So i just bought a 92 civic with a d16z6 swap from a guy a couple days ago and everything was fine until i gave it wot for the first time. It went through the lower RPMS fine but after 5 grand it would start to stutter... I Chocked it up to not paying attention to the redline... I parked it to go into walmart n when i came back out it wouldnt start. It would turn over, run for a second then stall. I couldnt even keep it on by holding the gas pedal down... After about 10 attempts it started back up like nothing happened... So later i tried wot again and the same bucking happened. Half throttle n its ok though... fuel pump, filter or main relay?

 

Anybody seen this before?

 

It does sound like starving for gas, so changing the fuel filter would be a reasonable thing to try. With swap jobs you need to do a survey and find exactly what parts you have in terms of the ECU, etc.

Always resolder the main relay as a preventative measure. Main relay problems usually mean that it won't always start, but once started it will then run OK.