DIY 1997 Volvo 850 Roll-Over Valve Hose Replacement

Roll Over Valve Hose Replacement -

The past few times I’ve tried to fill up the gas tank the pump keeps shutting off after just a few seconds, no matter how slow you try to pump in the fuel. It took me a while to finally get the tank full. This is new behavior for this car. As part of the diagnosis, I decided to check out the roll over valve to make sure that it was allowing the vapor from the tank to pass through to the charcoal canister during fueling.

CVVT – What They Do & Why

Cvvt Hub

The CVVT job — burn off environmentally bad gasses produced in the first minute or so from a cold engine. CVVT technology superseded fussy air pumps after it matured enough to be a dependable component of passenger cars. See Wikipedia’s CVVT page. See MVS’s how to change the CVVT hub on P2 Volvos. See all […]

Some P80s Are Exempt from Emissions Testing

Emissions testing: required for all Volvos made after the last ice age, right? Not for some 1993-2000 FWD/AWD Volvos. Volvo’s emission standards were too high on the P80 Volvos. Yes, too high. SonicAdventure: I have a 98 non turbo V70. Build date is 5/97. When I called the local Volvo dealer they said that my VIN […]

Which XC90 Should You Buy? 2.5T, 3.2, V8 or T6?

Which Engine XC90 Should You Buy

V8 – expensive long-term maintenance, thirsty 3.2 – weak (but durable) T6 – transmission time bombs 2.5T – durable, relatively efficient, my choice… but good XC90 2.5T samples are hard to find now 2007 XC90 V8 or 2013 XC90 3.2? Which XC90 To Buy post Interesting brief history of a MVS member buying and fixing […]

California Relaxes OBD-II Smog Test Readiness Requirements

MVS Forums Moderator abscate made an interesting post about OBD-II readiness states during state smog emissions testing. It turns out that recently (2015 for California) some states have relaxed their rules about passing/failing cars without all monitors in the readiness state. Yes, this is technical nerdery that can cause you (or used to cause you) […]

POLL: What Helps MPG?

Almost five years ago, MVS Contributor dan777 started a poll in the MVS forums and asked What Helps MPG? Almost 300 votes later across 30 poll choices, here are the MPG poll results… Everybody is trying to save gas those days, so would be nice to share what it helped increasing your MPG. Please choose […]

2006 XC70 Evap Pump Volvo Part

Volvo Parts Numbers Don’t Change… The numbers stay the same and the parts change. Check out Neil’s post about  a Volvo evap pump part #31392490 for his 2006 XC70: In my last post I asked if anyone could confirm that the part I purchased from Volvo was the correct part as it looked different to […]

VVIS Install Walkthrough – “Yitsbox”

Interested in the famous VVIS install on your non-turbo 850? MVS super contributor Neil shows us how he did it back in 2012. Availability of this VVIS mod is not certain, let’s start there. Another important fact is that it works on 1993 and 1994 N/A 20-valve 5-cylinder Volvos, unless you want to look at […]

The Birth, Life & Death of an XC90 T6

Ok, that title was a little dramatic, but that’s the idea. MVS member XVTer bought a 2004 XC90 T6 a few years ago for his wife. In between the buying date and selling date he posted some of the best tune-up, Stage 0 and restoration info for XC90s I’ve ever seen. This is his XC90 T6 story. […]

XC90 2.5T – Replacing Front O2 Sensor Step-by-Step

Need to replace your 5-cylinder XC90’s front O2 sensor? Use this nice XC90 O2 sensor DIY with clip connector info and photos. MVS Volvo Forum member joelq created this tutorial: The CEL on my 2004 XC90 with ~148k miles has been on with a P0134 code – “Oxygen O2 Sensor Circuit No Activity”. Pretty sure I’m […]

2001 XC70 J-Hose Replacement Fix w Photos

MVS Contributor Eric aka deepsouth posts a DIY tutorial on replacing the evap J-hose on a 2001 XC-70, including photos: “Recently changed the evap J-Hose on a 2001 Volvo XC70 AWD. I’ve changed evap hoses on all forms of S/V70’s and 850’s but this was a new form of hell. The charcoal canister is above the rear […]

MSD Ignition Coil Install Photos

MSD 8207 Blaster Ignition Coil installation photos from when I put this on my 1997 Volvo 850 T-5. There’s no gotchas or complexity here. If you can turn a wrench you can do this. This MSD has worked fine, no complaints at all. It’s a solid part of any Stage 0.