i have an obd2 b series swap into a 5th gen that refuses to start. the car only sporadically primes the fuel pump and kicks the relay, but it does do it sometimes. if i dont connect 'd' to my ecu, it will kick and prime every time. if i plug in d, i will turn on neither the fuel pump or the main relay, and it prevents anything to go to the dizzy. without 'd' i get both f uel and spark, but it wont start. the car is also throwing a cel code 4, for crank position sensor, but i just replaced the dizzy with a brand new one and it didnt fix the problem. i assume its a ground or bad connection somewhere, but i rechecked all my grounds and everything seems to be in order. yesterday, all i had to do was shake the clips on the passenger side shock tower to make the relay kick over with all 3 plugs in the ecu, but today that doesnt work.

 

you've all eady located the problem. Shaking the shock tower plugs are a dead giveaway that you have a falult connection in the plugs or a wire that's broken.

Try cleaning up all the connections in te connectors at the shock tower. If that's doesn't help try wiggling individual wires before and after the plugs.
It will take time but you will find the problem.

 

does anyone know which wire on plug d would cause it to short out the rest of the ecu? because when i unplug d, the fuel pump primes and the relay kicks, but when i plug d in, it cancels out both of those. the only wire that even looks like it could do that is the sensor ground on d22

 

bump for any ideas>?