Bought an 89 civic dx with an lsvtec from a guy, it had a spun rod bearing so i pulled the motor and just but a b20 in it for now just to drive. Well i got the swap all done but here is the problem..... it turns over and starts and wont run for very long.... then some times it wont even start at all. i have done everything i can think of and still cant find whats wrong. if any one can please help it would be great....


it is getting spark & fuel for sure!


as for the car:

89 Civic DX
B20B engine
OBD0 to OBD1 harness
P75 ecu
New OBD2 Distributor (had another distributor with an MSD blaster SS coil & 6 AL box) (not on car now)


everything else on the car is stock. Thanks!







Modified by 90 Si Hatch at 1:07 PM 7/16/2008

 

check your timing

 

it wont stay running long enough to check the timing

 

bump

 

get the marks setup right... and see if that does it then check the timing.

 

i think its something in the wiring with the Main Relay, cause it has an arattic clicking coming from it... i have tried 3 different main relays and it does the same on all 3. I guess ill have to start ohming the wires???

 

clicking is normal...if everythhing else is checked/replace....it's your grounds, probably loose somewhere find it and fix it! Check or replace your negative terminal/ground wire and check your other wires/ground because it can do that

 

I agree, and also it can be the fuel injectors themselves, or more likely the wiring from the ECU to the injectors, especially if it was added (DX originally) Ohm out the wires from the ecu to the injectors, then from the injectors to ground. Anything over like 1 ohm in a wire will cause problems. Also I had a friend with an OBD-1 conversion harness whose car was doing exactly the same thing, startup and run great for 3 seconds, then it would shut off like you turnt off the switch. It turned out that the conversion harness was bad itself. We got another one and it fixed the car. Tried the harness on another car and it would not run either. Good luck.