I picked my car up today from getting retuned and a smaller pulley (3.875" comptech making 9.2 lbs of boost at 9000rpms) and about 5 miles after i get on the way home my ecm light turns on at the same time my speedo goes to "0". I restart the car and nothing is different. i assume its just a tripped ground but i went into the rats nest and looked around finding all clean and solid connections. the steering feels heavier and rougher (i feel the road and tires with my hands alot more if that makes sense) any ideas welcomed.
CHRIS.

 

Check your yellow box wiring splices.

 

can this change the steering feel as well?

 

Yes. The Yellow box splices into the VSS signal wire, which is used to determine steerring assist for the Electric power steering, AKA EPS, which is the light you have on, not ECM.

 

check for any leaks in the EPS system.

 

It's electric, there is nothing to leak out.

 

yea thats why im confused about to why it feels different at a stop because wouldnt it already be at zero with the speedo?

 

With some EPS codes stored and signals missing the EPS controller shuts down all power steering functions.

 

why dont you take it to the dealer..they can figure it out

 

I cant go to the dealer kuz im out of warranty due to years (still at 33k miles) and the problem is from the yellow box, i got the speedo to work today, the off switch had been flipped on, but the eps is still on, i went through all the wiring and it all looks clean. i will get back in the footwell tonite and see if i can fix it.
CHRIS.