All 3 cylinders on driver side not firing

[Twin_Turbo_300zx]

I recently replaced all of my injectors, my head gasket, timing belt, water pump, intake mani gasket and some other gaskets and misc parts.

The car ran alright for a few weeks then had a weird loss of power there was a small fuel leak I fixed the leak and nothing changed.

I recently discovered the ecu was throwing a knock sensor code, I had connected the Knock sensor to the wrong plug so I swapped the plugs. The car ran slightly better but not right. There were no codes after that.

I decided to check and see if all of the cylinders were firing and discovered all 3 on the drivers side were not firing. I replaced the ptu with no change. I am going to ohm the injectors, check for power to the injector and check for spark on all the coils but with all 3 not firing I see there being a problem elsewhere.

Any help or suggestions on what to try would be great.

Thanks in advance!

[evildky]

with all 3 ont he same side being an issue it could be a woring issue, but first step si determine if it's a spark or fuel issue

[Twin_Turbo_300zx]

Well I quickly checked to see if there was no spark or no fuel and both looked fine. I tested voltage to each injector and each coil and I checked the injectors them selves. I am thinking maybe somehow the valves got messed up or the timing belt slipped a gear. That or somehow all 3 of those cylinders rings are having issues at the same time or all 3 coil packs went out. I am going to pull the plugs and do a compression test asap. I will swap the coil packs to the other side or test them while they are out.

If anyone has suggestions please let me know.

[evildky]

but you haven't verified spark yet? why would you jump to physical engine issue without ruling out spark first? spark is a much mroe likely issue, unless you are 100k on the timing belt or someone who doesn't knwo how to instal the tensioner put the belt on

[Twin_Turbo_300zx]

I wasn't ruling anything out yet, I mentioned I planed to test the coils. There is power going to the coils and seeing as all three cylinders on one side are not firing, I was thinking it could be a valve issue. I am no pro mechanic I am just trying to trouble shoot the problem as best I can. I triple checked everything with the timing belt and installed a new tensioner but mistakes do happen and so do weird mechanical issues. I have installed timing belts no problem before and as said I triple checked my work.

I will check everything as far as ignition goes asap I just didn't have any tools yesterday when I checked voltage and ohms to the ignition and fuel system.

Out of curiosity what does "100k on the timing belt" mean? Do you mean 100k miles? I mentioned in the first post I installed a new one while doing the other work.

I appreciate your input thank you.