rc_cola_j Posted January 17, 2016 Share Posted January 17, 2016 Sooo, I had a friend of mine offered to give me a tune-up and a glance over before going on a long road trip in exchange for venison. I took him up on it. Well, you know that little stop screw on the throttle body that the service manuals say to NEVER TOUCH.....he touched it. Long story short.......vehicle is running and idling properly for now.....in fact my EGR issue disappeared....., but I'm wanting to make sure it is set properly. What is the proper procedure??? I have come across two different methods in my googling.... #1 unplug TPS, bring idle up to 600-650rpm with the stop screw. Then bring base idle up to 700 +/- 50 rpm with IAC adjustment. #2 unplug TPS. Adjust stop screw until it 'just kisses' the throttle......adjust base idle up to 700 +- 50rpm it's IAC adjustment. Which (if any) is right? I have a week to figure this out. I really appreciate you all helping me out. I have learned a lot since buying my pathfinder and joining this forum. Thanks! Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Precise1 Posted January 17, 2016 Share Posted January 17, 2016 Well, if you displayed what year/model you had, that would help us answer the question... (hint, fill out your profile/description info) B 1 Link to comment Share on other sites More sharing options...
rc_cola_j Posted January 17, 2016 Author Share Posted January 17, 2016 Sorry, I'm using Tapatalk.....I thought all that was enetered.. 2000 Pathfinder SE. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Precise1 Posted January 17, 2016 Share Posted January 17, 2016 OK. Not sure what Crapatalk has to do with it, but whatever. So, page EC-34 has an adjustment procedure for the FIC (Fast Idle Cam) in the 1998 FSM. I'd download the 2000 FSM from the pinned thread in the Garage section, look that up, and follow it. Seems pretty straight forward... B Link to comment Share on other sites More sharing options...
rc_cola_j Posted January 17, 2016 Author Share Posted January 17, 2016 It's not the fast idle cam. It's the throttle stop screw.....the manuals say nothing more about this screw than "Do Not Adjust" And yes.....the method for setting the idle speed is very straight forward. My question was how to adjust the throttle stop screw back to where it should be so that I can continue on and set the idle properly afterwards Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Precise1 Posted January 20, 2016 Share Posted January 20, 2016 OK, I got a chance to go out and look, and I get it now, sorry for the previous confusion. 3 different adjustment screws... Anyway, it is the one on the top left of that whole system, and mine is secured with a lock nut and painted red. First, how much did he turn it? Is it possible to just try to get the paint to line up again and determining the depth of the screw by and residual paint/no paint on the root of the threads? Second, I've checked nine on a 1999.0 off and running, even operating the throttle, and the screw isn't even in contact with the stop by about .7-.8mm. I will double check this at hot off and running conditions tomorrow when I drive it. I can get accurate measurements for the gap rather than a guesstimate and for a lack of anything else, you just set yours there and see... Just let me know... B Link to comment Share on other sites More sharing options...
Precise1 Posted January 22, 2016 Share Posted January 22, 2016 Well, the throttle stop most definitely contacts while hot, running or not so I measured the distance that the screw protrudes. .100" or 2.5mm or just on the minum side of that; I had to eyeball it with a machinist's rule since I couldn't get caliper jaws in there. The last bit of info, mostly for reference is the gap when cold, I'll try to get that today. I'm wondering if getting voltage readings from the TSP hot and cold would tell anything, or even vacuum, but then there are so many things that go on with vacuum when cold, it might be meaningless even if there is a difference... B Link to comment Share on other sites More sharing options...
rc_cola_j Posted January 23, 2016 Author Share Posted January 23, 2016 Thanks Precise1. I'm going to try each approach and see how it drives and runs. Have completed option 1 this morning she seems to be running well. I'm taking all of my tools with me so I can readjust to option 2 after a couple hundred km Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
rc_cola_j Posted January 23, 2016 Author Share Posted January 23, 2016 If neither work, I'll go to a dealership Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Precise1 Posted January 24, 2016 Share Posted January 24, 2016 You are welcome, sorry for the initial confusion. I'll get the last bit of data, the cold gap from stop to end of screw tomorrow morning when I have light and it isn't raining... B Link to comment Share on other sites More sharing options...
rc_cola_j Posted January 24, 2016 Author Share Posted January 24, 2016 Do you have a throttle opener on yours? Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Precise1 Posted January 24, 2016 Share Posted January 24, 2016 Throttle opener? I'll take a picture or two at the same time to post my configuration. B Link to comment Share on other sites More sharing options...
Precise1 Posted January 28, 2016 Share Posted January 28, 2016 Ok, time to wrap this up (I finally remembered when it wasn't raining). The gap on the throttle stop (when cold) was somewhere between .044-.048" (1.1-1.2mm). It was a little hard to tell exactly, because I had to double up feeler gauges and there isn't much room to work. I don't know what you mean by throttle opener, but this is what my set up looks like. I can take any other pictures or measurements that you might need, but I think this should put you in the right proximity... B Link to comment Share on other sites More sharing options...
rc_cola_j Posted January 30, 2016 Author Share Posted January 30, 2016 Yup, that plunger on the right is your throttle opener, it holds the throttle slightly open at startup......it's another one of those things the repair manual says not to adjust. I did notice that my throttle is sticking shut now. Will tweak it a bit and see what happens Thanks for helping. I'm going to fiddle with it some more Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Precise1 Posted February 18, 2016 Share Posted February 18, 2016 You are welcome. Our throttle used to be sticky shut, usually cold weather, and once I cleaned the throttle plate it basically went away. Something to consider... B Link to comment Share on other sites More sharing options...
rc_cola_j Posted February 18, 2016 Author Share Posted February 18, 2016 That's actually quite helpful. It tells me it should really just "kiss" it open Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
rc_cola_j Posted February 19, 2016 Author Share Posted February 19, 2016 Thanks Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Precise1 Posted February 22, 2016 Share Posted February 22, 2016 Again, you are welcome. Everything still working good? B Link to comment Share on other sites More sharing options...
rc_cola_j Posted February 22, 2016 Author Share Posted February 22, 2016 Seems to be really good. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
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