1992 Honda Accord no start and trans trouble code pop up

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also discovered, i checked the fuel and throttle body and all seems ok but loosend the fuel line to the fuel rail and re-tightened and fired right up until i shut it down, then i have the same problem until i loosen the fuel rail line and retighten (sample on picture) again then fires right up. Thinking this could be the fuel pump, but can also bu the fuel filter. when do you think, i'm kind of in a budget and fuel pump is expensive. thanks

Discovered problem. I have read on numerous honda sites that the Main Realy from honda factory was not so great and due to high heat can and will cause cracking on the soldering which creates bad connections. So I decided to check mine. After evaluating it, guess what, there were cracks on 4 connecting points on the soldering. Removed old solder and resoldered, re-installed, re-set computer again and blamo. Started right up. Wanted to make sure so I would shut down re-start about 5-7 times and started everytime with no issues. Re-checked again this morning a couple of times and no issues. Also no more d4 blinking or loss of fuel to fuel rail. Will check if any fault codes after work and check start up as well. Will keep you posted on result.

Well guess what, no more starting problems or trouble codes. Honda sure don't make it easy to find a direct problems with either fuel pressure and or transmission. All tied together to this little solder problem on the main relay (which is located right underneith the cruse control box under the driver side dash). All this could have cost me hundreds to thousands and never solve the problem if this main relay was not discovered. All it took was a new roll of solder (5 bucks) and about 15 minutes of your time to fix 2 major problems. My guess is that if any problems with electrical, fuel or transmission, I would first chaeck the main relay for any cracks on the soldering. Huh, go figure.