Oh its 2ga then.And the o2 wasnt a problem previously. The check engine light wasnt coming on and there was no information telling me my upstream o2 was bad until I fixed the misfire. I found this out and already replaced it. I will be fixing the exhaust before I go any deeper into the...

Idk what 2ga and 2gb means? I do have schematics. Have determined it's a loose/broken wire somewhere between as it is back to an intermittent misfire problem.Let me step back and explain what I did; So found that plugs 2 and 3 were not getting spark. Replaced that coil, misfire still bad...

Yes I replaced the one coil suspected to be bad after the swap and corrected all the connections. By working back to the ecu to check for faults I did mean to insinuate I'll be checking the wiring back to it to see where the fault is, to see if we find a bad wire or bad ecu. Have verified no...

No codes. Misfire is immediate, once I convince it to start. It has an extended crank and sometimes takes a few tries to turn over.

Got it to my work and my guys started testing everything. Found that with the new coil on the right, plugs 2 and 3 are firing again but now 1 and 4 are dead (that coil was firing before). So further testing shows not getting ground power to the transistor for that coil. Since 1 and 4 were...

Got my new power steering reservoir from STMtuned.Had to paint it purple to match everything else if course. No more leaks!!!As far as running.....still major misfire. Installed new wires, coils, and the transistor and the misfire is worse. Put the old transistor back on with the new...

Well as usual more answers leads to more questions. I swapped my coils; much easier than I anticipated btw. She runs worse and dies the second I hit the gas pedal. Pulled the plugs. Before plugs 1 and 4 were clean, and plugs 2 and 3 were black. Looked like soot. Now plugs 1 2 and 4 were wet...

Oh ok that makes sense to swap and test. Also been reading that the transistor/coil module is a common failure for only 2 cylinders working too. More tests for this weekend looks like!!

Yes used an inline spark tester. Plugs 1 and 4 did nothing. Plugs 2 and 3 lit up like Christmas trees. Plug 1Plug 2Plug 3Plug 4

More answers!! Decided to retest spark since I was not the one who did it when I first got it and suspected a misfire (mechanic friend) and now that I've fixed up the fuel system. Guess what? Plugs 1 and 4 are clean cause they aren't seeing any action! So....opposite of what I thought was going...

Will do that tomorrow!! I should also add, when I hit the gas the boost gauge went from vacuum to 0 and then backfired. After doing this a couple times it died.

Really? Good to know.Cleaned the plugs and IT RAN!!! Definitely misfiring but not throwing a check engine light. Pulled the plugs again after it ran. Now to find the source of the misfire.Also found the source of my power steering leak; solid drip pouring out the bottom of the...

More research. Pulled the plugs to see what they look like after getting it to turn over. These are brand new plugs with maybe 50 miles on them. Not what I wanted to see but I'll clean em up and refire to see if I get same or new results. Top to bottom in the pic are plugs 4 3 2 1

Modified the timing cover so it fits with the new fitting on the fuel rail. Tested the coolant temp sensor. Either I did it wrong (only second time using an ohmmeter and I'm still not confident I did it right the first time) or it's bad as it read 0.0 ohms sooooo.......that's where it sits for...

I have not yet. But that sounds like the next thing I should check. Thanks!