Thanks for your input "Andy for help" and "precopster".

The low fuel pressure only occurs 20 sec after cold start while still in my driveway. It is an intermittent problem. The engine stalls due to too lean. After restarting the engine, the problem disappears for the rest of the day. I had a ...

I have also experienced the sudden catastrophic exhaust valve failure twice separated by 40,000 miles in the same engine but different cylinders. The engine is a 2.4L Model B5244S6, PZEV, VIN Code “64” in my 2005 Volvo V70 wagon. Back in 2012 while driving about 60MPH for at least an hour on a main ...

Cleaned MAF sensor with CRC MAF cleaner. No improvement.

The MAF sensor seems to consist of what looks like a thermistor mounted in the air stream. I did not see any fine wires. I am not sure if this is a newer design since all MAF sensors I have seen had the fine wires.

Ordered new MAF sensor ...

DGM: I will try cleaning the MAF next week. Out of town currently.

jimmy57 : You may be looking at the first frame when you indicate low batt voltage as an issue. That frame is just before I started the engine. You can see the engine RPM is 0. The next frame is just after engine start and the VPWR ...

I am experiencing a cold start issue which I first noticed late last winter and thought I might get help here. The car is 2005 Volvo V70. The engine is a B5244S6 - 2.4 Liter - nonturbo.

The problem went away in the hot weather. It seems to have reappeared the last few days due to colder (high 40's ...