i've got a 1993 honda civic ex the under the hood label say's it should have a d16z6 but ever since i've bought it came with a d15zi i believe is a non v-tec engine from a vx cause it say's it the valve cover it runs real good the only problem that when i took it for a california emmissions test it failed because to many hydrocarbons and unburned gas at 2500rpm's at idle is fine .i just wanted to know if the having a non-vtec engine is affecting it .i have a d-15 that is vtec can someone tell me if it's could be compadible with my car thank's for you're time .before i forget i've replaced the idle air control valve ,intake air temperature valve,o2 sensor and caalitic converter.

are you getting a check engine light and if so are you running the 92-95 p28 sohc vtec ecu. If that is what is running your car you will emmit to many hydrocarbons and unburnt gas at around 2500rpm being the d15z1 is running on 8 valves up untill then and the ecy is feeding fuel for a 12 valve setup.

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how did you make sense of any of that lol?

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97 civic ex coupe-D16z6 head-P&P-Skunk valve springs, retainers etc.-Skunk 2 Intake manifold w/Aem rail-Skunk2 Stage II cam-ARP Headstuds D16y8 block-Wisecvo pistons 8:6:1-Eagle H-Beam Rods-Blockgaurd-Stage IV XTD Racing Clutch-Emanage-T3/T4 .63 turbo

would my d15b v-tec work in my car

What d15 vtec do you have?

If it is a JDM D15B then yes it will work fine

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yes it's a jdm thank's for the help i will swap them an let you know how it goes in the test after thank's again .

No problem at all man, I responded to your email and if you have any questions at all please stay in contact with me as i am pretty sure I can help

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