Fuel tank temperature sensor? Rich idle, stalling.

[casman86]

I have a '96 S14 JWT ecu in a '95 S14 and I'm getting code 42 (0402) which is fuel tank temperature sensor. I looked through the FSMs for both years and apparently this is something they added in '96, my '95 doesn't have it.

My question is if this affects fuel and timing? I'm having issues with stalling and really rich idle (10-11:1afr). I have all emissions removed, knock sensor bypassed. I've tested basically everything at this point. If the fuel tank temp sensor absence might be doing this I'll wire one up, but don't want to waste time if it's a useless sensor that doesn't change any ecu parameters.