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Old 07-11-2005, 06:14 PM   #11
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You may find it easier to remove the MAF sensor for cleaning, rather than the MAF screen.
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Old 07-11-2005, 06:26 PM   #12
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OK went out at coffee and removed MAF Screen upper electrode and lower looked ok. Although the upper one was black looking and lower was more grey. Got some 99 proof rubbing alcohol and a qtip. Had a couple shots of the rubbing alcohol to calm my nerves LOL. The upper electode is now grey like the lower one lots of black particles came off of it. I also left the Screen out is this ok??? Seems to run fine at WOT no hesitation. Will the codes clear themselves or do I have to get them cleared? I did make an appointment for tomorrow am at the dealer should I get them to read the codes and clear and see howw that goes??

Just also wanted to say thanks to everyone for all the help CHEERS to all of you!!

Mark
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Old 07-11-2005, 06:36 PM   #13
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there is no REAL harm in removing the screen, mine is removed and i see no gain or harm.. Some people report a slightly rough idle with it out, but it all depends on the car and conditions.
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Old 07-11-2005, 06:53 PM   #14
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I had a similar problem as yours that developed after I had replaced the O2 sensor. At certain highway speeds, intermittently it would act as if the engine stopped. Letting off on the gas, or stepping on it harder got things moving again. Idle was occasionally rough (acted like it wanted to die, then engine would rev up before settling). This started about a month after I replaced it. No codes were thrown at the time, and I could find no cause for it until about a month after that I got the same codes you did. I asked for a warranty replacement for the O2 sensor,. Replacing the replacement cured the problem.
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Old 07-11-2005, 09:05 PM   #15
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I still believe you have an O2 problem. 2 of those codes had nothing to do with the MAF whatsoever. The MAF may have been part of your felt symptoms, but not those codes.
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Old 07-11-2005, 09:29 PM   #16
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Quote:
Originally Posted by willwren
I still believe you have an O2 problem. 2 of those codes had nothing to do with the MAF whatsoever. The MAF may have been part of your felt symptoms, but not those codes.
i agree 100% if you are throwing 2 O2 Sensor codes, you definately have a direct issue with the sensors or wiring to them
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Old 07-12-2005, 02:18 AM   #17
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Well I guess the only thing to do is to take it into the dealer and see what they tell me. Is there something I should ask them to do besides read the codes? It ran great all nght tonight and I did a ton of driving, but SES light is still on no hesitation at any red lights either. Do not get me wrong I did clean the MAF sensor like I was told by I think Foghorn and found some gunk on it but I have no clue if this fixed the problem. This is why I am here asking you the Experts and I greatly appreciate all of the help!!!!!!!! So what should I get them to check? My appointment is for 9:00 am. And once again THANKS!!!!!!!!

Mark
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Old 07-12-2005, 10:27 AM   #18
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Try one thing before you resort to going to the dealer and shelling out cash. Disconnect your battery for 30 minutes to clear the codes. If the light comes back on when you drive it, take it to the dealer then.
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Old 07-12-2005, 10:41 AM   #19
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Thanks for the response will I just cancelled the appointment and went out and disconected the battery. I thought that you could not clear codes on newer vehicles by doing this???

Mark
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Old 07-12-2005, 10:56 AM   #20
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Quote:
Originally Posted by mpich
So what should I get them to check?
As Willwren suggested, you could reset the PCM by disconnecting the battery for half an hour though I'm not sure if this will clear the codes. If it doesn't, go to the dealer and have them clear the codes with a Tech II.

What we want to see next is whether the codes you previously experienced will be set again.

An oil covered MAF is a funny situation, in that state it cannot read the airflow correctly and under reports the Grams/Second of airflow to the PCM. This situation does not set an SES light but causes a cascade of problems. The PCM commands fuel based on the air it thinks is enetering the cylinders, obviously this is picked up by the O2 sensor as being too lean but in all likelyhood the PCM is unable to add sufficient fuel (it can add up to 20%) to bring your Air/Fuel Ratio into line.

I've seen this problem a few times previously and when you look at the MAF it doesn't look dirty but it takes very oil to inhibit its' ability to read airflow.

If your car is performing better after the MAF cleaning then that'* great. But now you must make sure that was the problem and that it'* not something else. You must have the codes in the PCM cleared and pay attention that they are not set again. If they're not set...then you're all set ...but if they set again you'll have to dig deeper.

Hope it goes well.

Cheers,
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