96 850R Wagon - Won't stay running

DougM · Post by **DougM** » 30 May 2017, 06:10

Our 96 Volvo 850R wagon has been acting up the last few weeks. First it just took a little longer than normal to start. The garage had replace the fuel evaporation hoses, so I wondered if the additional pressure was messing with the fuel pump. Then last week I was driving it and it suddenly started stalling whenever I was slowing at a stop sign or to turn--basically anytime I was letting off the gas. CEL came on and indicated a misfire.

I replaced the plugs, wires, cap and rotor since I hadn't done that in the 4 years I've owned the car--and wasn't sure when the previous owner did either. Finished, got in, started right up. As I'm feeling proud, it just stopped running. Let it sit a little bit, and same thing--it will run fine for about 10 seconds and then just stop.

Any suggestions before I just take it to the garage?

Post by **tryingbe** » 30 May 2017, 06:53

Check engine codes?

Post by **erikv11** » 30 May 2017, 07:33

For stumbling under idle the first place to look is all vacuum lines, including the hoses for the intercooler. Other obvious and easy things to check are the fuel pump relay (strong suspect here, put in a jumper wire) and the MAF (unplug it before startup, see if it runs any better/differently).

DougM · Post by **DougM** » 30 May 2017, 07:56

No check engine codes appeared yet.

I will check the vacuum lines and hoses when I get home. Changing the rotor and cap required moving the air box, so it is possible that I messed something up.

Thanks for the ideas!!