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M35 Still Stalling - Not Idling Properly

pixel8r

By pixel8r,
in Four Door Family & Wagoneers

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pixel8r
pixel8r

Hi, My M35 has been having idle problems for about the last 3-4 months. I've narrowed it down to a fairly specific case - and I can verify this almost every time now. It generally idles at 500rpm -

pixel8r
pixel8r

I think I found the problem. Here's some pics of the Throttle Body: Front Back You can see even on the Front side the ring of black thats built up. On the Back its quite evident there is a LO

pixel8r
pixel8r

Here's all of the diagnostic procedures I'm aware of for the ECU (there's more for the A/T too) - its all in the V35/G35 manual which I'm sure you have a copy of - its available on the net otherwise i

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andy65b Veteran

andy65b

Posted
Posted
better still, bring it over to my place if you REALLY need to get away, ill give you a hand if you like

will you be around saturday arvo?

If so, I may take you up on that offer.

Bis-e Bee Mentor

Bis-e Bee

Posted
Posted
will you be around saturday arvo?

If so, I may take you up on that offer.

Just watch him around your car with tools!!!

You may well be on your home and discover your sway bars and various other pieces are missing!

Bis-e Bee Mentor

Bis-e Bee

Posted
Posted (edited)
I was thinking that but I thought I would cut him some slack. LOL

That was nice of you!

Jet's dump pipe arrived, woo hoo!

Edited by Bis-e Bee
pixel8r Mentor

pixel8r

Posted
  • Author
Posted
Glad to hear that you problem is now sorted.

My car was doing similar things. The only mistake I did was had 2 things done at once. TB cleaned and TPS reset. I don't know which solved the problem but my car idles a bit fast at around 775 - 825.

I wish I could get it down. I might do the TB clean this weekend if I get a chance.

The inlaws are visiting over the weekend this sounds like a great reason to be working on the car. LOL

Yeah I actually cleaned the AFM as well - but i've done that on its own before and it never fixed the problem - however it probably helped in its own way.

My car does now idle at 650 on the dot when its warm, but when cold its slightly higher - around 800-900rpm. When I turn the car on when its cold, it initially revs at 1500rpm now before settling down to around 800rpm. Weird. I thought the idle air learning would fix that but it seems not.

Not sure if its a problem - like I said it drops to 800rpm quickly and then as it warms up that drops further to 650. After that its all fine, car is driving like new!! Yes I'm excited - this problem has been annoying me since I got the car.

Jetwreck Grand Master

Jetwreck

Posted
Posted
Yeah I actually cleaned the AFM as well - but i've done that on its own before and it never fixed the problem - however it probably helped in its own way.

My car does now idle at 650 on the dot when its warm, but when cold its slightly higher - around 800-900rpm. When I turn the car on when its cold, it initially revs at 1500rpm now before settling down to around 800rpm. Weird. I thought the idle air learning would fix that but it seems not.

Not sure if its a problem - like I said it drops to 800rpm quickly and then as it warms up that drops further to 650. After that its all fine, car is driving like new!! Yes I'm excited - this problem has been annoying me since I got the car.

yeh mine does this as well....and that's with new plugs and the TB cleaned...sounds normal.

zei20l Grand Master

zei20l

Posted
Posted

i should confirm that mine idles high on a cold start, and then around 600-800 on warm idle. the longer i sit at idle, the lower the RPM goes. mines been as low as 500 (from the tacho) but who knows what it really might be :D

andy65b Veteran

andy65b

Posted
Posted

I have been thought this whole process and each time I have successful reset each of the the 3 options and I manage to get the car to idle at 750rpm. A little higher than i would like but not too bad.

The problem I have is that each time I turn the car off the idle learning seems to get lost and the car goes back to idling at 900rpm. It is like the computer is losing power and resetting without the memory of what I just set.

I am aware that my ignition barrel seems to have a bit of dodgy connection as if I bump the key back a little all the accessories turn off. this is easily fixed with a wiggle of the key.

Is it possible that this connection is causing this problem or does anyone have any other suggestions?

Cheers

Andy

oz_panda Contributor

oz_panda

Posted
Posted

Hi Andy,

Im having the same problems too.... not sure if we should call it a problem,

after aI have put new plugs and cleaned the TB, my idle has been raised to 900-1000rpm no matter how many times i reset the 3 options,

it only idle at 650 spot on when Im in D with the brakes on ( waiting at the nights )

I think maybe we should have a small meetup so we can see the others or try to do everything again together!

as I always belive more people have more brain and more idea...

David

zei20l Grand Master

zei20l

Posted
Posted

mine idles fine

andy could be onto something, it might override the idle setting till you swich off the ignition. its possible its never 'written' to the ECU. it may only be possible via the consult..........

andy65b Veteran

andy65b

Posted
Posted
Hi Andy,

Im having the same problems too.... not sure if we should call it a problem,

after aI have put new plugs and cleaned the TB, my idle has been raised to 900-1000rpm no matter how many times i reset the 3 options,

it only idle at 650 spot on when Im in D with the brakes on ( waiting at the nights )

I think maybe we should have a small meetup so we can see the others or try to do everything again together!

as I always belive more people have more brain and more idea...

David

I am going to test a ODB2 cable tonight to see if I can read the computer, maybe this will give me some clues.

I will also see the Auto Electrician to see if he can fix the error in the key barrel. See if this helps.

Bis-e Bee Mentor

Bis-e Bee

Posted
Posted
So are we having a mini meet at "F&cuk for Parts" guy this weekend? :D
rofl, its already done mate. you missed out! haha

lol, i take it someone is frustrated??

not u iain, we all already know about you and your frustrations :)

pixel8r Mentor

pixel8r

Posted
  • Author
Posted
Hi Andy,

Im having the same problems too.... not sure if we should call it a problem,

after aI have put new plugs and cleaned the TB, my idle has been raised to 900-1000rpm no matter how many times i reset the 3 options,

it only idle at 650 spot on when Im in D with the brakes on ( waiting at the nights )

I think maybe we should have a small meetup so we can see the others or try to do everything again together!

as I always belive more people have more brain and more idea...

David

This sounds normal to me. It will always idle high when cold etc. The important thing is that you do the idle air learning when the car is fully warmed up - so go for at least a 10 minute drive and then do the idle air learning straight after that.

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