Electrical Problem

[bravekozak]

I sure hope your ROOM fuse was a 10 AMP (red) fuse and protected your ECA when the MAIN fuse link melted.

The injectors get their power from the EGI fuse link through the main relay (Y/BK). They ground through the ECA (GN/Y & GN/BK). That's how they know when to turn on and shut off. Check out that circuit.

I am only assuming that your main relay should work because your fuel pump relay is working.

[jbrown]

It was a ten amp and it didn't go which makes it hard for me to believe the ECU fried. How would I go about checking the EGI circuit? It is good out of the fusible link box. But I am not sure where to check past that.

[defprun]

The only time I had an issue with these fuses was when my main harness under the rad support shifted and the rad support cut into the harness.

[jbrown]

No I don't think that happened nothing is cut or rubbed that I can see.

[bravekozak]

Main relay is down low behind the R/H headlight. Look for the Yellow/Black wire. The test light should come on when you crank the the engine.

[jbrown]

Yeah all the wires on the relay are hot.

[bravekozak]

Help him out guys. He says he has spark. How can we prove the injectors are squirting gas? and the ECA is doing its job? without an ECA tester. Otherwise his engine should start.

[jbrown]

Nope there is not any spark. However the fuel pump is kicking on. If I don't have spark nor that check engine light on on showing that the ECA is communicating, and it is getting power isn't it the ECA, I just don't understand how it fried before the 10A ROOM fuse.

[bravekozak]

When you turn the key, check to see if you get power to the BK/W wire on the positive terminal of the ignition coil.

[bravekozak]

Maybe the check engine and parking brake bulbs are burned out.
Before we undo the speedometer cable, remove the cluster bezel and pull the instrument cluster out to check, we must check for spark.

[nitrofarm]

He already said he can hear the Fuel pump running thats the main relay working correct?

[nitrofarm]

Man I'm confused I thought you said the last time it cranked and had spark. Maybe your ICM has failed. Check for voltage like Brave said at coil input.If no power work backwards towards ICM & hopefully thats all that failed.

[bravekozak]

Yes the main relay energizes in RUN and supplies power to the fuel pump relay, crankshaft position sensor and injectors. It is very important.

[Jblair]

Plug your PCM sti wire to ground and try to start it. I had a big issue with my electrical, i grounded the PCM and it started. Same deal as you. Just try it, it may do nothing but it may work and its easy.good luck.

[jbrown]

Where is the PCM sti wire? And there is twelve volts going to the coil which is weird that it wont start, and I do not think it is the ICM because the computer is not communicating (according to the little light in my dash.). So it is not getting the "You should spark now" Signal. From the distributor from the computer. If thats the way it works.