Rich fuel

nORDX · Post by **nORDX** » 23 Apr 2007, 18:44

If rich fuel has been running through my car for a long period of time say 4 months, which is now corrected are there any sensors or other devices that I should consider cleaning or even replacing, even though no error codes are coming up.

As the car is still running a little ruff.

So far the spark plugs are new and unrelated the cat is new.

The MAF was my problem.

How about the O2 sensor for example could it get dirty?

Thanks

Post by **MadeInJapan** » 23 Apr 2007, 18:52

02 would get so hot that it would not require cleaning. I would just run it good and hard, getting it up to temperature for a good bit. Not having any codes is a good sign. If anything, clean the throttle body and plugs, or replace the plugs.

nORDX · Post by **nORDX** » 23 Apr 2007, 22:45

Okay I don't think its the O2 sensor I managed to get my OBD II to perform that check and it passed with no errors, however even after driving with the scanner connected it still will not perform the Catalyst Monitor and Evaporative System Monitor.

Any one know how far you need to drive or engine temp required to get these monitored?

I'll drive it to work tomorrow with it connected see what happens.

Post by **MadeInJapan** » 24 Apr 2007, 05:04

Are you talking about "readiness?" Are you saying that the scan is showing that these are not "ready?" If this makes any sense, there is an amount to drive for these systems to be "ready" in order to pass emissions testing. Let me know if this is what you mean and I'll dig out that info for you.

nORDX · Post by **nORDX** » 28 Apr 2007, 11:28

Sorry for delay in reply I have been out of town. Yes I mean readiness.

Post by **MadeInJapan** » 28 Apr 2007, 14:23

I copied this from another site for your vehicle....seems that most Volvo's require the same readiness procedure....anyway, what year is your car?

Start with the vehicle cool, below 122 degrees F.
Turn off the air conditioning.
Select a location where the driving can be done without violating traffic laws and you can
stop safely at the side of the road.

1. Start the engine and accelerate to approximately 1500-2000 rpm.
2. Drive for 6 minutes at 1500-2000 rpm.
3. Stop the vehicle and remain at idle in drive for 70 seconds.
4. Accelerate to at least 45mph and drive for 5 minutes at 1800-2200 rpm.
5. Stop the vehicle and remain at idle in drive for 60 seconds.
6. Accelerate to at least 45 mph and drive for 4 minutes at 1800-2200 rpm.
7. Stop the vehicle and remain at idle in drive for 60 seconds.
8. Park the vehicle and turn off the engine.

This procedure must be performed TWICE from a cold start to set the readiness codes.