blakern

iTrader: (9)

Took my car to the track yesterday and only got two runs in because of rain. First run the nitrous only sprayed in 3rd gear? Second run it didnt spray at all.
I have a dynotune window switch and ive got the TPS tapped into right @ the sensor. The window switch is only reading 4.4 volts @ 100% throttle. Could this be why its not activating? Should I just wire in a WOT switch instead of going off of the TPS?

porksoda

iTrader: (39)

Which window switch do you have? Link?

blakern

iTrader: (9)

http://www.dynotunenitrous.com/store...?idproduct=194

Lt1Porsche

iTrader: (6)

I noticed a possible issue when I set up my window switch. Not sure if your is the same but I am running the Dual Switch from Nitro Daves and when I was setting it up you are supposed to allow the switch the calculate WOT voltage by snapping the throttle back while running. If I performed this step from the engine bay and did it by hand my voltage read 8.5v. If I did it with the accelerator pedal from within the vehicle the tps would only reach 8.44v. So if I did not check it before I tried to run it the switch would of never read WOT. Just a thought.

blakern

iTrader: (9)

Interesting. My owners manual says to do it with the engine off unless you have Drive By Wire.
I set my TPS volts to 4.1 on the window switch, it seems to be activating like it should now.
Just wondering if 4.4 volts WOT is normal?

Lt1Porsche

iTrader: (6)

Like I said I am using a different WS. Im tapped straight into the TPS. No drive by wire here.

miller456

iTrader: (36)

with the car running or just the key turned fwd mine read the same voltage. I think mine read 4.45 or somewhere around there. Are you using the gear lockout feature? If so probably a stupid question but are you making sure the car see's redline before hitting 2nd? Theres a few reasons it wouldnt spray and kinda hard to pin point from the info so far, but it sounds like you got it working again anyway

blakern

iTrader: (9)

Na im not using the gear lock out. So I guess 4.4 volts isnt a problem. I just thought I read somewhere on here that your suspose to have exactly 5 volts.

waterbug1999

iTrader: (3)

Check your throttle cable.... Between the cuise/traction control box (I think thats what it is) and the throttle body you have the clip looking thing.. Sometimes that pops off and your not at 100% WOT as its lettign your cable slide.. It has happened to me a few times, I recently did it and put a zip tie on it to keep it from popping it off.

If you pop the clip off youll see what I am talking about.

But, I am not sure if 98's have it.

waterbug1999

iTrader: (3)

after re-reading it sounds like something else...

If you are not using both stages, have teh 2nd one match the 1st one.

blakern

iTrader: (9)

Yeah I dont have traction control. But i'll try that second stage thing you mentioned. I know my second stage is set to something else, I dont use it so I just left it alone.

waterbug1999

iTrader: (3)

The peeps at Nitro Daves told me that... ALso make sure you have a good ground as well.

Grant@NitroDaves

I believe whatever voltage you give it when setting the WOT is what its gonna think WOT is.
So technically when it asks you to go wide open for a second so the window switch will know what voltage to look for to activate, you could go only half or 3/4 throttle and it will save that voltage reading. So when it sees that voltage(3/4 throttle) again it should activate.

blakern

iTrader: (9)

Yeah thats what i think the problem was. Ever sence i set it @ 4.1 volts, which is prob about 7/8s of full throttle, it seems to activate just fine.

Grant@NitroDaves

glad you got it all squared away.

waterbug1999

iTrader: (3)

4.1 volt? Normally should be 4.5 - 4.6 volts, you could be leaving some on the table.

Is your TB cable tight? Feel the slack around the end where it attaches on the blade.

Lt1Porsche

iTrader: (6)

I think your tapped into the wrong wire. One wire is ground. Other is 5v power wire or close to 5v. And the middle wire (I believe) is the voltage reference wire. My TPS reads over 8v at WOT. I dont think your on the correct wire. Double check.

blakern

iTrader: (9)

8volts???? Anyone else read 8 volts????

waterbug1999

iTrader: (3)

I think its suppose to throw a code if you go over a 4.6V... I remember in the "free mods" when the stock TB would open up to ~4.4 volts and you grind the bump stop to get it to 4.6v (WOT).

Maybe search "bump stop mod" to make sure...

blakern

iTrader: (9)

Yeah thats exactly what I was thinking. 8.sumthing volts is messed up?