02 V70 2.4l Turbo rough idle when warm. Help.

[LuvH8VolvoRelations]

Starts acting up after reaching normal operating temp??

It has 153k miles, when u first start it up for the day it’ drives like new.

It takes about 25 minutes of stop and go driving until it reaches the middle on the temp gauge and then the problems start and continue to for the rest of the day until the next morning

Only In D or R n At a stop the Idle stays at 7-800 and doesn’t dip but u can feel the car dip randomly (like A/C turns on) and it’ll progressively get worse and the when letting off the brake it’ll start studdering forward.

Once that starts it’ll have random moments when it either won’t shift into gear without letting off or when the RPMs are much higher than usual. At this point you can feel the difference between going from P to D n R and is a lot harder then normal.

There was a p0305 misfire code at one point, and a p0234 wastegate solenoid code. So I’ve changed the plugs to the best NGK (gap 2 spec) and installed-at torque. Replaced the coils. Cleaned the grounds. Installed a new turbo control valve with new hose to the wastegate. Cleaned the MAF and unplugged to check if that was it. Couldn’t find any vacuum leaks and finally spent a couple hours removing and cleaning the ETM which looked new with a contactless TPS. Every time I’ve done one of those repairs or cleaning it seems to run good for a couple miles and then goes right back to running like crap. I haven’t changed the PCV yet cuz not only is it a pain in the arse but I don’t have a complete kit to replace the gaskets of everything on the way to it.

I’d like some advice on things I can do before changing the PCV. Im not a mechanic and don’t have advanced equipment or knowledge to get too technical about it and can’t afford let alone trust a local mechanic so any help would be appreciated.

Also I was told I can get the software update and I would if I absolutely new that was the problem or if it was a constant thing and not only when it’s at normal operating temp.

[ignatz]

It should take about 5-6 miles, 7 to 10 minutes to reach center on your temperature gauge. Not 25 minutes.
I would replace the thermostat and temperature sensor beside it while your in there. At least replace the thermostat and use correct Volvo replacement parts.

[MDK]

I concur with ignatz..

[Jonboy74]

Agree that it should not take that long to get up to temp - it literally only takes a few minutes of driving for mine to get up to temp (I have the exact same vehicle year and engine with turbo).

Also, have a look at my thread, and the subsequent threads that followed. Are you SURE you don't have a leak in your evap and turbo lines, or your intake? I had to replace my vacuum lines and my evap lines, as well as my intake with the PTC valve.

The situation I had was my engine literally dying when trying to pull out in traffic after it got warmed up. It was (mostly) fine if I got in it and drove it from cold, but if I stopped and parked for a few minutes, I would have serious trouble getting it going again. What I thought was an O2 sensor (based on the generic engine code) ended up being leaks in the vacuum and evap lines....and a self-induced leak in the intake hose between the MAF and the Turbo because I pulled the PTC valve out for some reason when I was working on it previously (big mistake).

Some of this post talks about VIDA and fuel trms - if you don't have VIDA, don't sweat that, just move on past it. I believe the meat of my issues might be helpful to you given the age of your car. Most of what I ultimately did you should be able to relatively easily and somewhat relatively inexpensively do yourself. I will caution that if you end up having to replace the air intake with the PTC valve, that one can be a beast to get back onto the Turbo inlet...however, some silicone and a hairdryer on the plastic help tremendously.

V70 2.4T (P2) ECM-262A (P2097) -upper O2 sensor? -nope! Vacuum & Evap leak!

Hope this helps!

Jonboy