i have a 97 gsr w/ skunk2 im & 98 itr ecu. the ecu is throwing a code 91, which is the fuel tank pressure sensor. gsr's dont have this sensor. my Q. is with the ecu sensing a malfunction that isnt there, would everything els functioin pronperly? ie: 2-way valve, purge control solenoid valve or anything else connected w/ the evap vacuum. just wanna make sure cause sometimes when the ecu senses one thing wrong, itll compensate by doing something else, right? my spark plugs also look like im runnin a bit lean, could this b connected?
i dont mind the pretty little amber light, as long as i know everythings workin right. TIA

 

What do you mean GSRs dont have that sensor?

All hondas past 96 should have this.
Make sure your gas cap is tight

 

Something with the usdm itr ecu's, they always do that on non-ITRs. If you want a quick fix, use the jdm itr ecu, your code will be gone. My friends car seemed to run fine with the usdm itr ecu, but he decided to switch to the j-spec one instead, code gone.

 

hmmm... the helms(96 integra) doesnt mention anything about a fuel tank pressure sensor or code 91. do u think it could b something wrong in the ecu? the previous owner of the ecu had the same problem, while runnig it in his b16. also when i plug in the gsr ecu the code doesnt come up.

 

could be due to a slight difference in the wiring harness

 

I think so too. This was the case on my friend's 96 dx and my other friend's 96 rs. Both were fixed by just using the jdm itr ecu though.

 

well yeah, because the jdm ecu doesnt look for that sensor

 

so everything else should ok, yeah? and running lean wouldnt be related to the code?

 

My car(97 civic HX) does not have a fuel pressure sensor. I have only found one ecu that I can use in my hybrid that doesn't throw a code 91. It is a 96 GSR ECU. I have used a couple others which throw a code. 98 LS, 97+? GSR.

 

so do what cars do have the FPS?