Hi all, I did a google search and found this site, I have a 94 850 turbo wagon and has an intermitten stalling problem.

When it stalls, it is usually within 2 miles down the road after starting the car. It doesnt matter if it is 70 mph down the highway, or stopped at a light. It has done when it is warmed up as well as cold. There is no other pattern other than it will usually start back up within a minute or two. Then it is fine for a long time. It has been happening about 2 times a day now.

I have replaced the Cam Position Senser, and the Fuel Filter, cleaned out the intake and the prob is still there.

Any suggestions will be appreciated as my wife wants to have her car back! She loves it!

Thanks all :grin:
Darrin

Darrin,

What about fuel system? Or the MAF sensor?

I think that is something in the fuel system, because when it starts, it acts like it is floded.

What I did today is looked for the fuel pump relay. I think I found it but am not shure, I looked in the fuse box under the hood, and removed the whole cover, instead of just the fuse cover. There were some relay's in there.

Is that where the fuel punp relay is? One of the relays was loose and sitting in there crooked. so I reseated it in its socket. I am hoping that I sumbled on to the problem. It didn't stall anytime after that yet. I will give it a couple more days.

Thanks for your input!
Darrin

That could very well have been it.

Yupp, hope that's pretty much it!

:thumbsup:

Not so fast,...It stalled on me today, only once, and it started right up. Before it would take 2 to 4 minutes of on and off cranking. I will drive it over the weekend and probablly switch relay's on Sunday when I have the time to mess with it.

We will keep plugging long with it,...

Thanks,
Darrin

You spend $2,200 on a car and then you have to work on it,... :thumbsup:

If you want to continue messing with the car, try this:-

Solder / Weld the metal connections to the relay, so that there won't be any more cases in the future.
:)

Thanks for the tip, I will have to look onto it more this weekend, it is still stalling so I haven't figured it out yet.

I also want to switch the relay's around and see if the problem still exists or follows the realy, that will let me know if it is the relay, socket, or something else.

More to come,....

Darrin

Also, if you could and have some time, browse through the past postings in here, and look for a similar case, and see what more you could check out by yourself.

:)

Bear, I did some searches and came didn't come up with anything definate. Tonight I swiched the fuel pump relay with the one next to it, and will be driving it again tomorrow. We will see what happens and go from there.

By the way, my 850 looks exactlyl like yours, same color, rims etc. Real nice looking car you got there! :thumbsup:


Darrin

Thanks!

So, how's your car going on...?

I had a very similar problem with a 960 turbo. The problem was caused by a split in the main hose between the air filter and the torbo (sounds daft) but the net result is that the air flow sensors get bad readings due to lack of vacuum. Check around for any possible air leaks or loose hoses in that area.
If it is the same as the 960 there is a smaller hose that branches off to a sensor on the other side of the engine which should also be inspected.
I have also been told that the sensor at the end of the smaller hose can get gunged up and cause the same problem.

I will check that also, Thanks,

Well after switching the fuel pump realy with the one next to it, it has not stalled since, IT has been 4 day! Before it would do it twice a day. So heres hoping that it was the problem.

Now my questions is what to the other relay's run that sit on either side of the fuel pump relay? I assume that I should replace it if it is weak, and it probablly will give me a problem sonewhere else.

For now my wife is driving her Volvo again and is very happy,....Happy WIfe, Happy Like!

Thanks
Darrin

:grin:

Or rather, Happy Wife, Happy Life!
"Volvo For WIFE!!!"






Ehem. In anycase, no need to change things if they are not bad. Unless of course, it is more convenient for you to do so, of course.

Hi. I am new to the site and I was reading your postings and the replies. I have the same stalling issue with my '93 850 GLT. I am ready to sell it for parts because I cannot figure out why it is stalling. Did the relay replacement fix your stalling issue? I will look at mine tomorrow and hopefully it is the same problem and I can get it fixed. I love my car and hate to get rid of it, but I am so darn frustrated with the stalling thing I could scream! Please let me know soonest if this did fix the stalling problem. Thanks a billion for your posts. Save the VOLVO!

Ah, yes. The old "Fuel Pump Controller" problem. Look up my posts from a few weeks ago. Problems sound very similar. When you turn the key on you should hear the fuel pump operate for a few 5 seconds or more. It will stop after a bit (mine was stopping after 1/2 a second, way too soon). The system should at that point have full fuel pressure. Start the car. You should hear the pump (go back to the trunk, put your ear to the mat on the right side, near the back seats). If you don't then the car will not run long (like my car's problem).

Hook up a fuel pressure guage if you have one (or have access to one). It should be pretty near 40 when the car is running. If it is less than that you could have a bad fuel pump regulator, that little round thing attached to the fuel rail near where the fuel lines attach. This might cause you some problems if the pressure is lower than normal. (The car would have other problems, like loping at idle, if the air hose to the regulator was bad.) If it has much more than 40 then you have a bad regulator and might blow out something else, like an injector? I'm not sure of what could happen in this case. Anyone else know?

You could get wild and take the cover off the fuel pump controller and check the solder joints -- saved me $50 when I resoldered a few joints and get my 850 working again.

:grin: