1991 740 Volvo automatic sedan stalling problems

[backpackturtle]

I have a 1991 740 Volvo sedan with intermittent stalling problems. It stalls in cold and
wet weather. I have had the distributor cap changed as well as new spark plugs.
I have also changed the fuel filter and the fuel relay. I am running out of options and am very frustrated as this is my only vehicle. I recently had a new crank sensor installed and
it stalled after that was put in. I thought I had the problem solved.
The car has about 340,000 kms on the engine. The coil was also replaced.

Hoping someone can help.

[wojeepster]

check the hose that runs from the fuel pressure regulator to the small brass tube behind the throttle body. My hose was leaking and my car would stall when I pulled up to a stop sign.

also you could clean idle air motor and throttle body. Is your throttle position sensor making an audible click when you close the throttle (it should) Should click just when throttle closes completely.

[girlbunny]

I have an idea. However, this is based on experience with a manual non-Volvo vehicle, and thus may not apply... however, it could be worth checking out, just in case

My previous vehicle was a little '85 Holden Gemini. Overall, she ran well, especially considering the harsh treatment previous owners had subjected her to! However, in the wet, she ran like a dog. A dying dog at that. Honestly, it didn't need to be fully wet either. Fog would do it. She'd run sweetly, and as soon as we slipped into a dip that contained fog, it was as though someone had taken all the power away. Now... she didn't always stall, many times it was just a lack of power. At one stage, mid-way through a 620+mile trip, very early in the morning, going through deserted mountainous terrain, I hit fog. Even with my foot planted, whether going uphill, or flat, the maximum speed I could coax out of her was a whopping 25mph. Thank heavens for sunrise dissipating the fog! However, I'm missing my own point here. I found that the reason the car was losing power, and also stalling in the wet, was the electrics. Several cables had lost their waterproof casing in areas and were exposed. Every time moisture hit the wiring, the electrics would suddenly play haywire with the system.

Now, as of last week, I am aware of exactly what a Volvo does when it almost completely loses it's electrics. There was a massive lightning storm which actually managed to wipe the electrics on the car totally. No windows, no lights, no wipers... nothing. Well... nothing bar the lights in the dashboard. I'm working on the presumption that those lights likely get their power direct from the battery. My car didn't stall in that particular circumstance. I do figure that completely losing the electrics may not have the same reaction as a 'short' in the system though. So, I could be blowing smoke out of a certain rear orifice However, on the very off chance that it could be an issue, perhaps taking a look could be in order? Just a thought anyway.

Sam