My '07 XC70 is throwing a P0442 code. I thought it might be the gas cap gasket, so replaced that first. No joy. My next thing to check is the purge valve. Where is the EVAP Vapor Canister Purge Valve (Volvo #8653908) located? I have the replacement already! (ANd I need to fix the code to pass emissi...

Link does not work for me because of a site issue.

I found the color waveforms earlier, in viewtopic.php?f=9&t=92716
If that was your ref.

Ok. Got the fuel pressure gauge. Attached to schraeder. No residual pressure before start. Crank motor. Goes up to 50+ psi, then settles to ~45 psi. DOES NOT HOLD PRESSURE. Leak down slow but noticeable. Might have been gauge connection but experienced assistant doubts it - no gas leak touchable. Vi...

Thanks for the parts diagram / Vida dump. Is #14 fastener used to fasten the #1 fuel line to #5 rail? Does #3 pipe go back to the tank? Dirty fuel? Hmmmm. I should be able to see that come out of the Schrader valve into a jar, no? My chassis is (1)261968 and has no fuel pressure damper fitted. I can...

Aha. Not near full lock counts this symptom out. Sorry for misleading.

Thank you to @cn90 and @abscate for the good words.
I will try to source the part from rockauto.com or a pick-and-pull.
I have to wait for the 17th to get funds$$$$ for this experiment.

As for the oscope readings, yikes!

I will put part number data in the title as soon as I have it.

I have a 2007 XC70 throwing a P0089 code. I have replaced the sensor on the fuel rail, and the fuel filter. I am in the middle of system component checkout and am looking for PEM diagnostics. I have googled and found nothing helpful. My PEM is in the spare tire well, so probably no corrosion issues....

There is a similar noise from a generic power steering pump. It is from the fluid cavitating. Do you know that you are not making this?

My first post to this forum.... I have a 2007 XC70 automatic, for which I am grateful, bought used with 165k miles. It needs its annual inspection. It is currently throwing a code after two starts or ~30 miles after CEL reset - (P0089) Fuel Pressure Regulator 1, which is an auto-fail. I have replace...