Login Register

96 850 NA misfires, hard start, stalls

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

Post Reply
User avatar
abscate
MVS Moderator
Posts: 35284
Joined: 17 February 2013
Year and Model: 99: V70s S70s,05 V70
Location: Port Jefferson Long Island NY
Has thanked: 1502 times
Been thanked: 3813 times

Re: 96 850 NA misfires, hard start, stalls

Post by abscate »

es. As an interesting aside, the evap code always tends to come on when I pass through one particular section of a town.
Fascinating observation. I doubt there is a mechanical link to your location but my guess is your driving habits are such that this location is the place your evap monitor drive cycle completes, hence popping the code. There are several conditions that will stop the cycle including speed over 100 kmh, full/empty tank, AC on, sudden throttle application.invomplete warm up, warm start.

..or its cognitive bias, which you can cleanse with some stuff you can buy from the Internet .....
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 XC90-in-Red
Link to Maintenance record thread

User avatar
eriscentro
Posts: 119
Joined: 12 December 2011
Year and Model: 96 850, 01 S60
Location: New Jersey

Post by eriscentro »

abscate wrote:
es. As an interesting aside, the evap code always tends to come on when I pass through one particular section of a town.
Fascinating observation. I doubt there is a mechanical link to your location but my guess is your driving habits are such that this location is the place your evap monitor drive cycle completes, hence popping the code. There are several conditions that will stop the cycle including speed over 100 kmh, full/empty tank, AC on, sudden throttle application.invomplete warm up, warm start.

..or its cognitive bias, which you can cleanse with some stuff you can buy from the Internet .....
Interesting, I had no idea what was involved with the test process. The light literally will stay off for over a thousand miles, but on the off chance that I'm in that area (a 25 mph, traffic infested, incredibly bumpy road) it always comes on. I'll clear the code immediately afterwards, but sure enough, whenever I pass by, it comes back. Next time I'm in the area, I'll put a little more thought into the conditions.

The P0442 could be related to a crack in one of the vent hoses coming out from the tank. When I fill it, a little bit of fuel streams from the top of the tank down past where the clamp is that links the tank to the filler neck. AT home, we determined that there was a crack in one of the hoses at the top of the tank (we literally saw fuel coming out of it), and the car was taken to a mechanic since dropping a full tank was out of the question and the car had to be fixed immediately. Seeing gas spill down from the top of the tank is quite a dreadful experience, imo a lot worse than the car stalling out.

Anyway, to make a long story short, the mechanic replaced the fuel pump and sender (a cool $750) in August, but a couple weeks ago I noticed the problem once again. My guess is the mechanic never changed the lines that caused the issue in the first place, and since I'm 500 miles from the mechanic most of the year, there's not a lot I can do about it. That's an annoying story for a different thread, though.

Post Reply
  • Similar Topics
    Replies
    Views
    Last post