1992 s13 KADE-24 (CGR relay is BUZZING)

[zero-six-s13]

Hello,I'm looking for a little bit of help in fixing my relay. It is the LIME GREEN RELAY located under in the under hood fuse box. I beleive it is the CGR relay.when the car is runing it stops, but as soon as i cut the power, it starts to buzz ( i have already changed it to a new relay )The trick i do to make it stop is dissconnect the NEG battery cable and it resets it. Once i run the car again and shut off it starts up again. i must repeat trick above

Please help if you can 'Thanks

[vancouverbc]

there are two green relays: egi and egi pump. egi is for fuel injectors and the one is for fuel pump.

Im not sure but this is a loose ground or a short that is not blowing fuse. have you done any work on fuel pump or injectors? double check your grounds.

[zero-six-s13]

thanks for the reply!

I have not done any work to the fuel pump while in my handle. As for the injectors, it may be possible the previous owner upgraded them, but im not sure.

So, you're saying it is grounding somewhere and not bloqing a fuse, correct?

What grounds do i double check?(i.e. Injectors and fule pump grounds)

thanks again fro helping me trouble shoot this issue, it is kind of embarassing popping the hood of my car to stop the buzzing each time i reach my destination.

[zero-six-s13]

bump

anyone other input will be usefull for me. Please let me know how i could trouble shoot this in detail

thanks

[vancouverbc]

is it the relay for fuel pump or for fuel injectors? if you dont have a digital multimeter there isnt much point. look up wiring in tutorial link in my signature.

[zero-six-s13]

I did a check by disconecting each fuel injector to find out wich one was causing the ground and i narrowed it down the the injector closet to the fire wall.

Coould it be possible that the injector is not flowing or working?

If the injector is not working, what caould have happen to my engine, as i been using it for thousands of mile like this?

thanks again, and i iwill be looking in to your links tonight.

zero-six

[vancouverbc]

Maybe do a search to see what causes buzzing fuel injector relay. The wring diagram calls it the eccs relay. I would swap another injector in, to see if buzzing stops. the computer is in the middel of all this so wiring diagram is not simple to understand.

Some people find it difficult to remove injector. See the tutorial link for fuel injector removal help.

http://img522.imageshack.us/my...5.jpg
Modified by vancouverbc at 4:25 PM 6/24/2007

[zero-six-s13]

Just checking back to say the problem still continues.

I have not tried swapping in a new injector due to finacial reason, but to be honest, My car doesn't run like it is missing fuel in one cylinder so i think it is electrical. Also, the buzzing stops when the car is on, so i think it works, it just has a loose connection somewhere. have you helped anyone else with the same problem as mine?

Van

can you quide me to finding the ground for the injector closes to the firewall?

each injector has its own separate ground, correct?

[vancouverbc]

they each have there separate ground and computer supplies the ground to each. the red wire is 12v+ for each injector. take note of the colour of ground wire on suspect injector and look up on diagram to see which terminal on ecu it goes to. check the resistance of wire when ignition is off. the resistance should be less than 2 ohms.

[RBbugBITme]

I have the exact same problem right now. I'll have to check the injectors. The battery died cause the relay was buzzing all night.

[wayner]

i have the same problem with my 240 the EGI PUMP relay goes nuts with the key in the on position but when cranking it over all of it stops what dose this relay go to so i could trace it to other stuff to make sure i have everything ok (wire colers and stuff).

[hkssupratt1994]

did any one ever figure out what this is?

[driftingmy240sx]

to fully understand this problem you may want to know how a relay works. one sude is a coil that is supplied a 12v and ground ant certian time decided by the ecu of igniton switch , etc. when the coil in the relay is "charged" it magnetically throws a "switch" that then supplies a ground or 12v to a component(s).

the fact that you hear it buzzing means the probelm is on the ground side of the relays "coil". trace that wire and you should solve the problem. you are probaly looking for a high resistance issue ot some sort of 12v back feed in the wire.

[hkssupratt1994]

it was the ground for the block to the firewall thanks man

[driftingmy240sx]

glad i can put my knowledge to good use. thanks for letting me know you were able to fix your ride.

[vancouverbc]

Why couldnt it be the 12v+ supply?

to fully understand this problem you may want to know how a relay works. one sude is a coil that is supplied a 12v and ground ant certian time decided by the ecu of igniton switch , etc. when the coil in the relay is "charged" it magnetically throws a "switch" that then supplies a ground or 12v to a component(s).

the fact that you hear it buzzing means the probelm is on the ground side of the relays "coil". trace that wire and you should solve the problem. you are probaly looking for a high resistance issue ot some sort of 12v back feed in the wire.

[driftingmy240sx]

because the majority of relays in nissan vehicles are ground side controlled. as in the coil portion oof the relay is constantly supplied 12v and has a switched ground to energize the coil thus trowing the internal pole of the relay.

[vancouverbc]

Wouldnt a weak 12v+ cause the relay to buzz when it gets a healthy ground signal from computer. either way the coil is receiving inadequate voltage.