Hello and thank you for using JustAnswer.com
Did you pull the coil pack to see if there was oil in the spark plug galleys?
No but I have been playing with it and the symptoms have changed.. All white smoke is gone, still no codes or check engine light and runs great down the road. foot on brake in park and its wanting to hold at about 800 rpm but once in nuetral (park jams, old problem) the idle surges frommmm(NNN) NNN-NNNNRP and sometimes stalls
synptoms changed just from sitting a couple of days then putting a few miles on it. Maybe computer is drying out? the clicking is in the fast idle valve (parts house calls it)
I will go do that if you want
Do you find you have to keep your foot on the gas to keep it running at idle?
someties it drops so low that I either have to tap the pedal or release the brake and let it lunge forward a little
but again : it seems to be changing. my last trip it did not stall at all until I went back into neutral
Try this and see if it helps. Get a can of carb cleaner and a old tooth brush and clean the throttle chamber.
Scrub it clean and wipe down with a clean rag. It will be hard to start after you do this, but it will clear up and see if that resolves your problem.
I know where the throttle body is but are you talking about the entire 4" diameter aluminum piece from the intake to the plastic breather assmbly?
No, not the whole thing. Just the throttle chamber. Pull the throttle cables to open the butterfly up and clean the area of the throttle chamber on the bottom and top of where that butterfly seats.
or are you saying to pull the fast idle valve and clean behind there?
No, just remove the intake boot, and clean the throttle chamber. Do you need a image of it?
I just moved the operation to my driveway and started to pull everything apart as you instructed and when I pulled the big hose that goes to the neck of the fast idle valve I noticed oil all on the inside of it so I figured I would stop there and let you know. All the way home (8 miles) the problem only occured in neutral.
I'm going back out to clean it but I also dumped some Sea Foam in the tank
Dude this think is VERY NASTY!!! Do you think I should pull the F/I sensor and clean behind it too?
You must have a lot of miles on this car. Just clean the throttle chamber to start and see what happens.
200+ but im not sure how good I'm getting behind the butterfly cuz the toothbrush aint no Reach
I'm not making this up: the air filter had about 25oz of solid black sand in it so I'm goint to get one as soon as I get it back together. Judging by that, I'm wondering how much good I'm doing just getting past the butterfly
FixUrInfiniti may have called it. I'm going to test drive around the corner to get breather filter but I'm noticing a top-end tap that was not there.
How could this be related?
Nope- still surging. The problem is constantly changing (mostly for the better)but still there. Now when I pull the pigtail to that same coil pack it makes a difference but then again I guess I'm wasting my time trying to second guess a computer that switches many time a second.
Oh- keep in mind that it did idle real nice for about 15 min. straight right after I put her back together so you must be close
Make sure the throttle cables are not to tight. What does it idle like after the 15 mins
I will let her run for 15 mins now. but is there anything you want me to chek while shes cold? I will wait for a few for your reply before I do.
BTW, I'm going to accept your answer either way and I only have a copule hours before I go to church but I would like to try everything or at least pinpoint the problem. I just realized you helped me with this car several months ago when my ignition ciruit took a crap.
I will but I want to run something by you first:
I'm pulling the coil pack/plug to the cyl that I had no change on before.
Remember my oil leak? I probably have no idea what I'm talking about here but my oil seems thin and over full (cold) despite the leak and seems to have a faint smell of fuel.
Could I have had a ring washout or whatever you gurus call it? If so, could it have corrected?
Its hard to see but the end is kinda carboned. A little fuel/oil but nothing that seems unusual. I caleaned and replaced. The oil is full to the hum on the dipstick on both sides.
I'm not sure if it matters but the car is slightly leanin to the dip stick side in my front yard. If it is overfull the gusher leak should take care of that, right? I added a quart of this two-part Bars engine treatment to it yesterday.
Starting now and will report back.
Okay jay at 2 min it surged for about 20 sec. and went away. now it has been 15 and its idleing steady at 1 grand.
I have to confess: as an electrical contractor I know better than to change shit in the middle of troubleshooting but I couldnt resist playing with the black, plastic screw. I didn't turn it far though. What should my warm idle be? Is it fixed or do I need to test drive or restart?
Okay now it idles real nice but as soon as it goes in gear the surging starts
Will do but dude I'm sorry- I had left a small vacuum line off last night that I just spotted. I replaced it back to the breather assy. and the surging returned in idle.
There is other line off near front end that has an angle down towards the ground but appears to go nowhere and when I place propane bottle to it the engine does not rev so I have to assume its not a factor.
TPS is pulled and no surge. Here is the line I found (besides the one I replaced to the metal nipple on the plastic breater):
yes it stopped but (idle/ not tried in gear) still no check engine light and I'm sure it works.becuase it works with key on and was on steady before breakdown.
BTW, oil leak just cam back in a major way.
I swear I hear air leak when I'm standing away from car on passenger side
The friend of a friend mechanic said the only thing he saw was that the TPS was giving no codes. He adjusted the TPS on its sliders a little and played with the black plastic screw to no avail. I noticed that when he had the screw turned in too far that clicking increased on the high idle valve.
Does this tell you anything? Otherwise I have an apointment at the Nissan dealership in the morning and theyn want $100 to put it on their scanner.