Infiniti Repair Questions? Ask a Mechanic for Answers ASAP
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You said you replaced the throttle chamber?
Do you have access to a scanner?
You had a consult 2 hooked up to try to do the relearn?
Do you have a consult?
have a scanner
ok, did you get the throttle chamber from the dealer, or your local parts store?
yes the dealer hooked up a consult 2 got the idle down but it won't stick
oem throttle body
Ok, you got it from the dealer,.. correct?
There is a few things that can keep the idle relearn to take.
First thing I would check is the air and fuel mixture readings.
Other wise know on a Nissan .. Called Alfa..
Or long Term Fuel Trim
I would like to see what those readings are. If out of spec, it will never learn
what should they be?
Depending on how your scanner reads them;
Around 100% if it can read Alfa,
0 if it's long term fuel trim
Give or take 5 or 5 %
ok what would be next?
Start the car, and monitor these readings
make sure the car is fully warmed up. What is the car idling at?
gotta run outside ...1000
ok.. Yeah check those readings. Also make sure you have the AC off, and head lights
ok give me 10 mins be right back
ok it's at 9.4
Your running lean. That is to high and will never learn.
It would need to be between 5 and -5 for it to learn properly
ok so what do I need to do?
First you need to determine if you have a air leak.
Unplug the MAF sensor, and start the car and let it idle.
See if the mixture readings drop to -25
I've checked don't hear any
If you have no air leaks, then you may have a bad MAF sensor causing the mixture to be off.
I would try some MAF sensor cleaner on the MAF first to see if that will bring the readings down.
should I do this with the p0507 code or clear it and do the pedal dance to get the idle down
already tried to clean the MAF
You can just start it. It will cause MAF sensor codes and Intake Air temp sensor codes, but by unplugging the MAF and looking at the readings will verify the MAF sensor is not metering air properly
ok gonna run out and unplug the MAF
If unplugged and the mixture readings drop to -24
-25, that means you have no air leaks
if it only drops to -15
then you have a air leak
-25 is the default reading
am I still looking at the LT fuel trim or MAF reading?
long term fuel trim
ok with MAF disconnected it reads 0.0 idle went up to 1500 then started to stumble
ok, it won't do it properly cause there is no relearn
Well I would get a can of MAF sensor cleaner and give the MAF a cleaning, then let dry, and reinstall.
did that a few days ago
Then clear the self learn, and double check the timing adjustments and make sure it's Zero.
clear self learn?
Then make sure your power steering switch or vent control valve are both off, and try to to perform the idle relearn, if you can get the mixture with in spec
Yeah, when you do a idle relearn you need to clear the self learn
I'm confused ...how do I clear the self learn?
The cars have adaptive learning that learns on how you drive. You need to clear them in order to perform the idle relearn properly.
I don't know on your scanner.
oh clear the code
I know on the Consult 2 it's in work support with the Idle Relearn.
or clear the ecu
You need to clear the code also
But there is a setting to clear the self learn also
I don't have a consult 2 but I can do the pedal dance to clear the self learn
Do you have all the manual steps to perform a manual idle relearn?
been doing the dance for 2 weeks
ok u said to check the timing adjustments...how is that done?
That is also done with the Consult
If the timing is not at 0, it will also never learn
That is all done under work support
I can only tell you what I know with the equipment I use. I don't know what scanner you have and really have not worked with many other scanners other than the Nissan Consult 1, 2, 3 and Plus
ok so lets say the timing is not at 0....does that mean I am stuck with this high idle?
I'm using the actron CP9580
I don't know that scanner and it's functions.
No, you just need to have the dealer set the timing to zero for you
where is this power steering switch or vent switch?
The power steering switch is on the high pressure steering hose, and the vent control valve is in the back of the car connected to the evap canister which is on the drivers rear.
are we talking about the same timing that can be advanced a few degrees for performance?
yeah, that one
make sure it's at zero
There is also idle adjustments also
that should be at 0 also
if I remember correctly my timing was advanced when I had the ecu flashed
That could do it!!!
That needs to be turned back to Zero, then it should take the idle relearn
Also make sure your idle adjustments are at 0 as well.
yeah but this was done over 5 years ago
Ecm flashing effects both those settings
If it was done 5 years ago, it has never been changed, so it's most likely still adjusted to what ever it was set to
ok before I take it to the dealer is it possible the MAF is bad and not throwing a code because when I disconnected it I saw the slip light came on the same way it did when this problem 1st started
No, I would bet if you had the Ecm flashed, and the timing was advanced, that most likely is your whole problem
I would have the timing and idle set to zero, then clear self learn, and have the idle relearn done again.
The timing is normally not checked unless the dealer is told the timing has been tampered with as far as advancing it.
damn so that means I will loose all my power gains with the flashed ecu?????
Well once you have the relearn done
Just have them put the timing back to where they found it, along with the idle adjustments
Not a big deal
Wheww u scared me for a min their Jay...ok guess I just gotta bit the bullet and go to the steeler ship oopss I mean dealer ship...thanks for you help!
You got it. As soon as you mentioned the Ecm flash, that makes all the sense in the world to me.
and have dealt with it many times, on 350z's and G's
It's one of those things that when I can't get the relearn to take, I check those readings normally.
or when another one of the guys in the shop can't get a relearn to take, I am normally called over and I check those and find that they have been tampered with.
tampered? I prefer modified lol
So I am sure just adjusting them to Zero, performing the idle relearn and setting them back will be all that is needed to be done.
When you work at the dealer, it's called tampered...hehe
so I just tell them to set the timing back to 0 ...do idle relearn...set it back to where it was...u don't happen to be in NJ do u? Wouldn't mine bringing it to your shop
I am in NJ
Where are you located?
is where I work
Hmm where is that 17?
Feel free to make the appointment, and request me, and I will take care of it for you.
so just request Jay or is that your moon lighting screen name
Just request Jay.
That is my name
I use to work at Lynnes.
ok you guys work on Saturday?
I am actually working this saturday
wow small world
glad u told me because I really didn't want to take it to Fette in Clifton
If your going to make the appointment for saturday, try to make it later like around 1pm or something
Yea, I hear ya
Ok Jay I gotta work this Sat but I am going to call and hope I can get next Sat
Just let me know, If I need to come down and take care of this for you, I will
I am not working next saturday. But I live close so I can run down and take care of it for you.
Just let me know what time you have your appointment
u got a number I can text u or call u
Personal contact is against our terms and services. But I am simply telling you were you can have your problem corrected.
Ok I'm gonna call tomorrow and set the apt for next sat...don't know how I will get the time to you
Just reply back to this question tomorrow and let me know.
You got it.
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