Crazy wierd electrical problem

[GsxMan98]

Ive searched and searched but could not find even something close to the issue im having. First off the battery tested good but if i try to use any function in the car like lights or push in the brakes for brake lights everything in the car dimms really low and the starter relay will buzz and the fuel pump will turn on. If i turn the brights on it will the make the tach jump around crazy and all the gauges will start moving. If i let it sit for like 2 days i can go out and start it and it will start right up but then will go fully lean and then the fuel pump relay will start clicking really fast and the car will die then it will go back to possessed mode and the car will not start after that. So if someone could just point me in the right direction and its not the ecu changed that. This car is making me go crazy

And the fuel pump will turn on right when i put the key to on?

 

[97gst_spyder]

It sounds like a ground issue. I'd check all of them.

For the fuel pump, I have never seen a 4g63t prime the pump. Neither of mine does that stock wiring, and re-wired.

 

[GsxMan98]

It doesnt do it unless the car starts going crazy. I thought it was a ground issue but wouldnt it be going crazy all the time? Its not priming its just turning on.

 

[99BoostedRS]

I thought it was a ground issue but wouldnt it be going crazy all the time?

That's not entirely true it could just be a loose ground(s) and one second it has a good contact then the next it moves and it doesn't.

 

[GsxMan98]

ok ill go check out all the grounds and see what happens.

 

[97gst_spyder]

I have a short in the 'Engine' Fuse circuit (which controls almost all the engine sensors). Its an intermittent ground issue. But it will happen randomly, then gone as soon as I put a new fuse in (sometimes).

 

[GsxMan98]

To be honest what grounds should i check? Im a total idiot when it comes to electrical.

The ground from the intake manifold to the firewall wasnt tightened on the intake side tightened it and all problems went away.

 

[97gst_spyder]

Awesome!!

 

[GsxMan98]

Thank you for the help!!