Hey guys I just got my car running after the obd0 to obd1 swap on my 91 civic. Now the car starts and will idle all day no problems. But when I drive it or make the fuel pump work the fuel pump shuts off and the car dies. If I hurry and turn the key off then back on it will stay running. Every time it acts up I can turn the key off and back on and it will start right up. Could the main relay be getting weak if that's possible. I just recently installed a walbro 255. The main relay is original I believe. Not sure if this has anything to do with it or not but my heat gauge in my cluster does not work either and it did prior to the swap. Thanks

 

full pump stays on constantly.

doesnt matter about throttle position.

fuel pressure MAY be dropping under load, but its not like youre loading the fuel pump more under throttle.

i dont have any other advice, but hope that helps your troubleshooting.

 

Resolder the main relay.

 

I checked my cel and it reads code 41 and code 9. Code 9 is number 1 cylinder position sensor. I have read that can cause the engine to stall? Could that maybe be the problem? Also like I said if I turn the key off and on it fires up again. What would be causing this ecu or distributor or something in the wiring?

 

check timing.

and this thread may help. top of the list on google search btw.
https://honda-tech.com/honda-crx-ef-...t-fix-2562171/