Hello,
i was on emission test and it read high HC (200-300) could it be that fuel is not burned in cylinder 2? any other things i should try?

Idle engine sound (idk if its okay):

Cylinder 1:


Cylinder 2:


Cylinder 3:


Cylinder 4:


Also the cable of the injector on second cylinder is like this (i "fixed" for now with isolation tape):


I also swapped spark plug from cylinder 4 to cylinder 2 and from 2 to 4 and it looks like this after 30 kilometers of 2500-7000 rpms from that problematic cylinder 2 :



Thx!

 

Run a compression test on all four cylinders... if they are similar and above 150 psi, make sure that the blue wire on the #2 fuel injector clip is repaired so it cannot be grounded against anything. Next, move the #2 fuel injector over to the #4 cylinder and then drive the car for a bit. Check to see if the rich condition has moved from 2 to 4. If so, get your fuel injectors cleaned and try again.

 

Thanks for reply
I ordered compression tester should arrive wednesday so will try that, also the blue wire is not touching anything other than electrical tape, and also when i disconnected that connector to fuel injector the engine was more "shaky" so it seems it "works" but maybe not as it should. Will try swapping them.
Also could it be for high HC that i also purchased this catalytic? https://bmcats.com/catalogue/details/BM91061/ i though it will works as the old one is cracked but it seems BM91061 does not works and should maybe try BM91061H, anyone tried that catalytic?

 

Your FPR (Fuel Pressure Regulator) is leaking. The vacuum line for mixture enrichemnt at WOT is connected directly befor 2nd cylinder. Extra (unmetered) fuel is being pulled from the rail and thorugh vacuum line dumped into onlet manifold in front of cylinder #2. Thta is why your plug on cylinder number 2 is dark and full of sooth.
Also, all of the plugs are a bit darkish (i.e. the engine runs a bit ritch).
How to be sure about FPR? Disconnect the vacuum hose line at the inlet manifold end and smell it; if there is a smell of fuel, that is it, you have found the problem. There should not be any of fuel smell there as though that hose only vacuum passes.
Now comes the fun part: FPR is NLA (no longer available) and I doubt you will be able to find a new one.I have seen some aftermarket ones of dubious quality;I am reffering to the original one made by Keihin. But, any FPR will do as they all operate at 3 bar pressure; you will just have to get an adapter machined to suit the one you have/can obtain.
Hope this helped

 

Thx @Wile E Coyote
Anyone can find part number for good FPR? :D
Also found this one https://www.ebay.com/itm/296060405902 - Fuel Pressure Regulator PR4068 For Honda Acura Civic 92-01 (3 bar)

This is how i have it right now (i bought it as is and now trying to fix what was told to me "no problem great engine") :

also it looks like the "cap" on that fuel rail is little damaged at ends

 

This is the original part number: 16740-P2A-003

 

thx
so based on this it seems like this is also it? https://www.ebay.com/itm/174952510849 - Herko Fuel Pressure Regulator PR4147 For Honda Civic Civic del Sol CR-V 3.0 Bar

and also on aliexpress PR4136?

 

Hello, so i checked the vacuum hose and there is no smell of fuel and also seems dry inside, and i also tried that ecu reset via backup radio fuse, also any part number which i should order for o-rings for injectors (better have them when switching them) ?



and also this is the spark plug from that second cylinder after another cca 30-40 km