93 civic eg sedan. engine cranks but wont start

[Mooola]

my civic trips sometimes and i need help. sometimes the fuel pump would prime and sometimes it wont. my buddy and i checked the wires under the back seat and there was no voltage coming out from one of them. anybody knows if thats the cause of the problem?

 

[mymmeryloss]

Main relay? Any cels? What car? Engine? Any other symptoms?

 

[AlaskaB16]

^^^^


Your fuel pump gets it's power from the main relay. Google " civic main relay" and you'll be showered with photos and how to's.

 

[RonJ]

Start here:

http://techauto.awardspace.com/mainrelay.html

If the main relay is fine, then you may want to try swapping in a known good ECU.

 

[Mooola]

my engine is a d16z6 and we already changed the main relay and spark plugs a few days ago. we started with resoldering it and it didnt work and ended up buying a new one. I also made a bad decision of bringing it to a mechanic and he changed the engine distributor, and my friend told me that it has nothing to do with it. so i decided to fix it on my own with some help ofcourse. but still no results;c

Also whats a cel? Also whats an ECU? this is the first time i tried to fix my car

 

[AlaskaB16]

When people spout off things you don't understand, google it. It's faster, will include pics, and will make this trouble shooting ordeal MUCH faster for you.

CEL = check engine light
ECU= Electronic control unit = your cars computer

Go get a repair manual with a wiring diagram in it. They can be found at any auto parts store. It's a MUST HAVE when trouble shooting wiring problems.

 

[Mooola]

ok thanks. when the fuel pump wont prime the cel turns on. also my last bet would be the ecu. thanks for the help people

 

[RonJ]

also my last bet would be the ecu.

How much experience do you have with 5th generation Civics? You shouldn't be surprised that it's becoming more and more common for 20 year-old ECUs to go bad. However, first clean and tighten the G101 ground on the thermostat housing. If you get no joy, then swap in a known good ECU.

 

[Mooola]

How much experience do you have with 5th generation Civics? You shouldn't be surprised that it's becoming more and more common for 20 year-old ECUs to go bad. However, first clean and tighten the G101 ground on the thermostat housing. If you get no joy, then swap in a known good ECU.

i have been asking people around and checking online. this is a car that my dad gave me a few months ago and i wanted to try my hands on fixing it by myself. its been running fine recently but i just wanted to make sure that it wont act up when im going somewhere

 

[RonJ]

i have been asking people around and checking online. this is a car that my dad gave me a few months ago and i wanted to try my hands on fixing it by myself. its been running fine recently but i just wanted to make sure that it wont act up when im going somewhere

If the problem recurs, remove the front passenger kick panel to expose the ECU. There's a sticker/label on it that tells you the kind of ECU you have (e.g., P28, P06, etc.). That's the type of ECU you need to borrow from a friend for test purposes or to buy. When purchasing, also buy an ECU that matches your transmission type (manual or auto).

 

[Mooola]

allright man. i appreciate all the help. ill come back when something happens. peace

 

[integraguy_3]

However, first clean and tighten the G101 ground on the thermostat housing.

Check this..

 

[Dragula92civic]

ok this has helped me out also...