Thanks in advance for any help! S70 NOT v70 . Posted in s70 thread too (desperate)

My S70 currently has 111,000 miles on it, was bought for previous original owner at around 85,000. They were an older couple who babied the car to my knowledge and took good care of it. My previous 94 850T had 0% taking off like a jet. With my v70 coming from a dead stop and accelerationg faster than normal I cant get above 4,000rpms. Once it hits 4k around 35mph it flutters between 3700 and 4100ish. Anyone know whats up? Volvo plugs replaced at 95500 and air filter is in good shape. Check engine is on and usually always is unless reset for inspection. Codes ive seen are its running too rich and front O2 censor. I dont plan on replacing the O2 censor. Care runs great otnerwise. Cleaned maf this summer.

 

Which O2 sensor is throwing a code, the front or back? The back sensor doesn't matter, but the front one makes a BIG difference in the way it runs. I would try unplugging the MAF while the car is off, and taking it for a spin. My V70 acted kind of funny like that when my old MAF went bad. If you can, try and post up the codes you are throwing.

 

How old are the wires? They have a date stamped on them.

Major tune up video:

 

Shiro, I unplugged the MAF last and it ran worse. So im guessing my MAF is still working (maybe not to its full potential though?) Im getting a front O2 sensor code. I wont have my scanner till tomorrow unfortunately, I will post codes then. Rspi, which wires are you referring too?

 

In your other post you said it was P0172. That isn't an O2 sensor code..

 

Yes, I mentioned im getting a front O2 sensor code also.

 

Spark plug wires. I'm assuming that the car is a '98 model.

 

I see '99 in another post. I'd go with OEM plugs and check coils. They may not have a lot of miles but are getting old.

You can also check compression to check the health of the motor.

 

If you want people to help, its best to provide all the information. Just telling one code does not tell the whole story.

I wouldn't replace the plugs and coils for that code.

 

So the codes are p1171 and p0102. I know the 0102 is maf related? Sorry for the confusion, it was a hectic weekend

 

How is your mpg?

I think, when the car won't rev high, one of the possibilities is that the engine doesn't gets enough oil at the oil pump - for some reason.

Does the top of the engine get very hot?

 

Could the MAF possibly be bad and is causing the fuel trim code? Also I erased the codes, when I went to leave work the car was running not so hot. I would step on the gas and it would hesitate then regain power and so on. After a few minutes the car returned to normal