about a week ago i misshifted my car and bent some valves in the head... i did a compression test and all were 230 except number 2 which had 15.. anyway im gettin cel 72,73,74 which is cylinder number 2,3,4 missfire. the car runs still a lil shaky at idle and a lil loss of power. but what could be causing the cel for # 3and 4??

 

Maybe #2 is so bad that its throwing the others off. The O2 sensor is seeing the result of #2 bent valves, but trying to compensate it screws up the mixture for the others. So sometimes they misfire. I wouldn't be too paranoid about them until you get #2 fixed.

 

this happened to me couple months ago. try changing your wires/spark plugs. also, check for corosion in your valves.

 

Results for code: 72

Manufacturer Description
Honda - Engines: 1.5L - (D15B1, D15B2, D15B6, D15B7, D15B8, D15Z1) 1.6L - (B16A3, D16A6, D16Z6) 2.0L - (A20A3, BS, BT, B20A5) 2.1L - (B21A) 2.2L - (F22A1, F22A4, F22A6, F22B1, F22B2, H22A1) 2.3L - (H23A1) 2.7L (C27A4)
Description: Misfire Detected; Cylinder No. 2 or Random Misfire

Results for code: 73

Manufacturer
Honda - Engines: 1.5L - (D15B1, D15B2, D15B6, D15B7, D15B8, D15Z1) 1.6L - (B16A3, D16A6, D16Z6) 2.0L - (A20A3, BS, BT, B20A5) 2.1L - (B21A) 2.2L - (F22A1, F22A4, F22A6, F22B1, F22B2, H22A1) 2.3L - (H23A1) 2.7L (C27A4)
Description: Misfire Detected; Cylinder No. 3 or Random Misfire

Results for code: 74

Manufacturer
Honda - Engines: 1.5L - (D15B1, D15B2, D15B6, D15B7, D15B8, D15Z1) 1.6L - (B16A3, D16A6, D16Z6) 2.0L - (A20A3, BS, BT, B20A5) 2.1L - (B21A) 2.2L - (F22A1, F22A4, F22A6, F22B1, F22B2, H22A1) 2.3L - (H23A1) 2.7L (C27A4)
Description: Misfire Detected; Cylinder No. 4 or Random Misfire