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Car Forum / Volvo Cars / September 2005volvo 850 stalls
We have a 1993 Volvo 850 that once every two weeks or so... just stalls. It happens at any time..... but usually when we are driving it... with foot on throttle. After stalling, all dash lights are on... and the car restarts everytime. The fuel pump in the tank was recently replaced but did not fix the problem. Any ideas? Much thanks in advance!! JP > We have a 1993 Volvo 850 that once every two weeks or so... just stalls. > It happens at any time..... but usually when we are driving it... with [quoted text clipped - 6 lines] > > JP No "check engine" light, I assume? Does the engine quit instantaneously like you turned off the ignition or does it fade over a half second or so like you'd lifted your foot from the throttle? Mike > No "check engine" light, I assume? Does the engine quit instantaneously > like you turned off the ignition or does it fade over a half second or so > like you'd lifted your foot from the throttle? It just quits as though the key is turned off and the is no check engine light activity at all while the engine is running. >> No "check engine" light, I assume? Does the engine quit instantaneously >> like you turned off the ignition or does it fade over a half second or so >> like you'd lifted your foot from the throttle? > > It just quits as though the key is turned off and the is no check engine > light activity at all while the engine is running. The sudden shut-down points to an electrical/electronic failure rather than the fuel pump quitting or other fuel delivery problem, which tend to fade away as the fuel pressure drops. The lack of a "check engine" light suggests the system thought it was doing the right thing, which leads us to things like intermittent ignition switches rather than intermittent crank angle sensors... but that part is still not something you can hang your hat on. Mike > >> No "check engine" light, I assume? Does the engine quit instantaneously > >> like you turned off the ignition or does it fade over a half second or so [quoted text clipped - 11 lines] > > Mike I don't want to steer you in the wrong direction, but my '98 S70 just had the same problem. Sometime after driving for at least 30 minutes, the car would stall, but immediately restart. Because I have a '98 V70 as well (I bought the S70 to match the V70 exactly for this purpose, do I know Volvos or what?) I started swapping parts. First 3 attempts (fuel pump relay, crank position sensor, ignition coil) left the S70 still stalling. Fourth attempt was air mass meter, and then the V70 stalled. Never before have I been happy to have my car stall on me. Also, like you, no activity from the check engine light.  SignatureMike F. Thornhill (near Toronto), Ont. Replace tt with t (twice!) and remove parentheses to email me directly. (But I check the newsgroup more often than this email address.) The 850's have piss poor switch for the ignition and its quite common for these to fail in the way you describe. I had too many keys and the weight of them rocking with the motion of the car was enough to turn the switch off. I believe its quite easy to replace the contacts in the switch, so something you can do yourself. Try www.volvospeed.com Its a very good web site and shows how its done. ttfn.....Alistair >> >> No "check engine" light, I assume? Does the engine quit >> >> instantaneously [quoted text clipped - 26 lines] > stalled. Never before have I been happy to have my car stall on me. > Also, like you, no activity from the check engine light. Hi, having same problem with my '94 850 turbo. Dealer change sensor and cleaned the throttle body. 3 weeks later same thing happened to me. too it back to the Dealer and now they are saying it is the front and rear knock sensor thats causing the car to shut down. Do you think this is correct or maybe mine is the ignition also? Please I need urgent help????? >The 850's have piss poor switch for the ignition and its quite common for >these to fail in the way you describe. I had too many keys and the weight of [quoted text clipped - 10 lines] >> stalled. Never before have I been happy to have my car stall on me. >> Also, like you, no activity from the check engine light. also, my check engine light is coming on periodically.... >Hi, having same problem with my '94 850 turbo. Dealer change sensor and >cleaned the throttle body. 3 weeks later same thing happened to me. too it [quoted text clipped - 9 lines] >>> stalled. Never before have I been happy to have my car stall on me. >>> Also, like you, no activity from the check engine light.
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