I have myself an 96 850 Turbo. When the summer comes and it is hot outside the motor wants to stall its not right away only when driving for a little while and the motor is up to temp. If I keep my foot on the gas it will stay running and the problem goes away for a little while. I only notice this problem when its idling and hot. The check engine light is on sometimes and goes away after a week or so and then decides to come on again later.

What do you think the problem is? I was thinking a cracked vacuum line or multiple lines. How would I check for this? Also I don't have a diagnostics tool to check this.

My wife is complaining about this because she is using it as her daily driver and is scared to take it out incase it wants to stall again. So I would like to fix this problem within the next week or so.

(IMG:http://i22.photobucket.com/albums/b343/Scirocco20v/DSC03171.jpg)

Here is a picture of a hose I found disconnected. Its near turbo. I was wondering if this could be the problem. Im going to clamp it back on and see if I still have the problem. What is this vacuum line for?

Kevin

If that doesn't fix the problem it should more than likely be one of two things. The Fuel Pump Relay went bad and you can do a search for how to fix it on this forum. Number two it could be the Camshaft Position Sensor (CMP) Both are less than 100 dollars and I would try number 1 first, but if you get the codes checked it would tell you if it was number two. If it isn't either of those than we will go from there. This sounds like an easy fix that I and many others have went through.

Another thing. The relay is under the fuse box you will have to remove 4 screws and its pink on color labeled 103. The cmp sensor is that round black piece in the top left of your picture with 2 screws holding it on on the side of the engine. It does not have any gasket holding it there.

Just to clarify this only happens when its hot and during the winter we have no problems at all.

I think your right that this is the problem. But I just wanted to make sure.

Also where can I get the cam position sensor for under $100 I look around and it was being listed for $200?

Thanks,

Kevin

Put the vacuum hose back on. I believe thats from the wastegate.

Has been done :)

Still needing to fix my car though. Still stalling when the weather is hot.

Haven't tried any of the suggestions it was Canada day so the stores were closed.

Kevin

I have the same issue with mine as well, but mine does it all year round i have been through the whole fuel system except for the fuel pump relay and the fuel injector pump ( injector pressure is good at this time) so sounds like it is fuel pump relay which is located in the fuse box... you have to tak the fuse box cover to access it and cost' between 71.00 up to pp.oo usd depending on location

I just went and talked to a mechanic that I know. Told him everything he said its probebly camshaft position sensor because its heat related. Im still going to try fuel pump relay also because its not that expensive.

Kevin

I think importec.com has it cheapest.

not sure if you tried fcpgroton.com

The CMP sensor is a logical choice, but not because its heat related.

In anycase, hope you find the trouble.

The problem is categorised as a hot-starting issue, but the possibilities include even the lamest clogged air filter to the more serious ones. Sometimes, a weak ignition coil can also be associated with this.

BTW, i hope your Stage 0 parts are good.
:)

Car is fixed. I talked to some people for more input and suggestions including some mechanic friends. My friends suggested it probably is the ignition control module because of it being heat related and electrical. I did some tests by running cold water on the ignition control module for an hour while the car was running. I came to the conclusion that this was the problem because the car didn't stall while the ignition control module was being cooled down.

Kevin

If you dont want the car to stall while getting to the parts store, you can just soak a piece of thick cloth (used towels are good, but cut it smaller) with iced water and wrap the coil. That should help.

My 95 volvo 850 has exactly same problem. It stall seriously in hot summer and AC on. I had already replace igition coil 3 years ago and I suppose it should not going bad so fast.... But I will try to 'cool down' the coil while it happens. Thanks all your nice guys provide so useful information.

If you have lambda lights coming up, you should read what the error says first.

my lambda light is off.....
I found a CPU cooling fan and heat sink that might able to cool down my coil.... I will trying it once I have time...

Pondered with that idea before, especially for the radiator way up front. So that the fan could be started even during idling.

Point is, you need to find a real strong plastic fan to fit there, lest it melts.

The heatsink can be used, as it just attaches, but the fan...Hmmm.

The better solution is prolly to just REPLACE the coil. But you've gone that way, eh?
:)

Hey bear I had an idea for a mod concerning those of you who want a cooling fan for the ecu box like on the 93. seems simple enough that you could get a computer fan, one with a filter (they are available) and integrate it into the box. They are designed to withstand high heat, just not water, but if done correctly you wouldn't have to worry about water anyway. What do you think? Want to try it?