Need some suggestions!!

[Mtnbker3531]

Ok so my car has had some issues over the past week. At first I thought it was a fueling issue so I went down that path. I got to a point with troubleshooting where I realized this was a little beyond my means.

Mainly what triggered that decision was some of the DTCs I was able to pull from the car.

Loss of communication with the Ignition Control Module, Loss of Communication with the Instrument Cluster and Random Misfires.

From the little bit of research I did I felt like this needed some CAN troubleshooting. So far the dealer has found the PCM out of date and the plugs I installed are for the Gen 1.

I have a 13 Speed3 only mods are a Corksport Stage 2 intake and a cat back. This is the first time in my life I'm paying for an auto repair and the labor rates and hours allocated to things is shocking to me.

My question to everyone is who in the Chicagoland area is a fairly priced and trusted mechanic? I looked in the regional forums and there is a simair post but it went nowhere and is years old.

 

[Easter Bunny]

Look at the clamps on your intake and inspect the ECU jar was anywhere the clamps could have contacted the wires.

Disconnect the battery and then disconnect and reconnect the ECU harness plugs making sure that they are seated fully.

 

[L337TurboZ]

Module communication issues are pretty easy to solve. It usually comes down to three things

A bad wire or wire connection (I.E. loose connector, high resistance caused by terminal fretting/corrosion)

An aftermarket device bringing down the communication network. Usually happens to single wire communication networks (low speed) and not high speed (2 wire) networks.

A bad module shorted internally.

I handle issues like this a couple of ways. First what modules can I talk to or see on the network (which ones report trouble codes, which arent showing up) then I check fuses for the modules not communicating make sure they are good. Next check for power, ground, and communication voltages at the module in question. Check wire resistance between the module not communicating and the module asking for communication that is working. Make sure the wire isnt shorted to voltage or to ground.

If there is power, ground, communication voltages at the module in question and the wires test good it probably is a bad module. If using a test light to check for power and ground make sure it is high impedance (high resistance) because you can see 12 volts but not carry enough amperage to actually turn the module on.

As stated before check your ECU connections. Make sure there isnt corrosion from the battery or bad pins. Make sure nothing rubbed a harness and damaged a wire. Let us know what you find.