97 850 GLT, Stalls A LOT

Jrathburn17 · Post by **Jrathburn17** » 14 Feb 2011, 14:03

i recently had my radiator fixed by a friend and after driving it for about 20 min it began to hesitate at take offs and now its stalling around almost every corner, if i really really really ease off the gas and on the brake it stalls less but whenever the car falls under 1K rpm it pretty is much guaranteed it will stall. sometimes black smoke comes out of the exhaust but not often. my friends is now to busy to help me fix this problem and im trying to fix it for a little as possible.

i have a list of engine codes
PO442
PO410
PO108
PO243 -I just went to the junkyard and tried a different MAP sensor that was they had and it didnt fix the problem

What could be causing it to stall like this?

Please help me fix my car !!

Jrathburn17 · Post by **Jrathburn17** » 14 Feb 2011, 14:18

on the PO243 i meant MAF sensor, not MAP

Post by **JRL** » 14 Feb 2011, 14:20

Sorry, but since you had to capitalize your topic header,

you may want to read this and UNDERSTAND what it says
http://unenlightenedenglish.com/2009/04 ... t-vs-allot

(I promisedI would not correct anymore and I haven't but not inly did you put this in the topic header you bold faced it and made the alot IN CAPS

As for your problem, start addressing your codes, I'm sure once they're fixed your stalling will stop

ButeoPatch · Post by **ButeoPatch** » 04 Apr 2011, 20:54

Did you ever figure anything out with this issue?

I recently purchased a 1997 850 T5 wagon and I am having the same issues... it is periodic though which is throwing me off. Otherwise it runs awesome... I have not checked the codes yet though.

kcjones · Post by **kcjones** » 04 Apr 2011, 22:03

@ButeoPatch Try cleaning the PTC nipple. It's part of the PCV system and can help temporarily alleviate stalling/sputtering issues. While you're in there, consider cleaning the Idle Air Control valve and its hosing, along with the throttle body. My PCV system is on the fritz, but after doing this I've noticed a much smoother idle and less stalling.

https://www.matthewsvolvosite.com/forums ... =1&t=36184

ButeoPatch · Post by **ButeoPatch** » 05 Apr 2011, 23:21

Thank you kcjones. I will try what you suggested and see what happens. I am going to run a cycle of Seafoam as well... in the fuel and I will do about 6 oz through one of the vacuum lines.

I did pull the code and it is directing the problem to the MAF sensor. I tried cleaning it but do not have the torx security bits as of now so I cannot really get a thorough cleaning with a q-tip.
Since that is the only code being thrown I am guessing that is it... but I also realize that this code will also arise due to a dirty/faulty PCV system.
I will start with the easiest and most apparent (although a new Bosch air meter sensor is not cheap).

To add: I am getting a little bit of smoke but it is very minimal. If I accelerate hard or around 60mph after a shift it will spew out a small puff of smoke. I figure if this is the MAF sensor than it is just throwing off the air/fuel ratio and causing this to happen...

Post by **jblackburn** » 06 Apr 2011, 06:02

Since that is the only code being thrown I am guessing that is it... but I also realize that this code will also arise due to a dirty/faulty PCV system.

It won't throw a code for the MAF/O2 sensor unless there's a huge air leak (broken hose or something) somewhere. I think you have a bad MAF sensor.

Mine are just regular Torx T-25 screws; not security Torx.

ButeoPatch · Post by **ButeoPatch** » 06 Apr 2011, 11:36

Wonder why I have the security torx, annoying if you ask me... I do have a few bits for those but not that size. When I remove them I am going to replace them with regular torx screws.

More to add: Yesterday at a light the car stalled after it dropped below 1k rpm. I had the a/c system running on auto as well to see if it was only stalling when it was on. After starting the car back up and continuing on my drive I noticed the lights next to the recirculate switch and the auto a/c switch were flashing. I have not seen that warning anywhere in the manual.
Does anyone know what that means exactly?

I am going to clean the PTC and than perhaps replace the air meter with a new one... Everyone says to use Bosch since it is intended for these Volvos... Cheapest new one I found has been about $150, anyone find any cheaper? I would rather not go with a used one, and end up in the same boat in the near future.

Thanks again for all the help guys.. Much appreciated!

Post by **jblackburn** » 06 Apr 2011, 11:48

After starting the car back up and continuing on my drive I noticed the lights next to the recirculate switch and the auto a/c switch were flashing. I have not seen that warning anywhere in the manual.
Does anyone know what that means exactly?

The climate control is annoyed about something. For now, ignore it. Take a can of compressed air and blow out the temperature sensor vents in your grab handles above the front doors. Then see if the flashing lights return.

Price sounds about right for the MAF meter, though if you can get your hands on a used one, try that first before ordering an entirely new part.

ButeoPatch · Post by **ButeoPatch** » 06 Apr 2011, 15:44

Whoa! I pulled the intake tube off and removed the PTC... holy crap that thing was full of crud, I used an awl to poke through it and some sensor cleaner to get it thoroughly clean. It was pretty bad, pretty certain it had not been done in a long while, or ever for that matter.
Not sure if this is going to solve the issue but I still need to figure out the air meter, might try used like you said and see if it helps... good point, no sense in dropping $150 if I don't need to, especially with this economy..