stranded need some quick help please buzz noise from radio area

[blackhawkgsx]

hey guys i need some quick advice i was driving today turned off the car and when I attempt to turn it back on I just get a buzz noise from the radio area the starter does not crank over or anything . no fuses are blown thar i can see car has a new starter and battery . any ideas ?

 

[daddyo]

MPI relay/fuse, Bad ECU?

 

[blackhawkgsx]

I have narrowed the Buzz noise down to the I guess its the starter relay MB398020 and the MPI relay E8T08474 ... I tested the mpi relay pin 5 & 6 for resistance but nothing shouldn't I get 90 ohms? how can I test the starter relay ?

Brand new Ecu I check for any leaks/Burns and nothing...

 

[19Eclipse90]

For S's and G's, how do your battery connections look? Starter connections? Are they free from corrosion and tight/snug?

 

[daddyo]

I have narrowed the Buzz noise down to the I guess its the starter relay MB398020 and the MPI relay E8T08474 ... I tested the mpi relay pin 5 & 6 for resistance but nothing shouldn't I get 90 ohms? how can I test the starter relay ?

Brand new Ecu I check for any leaks/Burns and nothing...

Not sure what they should read as far as resistance but they should click on when engaged so you should feel or hear it. You might do a search on here for mpi just make sure you highlight Titles only under all posts.

 

[blackhawkgsx]

Got new battery terminals and they look clean, as of now the buzzing stopped and only clicks when the key is turned. At this point I think it maybe the ignition switch but not 100%

 

[SubversionX]

The ECU wouldn't matter with the starter turning over. It does with the MPI/Fuel relays, however. Have you checked your starter relay to see the sending voltage from it? check out the electrical user guide; if you don't have it, you can find it on Scribd.

So for now, don't worry about your MPI/Fuel relays or ECU. Just make sure that the starter relay is 'relaying' power to the starter. Also check the clutch safety switch (I believe this is a green wire with a black tracer) to the starter relay.

 

[steve]

What's the current battery voltage at rest, and when trying to crank?