Most likely o2 sensor or Mas meter.

Changed o2 seonsor, and breather box. The car feels amazing. problem fixed.

I have 2 mas sensors with part# Bosch oem 0280212016 (3517020)

I used a standard jack, and stands. I took me a 4 hours, because of that, it was quite difficult. I am sure that if you use the crossbar or an engine lift, things will get easier to work under there. As far as changing the mounts removing brackets and stuff...Its not such a big deal. (careful with t...

matthew1 wrote:I put my sticker on my laptop. I needed the speed boost more with it than my 850 .

I have put an apple decal on top of the sony Vaio sign on my laptop, i noticed 50% increase in boost.

I replaced the breather box, flame trap, cleaned Mas sensor, and changed o2 sensor. Its a different car now. I have noticed increased horse power, and a free breathable engine. Running perfect.

Im having similar problems. Diagnostic box says MAS Meter and O2 senser. Went to junk yard, got an mas meter from a 740 Bosch 016 but when I got home the meters have same part number but they look different inside. Original Volvo ( In my car ) has a what it looks like a saxophone leed inside, and th...

IMHO you are still low in refrigerant. Id go to a shop and put more in with a regulator gauge. These old compressors you have to have the exact amount, not too low, not too much.

The guy answeared your first post.

Have you done an OBD self check for codes? step: 1 Obd check 2 Coalant temp senser 3 Air filter box flap door/ air temp sensor ( look into complete temp sensor delete for the air box ) 4 fuel filter 5 fuel pumps ( there are 2, one primary in tank and secondary outside under the car driver's side, us...