itsLOUiSduh

okay so i just installed a LS motor into my 95 civic EX and it just keeps cranking with no spark. when i turned the key to the on position i dont hear any noises like you usually would like as if the fuel pump turns on or whatever.. starter is brand new and distributor is fine because i swapped with a friend's and his works fine but i get the same problem like when i had my distributor in there. after checking around the motor and the inside of the car . my power door lock, sunroof and power windows stopped working. i checked all my fuses and they are all good. have no idea what any of these problems could be .. please help me..

Former User

Start by checking whether the important ground wire attached to the thermostat housing is loose or connected.

itsLOUiSduh

yeh my ground wires are good..

Former User

When you turn the key to ON(II), does the CEL remain ON or turn OFF after 2 seconds?

Former User

For the windows, locks, and sunroof, check whether fuse 36 (50A) under the hood is blown.

itsLOUiSduh

Check engine light remains on but whenever i try to check the code it doesnt flash or anything..

Former User

This is called code 0, which indicates a problem with the ECU or its circuit. Is fuse 31 under the hood blown? Is fuse 18 or 24 under the dash blown? Does disconnecting the MAP sensor or TPS make the CEL turn OFF? Otherwise, the ECU or its wiring may be bad. It really sounds, though, like some engine ground wires is disconnected, loose, or bad. Triple check carefully.

Regarding the other problem, is fuse 36 blown?

itsLOUiSduh

31 is still good.. i havent checked the 36 yet. but can you get me a diagram of the fuse numbers under the dash please. i checked my fuses yesterday and they were all good.. the ECU i have is a obd1 pr4. im gonna go and try to disconnect map and tps now.

Former User

itsLOUiSduh

fuse 36 is indeed blown, 31 is still good. under the dash, fuse 18 and 24 are both good.. i used jumper cables and put on end on the negative terminal and the other end on the motor just to use as a quick ground and it still didnt do anything. triple checked my original grounds from the harness and all are plugged in. disconnected TPS and MAP and still got check engine.. i searched around and saw that pr4 ECUs are for obd0 or obd2 LS but why does my OBD1 harness plug into the PR4 ECU that i have??

Former User

Other members will be able to tell you whether the PR4 ECU is compatible or not. Do you know anyone who will let you borrow a known compatible good ECU for testing?

itsLOUiSduh

im gonna try and ask around but the kid i got it from said it was for a ls with obd1.. is 92-93 obd1 or 0?

Former User

I believe that they are OBDI. Someone please correct me if I am wrong.

itsLOUiSduh

if it is obd1 then i am good to go lol. i checked from another site and they said PR4 is for 92-93 LS and its OBD1

Former User

The question now is whether the PR4 ECU that you have is bad. A swap with a known good PR4 ECU should tell you whether your ECU is the problem.

itsLOUiSduh

car still doesnt start!! i checked the main relay and its clicking.. for ***** and giggles i even replaced it with my brothers and im still getting the same problem. someone help me please