Official Engine Stalling Thread

Guest · Post by **Guest** » 28 Apr 2005, 09:54

And to close the loop:

https://www.matthewsvolvosite.com/chat/p ... php?t=3694

Guest · Post by **Guest** » 28 Apr 2005, 11:26

And another:

https://www.matthewsvolvosite.com/chat/p ... php?t=3729

Guest · Post by **Guest** » 28 Apr 2005, 12:33

Matthew,

This may warrant "Sticky" Status again.

JKBrown · Post by **JKBrown** » 28 Apr 2005, 14:27

I may as well add my "Me too...". For me, the entire dash lights up and the engine sputters and dies. I've been trying to see some pattern to this, but so far have found none.

I have a 94 850 wagon (non turbo) with just under 200k miles. This seems to happen in all weather conditions and at all temperatures. It has happened several times during a low speed right-hand turn.

It has also happened (rather alarmingly) three times on the highway. I think it was just after going into second gear; I believe I had just let off the gas.

Most of the time it happens while in traffic at low speed (under 30mph); I have always associated it with coasting after a period of acceleration, but I can't be sure that that is always the case.

This problem comes up about once every one or two weeks. It's never happened twice in the same day; the frequency doesn't seem to be increasing (this has been happening for about a year). It always starts up immediately after turning off the ignition.

Interestingly, a coworker with a 740 is an amateur radio enthusiast. He said that RF interference with the computer can precipitate the same symptoms. He had to buy RF shielding for his car. He thought that it was possible for a passing truck with a powerful enough CB to cause this, but that seems a bit far-fetched to me...

Guest · Post by **Guest** » 29 Apr 2005, 08:45

JKB,

Your described symptoms fit mine to a tee except for 2 things, which unfortunately I get to look forward to if i don't get this problem fixed before this "part" dies altogether:

1. As long as I give it gas (accelerate), it seems to be OK. In other words, it has not done it while accelerating or at normal or high speeds yet. Crosses fingers.

2. It seems to happen in my case more when the outside temparatue is 65 degees F. or more.

I read something about when cleaning the throttle body if you also clean a "buterfly valve" in it it helps since the orifice opening is set real close at the factory and this is where the actual "clog" of oil/varnish/carbon deposits is or somesuch.

See this link here for a further discussion.

https://www.matthewsvolvosite.com/chat/p ... php?t=3729
It's starting to look like the ETM is the key to all this.

Having said that, when I had this problem about 2 years ago it was different. It would just cut out under all conditions and that was solved by replacing the CAM Sensor which I did myself since it's easily accesible.

This deceleration/coming to asto things seems to be the ETM to me though.

Guest · Post by **Guest** » 29 Apr 2005, 08:54

Forgot, losing my mind, but I meant to roll this into the discussion also in previous post,

Quote:

"Interestingly, a coworker with a 740 is an amateur radio enthusiast. He said that RF interference with the computer can precipitate the same symptoms. He had to buy RF shielding for his car. He thought that it was possible for a passing truck with a powerful enough CB to cause this, but that seems a bit far-fetched to me..."

Your friend may not be so crazy afterall. When I had the CMP Cam Sensor problem, on my way home from work I could almost guarantee that the first time the engine would cut out while driving down the road at normal secondary road speed would be just after I had passed under a bridge that an AMTRAK train would cross. I'm not making this stuff up! Crazy, huh?

Electronic parts indeed. Seems possible. Wonder if the EMT is affected in the same way?

Guest · Post by **Guest** » 29 Apr 2005, 12:19

Just to get this post from another thread into this particular thread because i feel it's important:

"WhiteTurbo,

Thanks for your help. This diagram is perfect. Just for clarification, so the ETM is part of the throttle body or is it one in the same?

Will take this thing apart and clean it on Sunday if i don't rearend someone or get rearened before then. Let me think about PMing you. My paranoia just might be overcome by my cheapskatedness, however. I should probably spring for the gaskets at least. Assume I can get them anywhere? as I don't really like going to the dealer after stuff like this comes to light.

While researching on other sites, I came across this where victims of newer Volvos (say '99 on have even bigger problems with the ETMs since Volvo swithced suppliers from Germany to Italy. At least mine got to 125k miles (well, I can't confirm that since not the orig. owner, bought with 43k miles, I hope no OD rollback, fuzzy stuff producing a title as different states involved) but apparently they are only getting 10-20k miles for their $1,000 dealer repair. This really is a defect to me. And a "life threatening" one to boot. Should be a recall. I will be sending letter to Volva of America or should I just send it to Ford now? ; )

http://www.v70xc.com/forums/showthread. ... #post47755 "

Guest · Post by **Guest** » 29 Apr 2005, 14:34

Hmm... Now I'm confused. According to this expert the EMT can't possiblty be the decelerating/coasting/stopping stalling cause problem in a '94 850 because they didn't start using them till '99 S70? Can anyone clarify?

http://volvospeed.com/vs_forum/index.ph ... opic=21451

Post by **matthew1** » 29 Apr 2005, 16:33

A note to Guest and anyone putting a URLs in posts:

Because long URLS blow out the page margins, I'm asking that you remove the unnecessary pieces of URLs.

For this forum this means removing these:
&sid=23363da9eaf0dd2a0d6425c3d1156b1f

For Volvospeed URLs this means removing these: s=010a4ee847989707172eacb51c8ff86a&

Thanks!

Guest · Post by **Guest** » 30 Apr 2005, 13:07

Guest wrote:Hmm... Now I'm confused. According to this expert the EMT can't possiblty be the decelerating/coasting/stopping stalling cause problem in a '94 850 because they didn't start using them till '99 S70? Can anyone clarify?

http://volvospeed.com/vs_forum/index.ph ... opic=21451

Well, apparently it still is the problem even for the older ones but not as often according to this:

https://www.matthewsvolvosite.com/chat/p ... php?t=3729

Thanks again WhiteTurbo, will report back how this goes.