nytro idle adjustment screw

[johnelway]

i searched all around the net and the only info i found is this allen screw with the lock nut on top left of the third cylinder.
is this right?

 

[Supa Dexta]

As far as I know the computer controls the idle since its fuel injected.

 

[dubla92]

Do not adjust that screw! There is no adjustment for idle speed on the Nytro. It is computer controlled. Are you having a low idle issue? If you adjust that screw then you will never be able to get the engine to idle right after that. That screw is set at the factory on a flow bench.

 

[johnelway]

ok and any ways to setup computer?
i have power commander 5. Can i adjust it with it?

 

[gc_srt]

power commander on effects fuel not idle. FYI if you adjust your throttle cable too tight and open the throttle body slightly to increase the idle, you will throw a code

 

[loudelectronics]

You can adjust idle with a PCV. You can load the map below 3000 rpm.

If having idle problems, check your TPS and calibration. If you have a PCV and have not adjusted the TPS then you can have idle problems.

Would need to know more about your sled and what problems you are having.

 

[dubla92]

You can adjust idle with a PCV. You can load the map below 3000 rpm.

If having idle problems, check your TPS and calibration. If you have a PCV and have not adjusted the TPS then you can have idle problems.

Would need to know more about your sled and what problems you are having.

You cannot directly adjust idle speed with a PC5. You can create idle issues by not calibrating the TPS in the PC5 software prior to changing the map. These idle issues are from incorrect fuel quantities.

As stated we need to know more about your problem, like mods, kms, when does it happen, when did it start to happen etc. There are many other issues besides the PC5 that will cause idle issues.

 

[johnelway]

i have this problem since i purchased the sled.
Bone stock!

just installed the PC 5 but nothing as change.

 

[loudelectronics]

You can adjust idle with a PCV. You can load the map below 3000 rpm.

If having idle problems, check your TPS and calibration. If you have a PCV and have not adjusted the TPS then you can have idle problems.

Would need to know more about your sled and what problems you are having.

You cannot directly adjust idle speed with a PC5. You can create idle issues by not calibrating the TPS in the PC5 software prior to changing the map. These idle issues are from incorrect fuel quantities.

As stated we need to know more about your problem, like mods, kms, when does it happen, when did it start to happen etc. There are many other issues besides the PC5 that will cause idle issues.

If you calibrate the tps with the pcv and then add and subtract fuel below the 3000 rpm using O2 sensor it will affect idle.

I suspect he has a problem with his tps sensor.

 

[johnelway]

how can i check and test my tps sensor?
how to calibrate it?

 

[loudelectronics]

You can do it through the pcv or on the pod. I believe you hold down the two buttons and turn key on. Keep holding until scree reads DO I think it is. Release and hold down buttons again. You will get a value of 0-20. Press throttle wot and see where the numbers jump to. Supposed to be close to 100. At 0% throttle it should read 15-20 I believe.

Never had to adjust on a nytro. Only do it on other models. Have played around to check and in 2009 I know you could get into these settings.

 

[dubla92]

You can adjust idle with a PCV. You can load the map below 3000 rpm.

If having idle problems, check your TPS and calibration. If you have a PCV and have not adjusted the TPS then you can have idle problems.

Would need to know more about your sled and what problems you are having.

You cannot directly adjust idle speed with a PC5. You can create idle issues by not calibrating the TPS in the PC5 software prior to changing the map. These idle issues are from incorrect fuel quantities.

As stated we need to know more about your problem, like mods, kms, when does it happen, when did it start to happen etc. There are many other issues besides the PC5 that will cause idle issues.

If you calibrate the tps with the pcv and then add and subtract fuel below the 3000 rpm using O2 sensor it will affect idle.

I suspect he has a problem with his tps sensor.

I figured that is what you were thinking. That is not a good way of adjusting the idle. That is like on a carbureted sled that is idling too high you just simply apply the choke slightly to richen the air/fuel ratio to lower the idle speed. Johnelway, do not try this, you have a other issue that is causing the idle problem. I would still need a bit more info to help solve the real problem.

Loud electronics is right about calibrating the tps in the PC5. You need to calibrate the tps so that the indicated tps on the PC5 screen is 0% when no throttle is applied and almost a 100% when wot. This only calibrates the PC5, this does not calibrate the actual TPS on the engine.The PC5 see tps signal voltage not what the dash displays. So calibrating the TPS in the PC5 only lets the PC5 know what voltage is 0% and 100% so it can have its base settings.

To check the TPS on the sled perfrom the follwoing:
With the key off depress both the select and reset buttons on the dash.
While holding the buttons turn the key on and continue to hold the buttons until the dash displays "di" then relase the button and press them simutaneously and the display should read d:01. This is the tps %(% of opening) that the computer is calculating based on the signal voltage it ses back from the tps. It should read around 16 or 17 with no throttle and 95 to 100 at wot.

Adjusting the TPS requires loosening the screws holding the tps to the throttlebodies and ad rotating it to get the desired voltage with a voltmeter. They do not go out of adjustment unless you have removed it. They usually corrode and then the ecu cannot calculate the % of throttle from the voltage signal since it is incorrect. When you get into the d:01 on the dash if you can apply the throttle and have the numbers go from 16 through to 100 (or so) and get every # with no dead spots the tps is likely ok.

Again you have not provided any symptoms or your actual issue so this may not be the right direction to take. More info would be helpful.

 

[dubla92]

Also to add TPS problems, Harness issues, faulty temp sensors, exhaust donuts, will all cause idle issues.

 

[Supa Dexta]

Also old fuel this time of year after sitting all summer... Even with stabilizer can cause issues.

 

[loudelectronics]

I figured that is what you were thinking. That is not a good way of adjusting the idle. That is like on a carbureted sled that is idling too high you just simply apply the choke slightly to richen the air/fuel ratio to lower the idle speed. Johnelway, do not try this, you have a other issue that is causing the idle problem. I would still need a bit more info to help solve the real problem.

/quote]

It is a very effective way if there are modifications done. We do not know what map he is using, airbox mods, rats nest in airbox, etc? Maybe sled adding to much fuel? Not enough? Spark plugs no good? Lots needed to be known.

Lots of our builds we need to adjust idle through the map as stock icv does not work good enough. Some machines just need different afr while idling. Sometimes not an idle issue at all. Map could be to rich on deaccel causing stalling. Or to lean.

All I was eluding to is that it can be done to help. He has other issue though that would cause this that need to be diagnosed.

All good though

Cheers