Have you checked the camshaft position sensor and the wiring for it? I have an 94 850 NA that tries to stall at stop signs and red lights in humid or wet weather until I've been driving for about 15 minutes and I guess the wiring dries out. To prevent the car stalling in wet weather, I put the car i...

I have a 94 850 NA. I had similar symptoms until I cleaned the MAF sensor and its electrical connectors.

I've got a 1994 Volvo 850 NA with 130,000 miles (original owner) with the same problem. Car ran fine yesterday. This morning it won't start, dash lights come on, hear one click. Checked the codes. No A2 lights. All the others were fine (1-1-1). I read the posting by King of Cleveland where he solved...

Great photos and instructions. BUT....as a long time Volvo owner (83 240 GL and 94 850-original owner) and "newbie" at doing my own repairs on the 850, I find it very frustrating when posters of car repair information on the internet use initials and don't ever identify what the initials s...

Could be a bad fuel pump relay.

I saw a post somewhere about another sensor in the bottom of the Air Filter box that controls air flow or temperature (forget which),. but I've looked all over my Air Box and dont see any other sensors except the MAF on the top side. There IS something mounted on the engine side of the box about 6 ...

To update my response: A new fuel pump relay switch did fix the problem of stalling while idling. Removal of the air box thermostat and fixing the cold air intake into the open position had already fixed the dying while driving problem.

This one is really getting to me. 1999 S70 GLT/Auto. 163k miles. Just picked it up 6 weeks ago. Change plugs, coolant, thermostat, tranny fluid, oil, oil filter. Replaced the ABS module from Mid-West ABS (thanks, Matt). This car starts fine 1st thing in the morning. If I drive it for 30-45 minutes,...

About your check engine light - It may just be because you tried to start your engine with the MAF sensor disconnected. A similar situation happened to me last week. I have a 1994 850 (orginal owner, 130,000 miles). The check engine light has never come on before. Last week I disconnected the MAF se...