Hey guys, Im in need of some serious help...heres the story:

A couple of days ago I hit a raised patch of pavement on the street. The impact was fairly small, around 8 mph or so. I knew it was there but couldn't avoid it because there was a lot of traffic that day, so i couldn't swerve out of the way. I knew it was going to hit but did not expect these sort of problems.

Immediately after the hit, the car shut off and i rolled to the side of the street.
EPS, ABS, and SRS lights starting flashing (giving codes) with the car OFF and key in ON position.
Car would crank but fuel pump would not prime and car would not start.
I left the key in the ignition in the ON position, and after 30 minutes of waiting, fuel pump started priming. I knew this would mean the car would start, and it did!
Once i started it, the car ran really rough, as if on 3 cylinders.
Made it home, parked in the garage.
Left the key in the ignition in ON position, car off, to see if anything would happen like it suddenly did on the street.
Sure enough, with the key in the ON position, car off, the car went crazy! ---> EPS, ABS, SRS flashing, as well as fan kicking on and off, EPS box clicking, Main relay buzzing, RPMS would go from 5K to 3K and back up to 5K (Meanwhile, the CAR IS OFF)
Decided to take the key out of the ignition to stop the madness.

Lifted the car up, i thought i shredded some wire underneath the car.
Turns out, the impact was to the subframe, nothing big at all.
I cleared the EPS and ABS codes, did the center relearn for the EPS and light went off. The ABS code was right front wheel sensor, but i did not check that because its not my main concern right now.
I noticed that the fuel pump does not prime, and car still does not start.
While i was checking under the hood, i heard a sort of hissing, clicking noise, intermittent. It seems like its coming from around the firewall by the back of the valve cover.
Went inside the car, pulled the main relay out, the noise went away. Plugged the main relay back in, starts making that hissing sound again.

The car has AEM EMS so i cannot pull codes, however, i found it a little strange that the car was throwing the EPS and ABS codes without jumping PIN 4 and 9 in the ECU. They started flashing codes immediately after the impact.

Any help would be greatly appreciated...this is driving me nuts. Car was driving and running so smoothly before this happened, its a damn shame

 

Check the ground connections?

 

I checked all the fuses but i have not checked the grounds. Im not too sure on where they are located...

 

I also checked the harness on the right side of the car, and any connections to the fuel injectors, coil packs, etc. Pretty much i just made sure that everything was connected and tight.

 

Check the connections to the body and engine. Where grounding looms are bolted. Usually, larger gauge black wires. They are around the engine compartment, including one behind the cylinder head.

 

Are they easily accessible from the top? Im also guessing the service manual would have the exact locations of these grounding points...I hate everything electrical, so I try to stay away from things like that, but I will have to check to rule that out.

 

Check all over. Top and bottom. Look for pinched or damaged wires, between connections, too. DVM may help you with grounding contact points. DVM mode = DC resistance --- one lead on the grounding point and one on the battery negative terminal (-). Should have near zero resistance. Shake the ground wire to see if you have a bad contact.


I know electrical problems are a pain. Good luck!

 

My biggest fear is the possibility of the AEM ECU going bad....that would be worst case scenario. But i will trace every single point on the wiring harness, and see if there any problem with the wiring.

 

You have two bundles of grounds on either side of the back of the radiator and you have two grounds from engine to chasis on the drivers side which are visible from above, then you have the main ground wire from the back of the head to the firewall. Additionally the negative battery cable and inside on the drivers side kick panel next to the ecu you have a bundle of grounds as well. Good luck!

 

Ok, so grounds look good. I checked the ones on each side (the inner part of the fender), the one in the back of the head is tight, the one in between the brake booster and the ABS module is also tight. All the grounds behind the driver kick panel are also good.