Code 1 indicates a problem with the O2 sensor or the fuel pressure regulator, though I don't think either would cause specific failure of cylinder 4. Nonetheless, here's how to determine whether code 1 is in fact indicating a problem and, if so, what the problem is:

 

I don't think a fuel injector is the problem because, based on my understanding, the main and auxiliary injectors of the dpfi system each control two cylinders, with the auxilliary injector controlling fuel to cylinders 1 and 2 and the main injector controlling fuel to cylinders 3 and 4. Therefore, if one injector was bad, I think you would have two bad cylinders rather than one.

If dead cylinder 4 is caused by a fuel problem, then I think a more likely cause is the ECU or the wire between the main injector and ECU terminal 7, which controls fuel to cylinder 4 (for troubleshooting see diagrams in post #13 in this thread ).

 

okay ima try the test see what happens in the morning thanxs ill let u no what happens hopefully i can skip the volt testing i dont hav volt meter with me

 

do i hav to do all the steps or jus reset the ecu

 

You can purchase a basic digital multimeter for about $15 (Sears, Walmart, etc.). This is an essential tool for troubleshooting.

 

Regarding code 1, just reset the ECU, and then run the car to see if code 1 returns. If so, troubleshoot as detailed in the diagram. Here's how to test the fuel pressure regulator:

 

By the way, you really should download the 1988 Civic service manual (Added May 15, 2008) from this website:

https://www.spoonhonda.com/SearchResults.asp?Cat=119

All the diagrams and information that I have posted for your Civic have come from this excellent manual.

 

i was sure i new which fuse to pull but now im not lol weres the harzard fuse located before i pull somthn im not supose to

 

thanks i downloaded it ima try n look for some things myself thanxs man for all the help one question wat if the 0xygen content to cata doesnt turn out to be the prob wat else uthink could be going on

 

out of curiousity ...whats supose to happen when u disconnect an injector cuz i disconnected the main when cars running n nothing happend ...i re connect it n go to disconnect aux.injector n the car wants to die so ima head to the wrecking yard right now to grav a main injector