Hey guys :

I own a 96 Explorer (4.0 L OHV V6). My question being .... how would you know if your throttle stop screw is stopping the throttle in the right position? ....Any info in regards to checking /adjusting it would be appreciated.

Thanks

 

Any change to this screw will also change the throttle position sensor setting. I've been told by Ford techs to leave it alone......

Maybe someone with first-hand experience will chime in........

 

I have also heard the same.

 

Hey guys ..

thanks for replying to this... I guess my question wasn't so clear .... u see, I suspect my throttle stop screw is not adjusted right & would like to know as to how I could check this to see if its in the right position or may need to be adjusted. I suspect that my brother might have fooled around with it. Of course when I asked him he said no. Go figure.

your help is appreciated.

96 Explorer (4.0LV6 OHV)

 

If you aren't getting any "Throttle Position Sensor (TPS) out of range" errors then it is fine. All it does is change the resting position of your TPS at idle. Your TPS is basically a variable resistor that changes with throttle input. If you adust your throttle plate screw you'll either increase or decrease the resistance of your TPS. If you increase the resistance too much, then at Wide Open Throttle (WOT) your TPS may max out at 100% before your throttle actuall does. If you decrease the resistance too much your resistance at idle might drop to 0%. For example with my throttle plate screw set correctly, my TPS reads 18% at idle and 92% at full throttle. These percentages also corelate to an actual voltage across my TPS but I can't remember the exact voltage right off hand. If you adjust your screw, your engine will idle high or low temporarily until your PCM corrects it back to the proper RPM. If your engine idles properly and you have full throttle then I wouldn't be concerned about it. If you still are concerned there are several ways that you can verify that it is within range. One is by measuring the resistance of your TPS at idle and full throttle. Adjust the screw until your resistances fall within acceptable limits. Another is by using an OBD-II scanner and monitoring the minimum and maximum readins of your TPS. Adjust the screw until you fall into range. I'm not sure what the proper ranges are for your engine though.

 

Reberhardt, will adjusting that screw change the "initial start fast idle"? My idle jumps to 1800 rpm on a cold start, then settles down to a normal range. I would like to set the fast idle a little less than that......

 

Thanks reberhardt

 

Oh reberhardt, any ideas what those resistance values might be?

If not, not a problem, I'll find out... If you do ... it would be a great help.

Thanks.

 

No, my referrence manual only list the voltage which is just as easy to get. Unfortunately, I don't know which two pins you have to read across to measure the voltage (I just use my scanner). The range for my '97 is 0.53V-1.27V for KOEO and Hot Idle, 1V-1.4V at 30 MPH and 1.2V-1.7V at 50 MPH. My scanner reads in percent of throttle and DCV. If yours isn't a '97 it may be slightly different. My KOEO readings are 0.93V at idle and 4.55V at WOT.

 

Thanks reberhardt