sounds like 2 posibilities, fuel, or spark.... I would start with fuel pressure, guage up to the schraeder valve in the engine compartment drivers side at the end of the rail. I have to loosen the throttle cable pulley to get my guage in, but once your on the schraeder, you should get 43.5 PSI (850T ...

so I put the fuel pressure guage on last night prior to changing out the fuel filter.... no pressure "0" checked the relay, and checked for voltage at the fuel pump connection all checked out ok. I ordered a fuel pump this morning, we'll see if the old pump was weak, causing the 39psi. I agree ...

fuel pressure bleed's a bit from the 39 psi (not running) but only a psi or two when left for 15 mins. Do you think the 4-5psi mentioned would be a pump or fuel pressure regulator? would this cause the intermittent start? power is good when it runs.... I'm sourcing a fuel filter right now, as it can ...

Hi All, I'm a noob to volvo's and this site, but not new to cars. I have a 96 850T wagon, with 110k, that has an intermittent no start. Here is what I have checked so far:

fuel pressure - 39# at fuel rail
fuel pump - runs in key pos 1
sparks while cranking (held the coil wire to ground, spark is ...