Help

Ok so I installed a n2mb wotbox and after the install car ran terrible. Felt like was running on 3 cylinders. i went through every troubleshoot through n2mb and nothing fixed it. I finally got to the point and pulled it off the car. Now the car seems to be running the same way. Could the wotbox have messed up my tune? Car idles funny and when I give it gas from an idle it hesitates almost as if leak on turbo side or throttle body issue. I hooked up snapon computer and shows no faults or misfires. Only code I get right now is p0463 which I never had before. I did pull fuel pump to make sure both pumps were working.

Just quick rundown of my setup is fully forged motor, stage 3 livernois cams, gt500 fuel system with twin aem 50-1200 pumps with a 78mm turbonetics turbo. I have not had any issues until wotbox got installed. I am at a loss now and not sure what to trouble shoot next. I pulled the maf and cleaned it. According to the snapon computer it is functioning fine.

The code you mention has to do with the fuel gauge sending unit. So not to sound like a smart-butt, are you SURE there is plenty of fuel in the tank?

Verify the ground point (assuming you used a common ground point and didn't create a new one) you ties N2MB ground to. Make sure all wires that may have been at the ground point are connected and nothing that could insulate the lugs from chassis metal is caught between that could compromise solid connection.

Next recheck the connection on the wire you spliced that tied the ignition coil power into the N2MB box. That fuse feeds bank one and two according to the prints. You would have tied into one side or the other. This would make the car dead on either one bank or the other if the connection was not properly remade. When the PCM relay engages at key on you should have 13.8 or so out both of those wires. That provides voltage to each bank. The PCM then through the firing order strategy determines which COP will be fired accordingly by providing completed path to logic low via internal switching transistor or FET device. If the connection there has been compromised you could have one back completely dead and the car only running on 4 cylinders.

If that checks fine then the nest place would be where you tied the box into the TPS sensor. Revisit that connection. Then datalog key/on engine off the throttle commanded vice Throttle actual position. THere are other signals you can also monitor to see that the feedback on the TPS is clean and smooth throughout the idle to full throttle (82-85%) open position.

Crank sensor connection should also be checked. But it is likely that this would throw a CEL right away.

Inspect and reinspect all wiring in and around the area you were adding the upgrade. Non related wiring could have been compromised so close attention to detail is essential. Use a bright light and magnifying glass if need be to insure there is nothing messed up. I have had a single strand of wire on a terminal block find its way onto the terminal next to it and cause faults in equipment I have worked on because of sloppy splicing practices by others in a hurry.

Best of luck.

tunes are not changed by mechanical changes, in general tunes don't change.

IIRC, adding the WOT box requires taping into a bunch of wiring and soldering, if all was ok before the install, best bet is with some of that wiring gone awry

Yes there is fuel in the tank. I run e85. I even thought maybe the fuel is bad or something. I checked all the wires that I originally spliced and all the solders are good. I checked the voltage with the key forward and registers 12.4 on both wires. Checked almost all the grounds and no issues. Checked the maf and even cleaned it and still didnt fix it.