i don't think the EMS affects the gas gauge at all, but i could be wrong. best bet is to take out the fuel pump assembly and look at the lever that controls the ouput to the gas gauge.

 

I don't know if it's car specific or not with the EMS but I have quite a few friends running them in different cars and none of them have gas gauge issues...as far as temp gauges go...why not just install an aftermarket nice autometer gauge and call it a day?

I have a Halthech standalone wired in the S13 and it had the same issue with water temp so I just installed another aftermarket gauge from Defi (actually 2...one on return hose and one on feed hose so I can see the difference and know exactly when the thermostat opens...it's pretty fascinating)

 

If there is an EMS in there, it might have been boosted. maybe not.. but that ems is your culprit for the temp..

on the gas portion.. The fuel pump was probably changed maybe to a walbro.. this is common to still show like 4 bars left while the gas is going down..

even though having a higher LPH pump does nothing over the stock in terms of flow on an N/A car with the rest of the fuel being stock, the lever on the pump that tells the ecu how much fuel you have left may be catching on the filter that is replaced during installation.. it happens....sometimes it snags it.. sometimes it doesnt.. either way, just take out the pump, put in a stock filter on it which is smaller than the one on the Walbo... that should be your issue.

 

I think HMFIC has it exactly right. The car used to be supercharged, and I didn't even think about the fact that would mean the fuel pump has been changed. So there it is. I just need to either change the fuel pump filter or readjust the fuel pump, b/c I'd bet the float is getting caught up.

Thanks for the replies everyone. Reminds me of how helpful the S2000 community is. I'm glad to be back!

 

because getting the OEM gauge to work for that cheap is a much cleaner and less ghetto option

 

niiiiice

 

i've never heard of walbros giving inaccurate readings. i have a walbro as well. the gas gauge in its stock form is inaccurate enough and didn't notice any difference.

changing the fuel pump wouldn't even make a difference anyway. the pump is a plug and play device, which (i'm pretty sure) is isolated from the gauge sensor. the sensor that outputs to the gas gauge must be the culprit. it's a plastic that floats on top of the gas, attached to a lever that contacts a circuit. the circuit is contacted at a point corresponding to the height of the gas in the tank.

 

yeah I guess in an S2K i'd do it too...its way pretty to be ghetto-ified

 

Well, there is clearly some disconnect between the sensor telling me how much gas I have left and the gauge in my dash. It has no problems reading full... but it doesn't seem to read empty past 4 bars.

The problem is, it's not something I am experienced enough to just look at the fuel pump (or float) and tell if something is off. In fact, I'm not exactly sure what the stock fuel pump looks like so that I can tell if mine is aftermarket or not. The only way that I know of it tell if I'm getting a faulty reading on my dash is to let the car run all the way down to 4 bars, and then see how long it stays there. The only problem with that is I don't want to run out of gas again. I guess I could keep an emergency can in my trunk, but that's not really desirable.

I don't think anyone is suggesting the fuel pump itself is defective... the car runs great as long as there is gas in it, lol. It seems pretty obvious that the float does not "know" when I'm below 4 bars. Maybe something is getting hung up. Do you know of a way I can adjust that?

 

[QUOTE=vbb,Oct 28 2009, 10:27 AM]"Maybe something is getting hung up.