in the main loom there is a splice pack on each side. 1 wire comes in from each fuse then splits to 4 for the injectors and 1 for the coils then heads to the valve cover connector and splits to 4 after the coil connector to power each coil. on the valve cover on the coil side there is a soldered splice pack wrapped with duct tape. I found a problem at that splice pack cut it out re soldered heat shrinked it and away we went.

The other was a splice pack for 2468 in the harness same situation as above I wanna say once you open up the harness it's about a foot from the valve cover connector in the main loom.

It's either a ground or power supply problem.

Plug in a noid light at each injector verify it will flash on all 4. Start it up and unplug the connector on the valve cover and verify you have 12V present or not present at the pink wire

A quick diagnostic is run a jumper from the battery and splice into the pink a few inches away from the connector and see if problem goes away they start firing and smooth out. The tricky part to a lot of these electrical problems is that due to resistance incurred from the wire or connection failure you can show 12V with a meter but it will not handle the operational load. All it takes is one strand working to show you 12 V or even resistance to ground on ground side.

 

Any luck on repair?