Thread: Should I replace oxygen sensor?

OK - I'll save the 75 bucks and leave it be - thanks for the tip.

I used AC pro iridium plugs but I used AutoZone Duralast wires. After a little reading here, I'm concerned about the wires. Any thoughts? I don't mind switching to stock delco, I've go the time and money now to do it if it's worth it.

Funny you mention the throttle body - I had the "struggling to start" issue about 6 months ago which got me on this forum in the first place. Cleaned out the TB and worked like magic. Prob wouldn't hurt to re-check it though.

OK on the trans fluid. I read here that it would be a good idea. You suggest dexron 3 over 6 - I've seen 6 suggested? Will I need a new gasket or can I reuse the old one?

Thanks man.

Oh yeah - thanks for the MAF suggestion. I saw some MAF cleaner at O'Reilly's the other day and wondered if it was worth anything. So just spray it on the screen-like element in the intake?

Excellent. Thanks again.

Originally Posted by FriboRage

No, you'll wanna use the straw to direct the spray on the tiny little wire elements going across the center of the MAF.. I always thought it was easier to get it from the open side rather than the screen side. Soak it good and make sure it is 110% dry before you reconnect any wires. Take the MAF and throttle body off the car all together to clean them, so much easier.

That way you'll be able to get the TB with TB cleaner from both sides, and use a cloth to wipe down the plate and insides of the passage...

The MAF works by heating that wire to a very specific temp, the pcm monitors exactly how much power it takes to keep the wire at that temp as air flows over it and cools it, and that combined with the IAT input and the defined volume of the tubing is how the computer knows how much air is coming through the intake, so when crud gets on it over time, it can seriously change the MAF readings. That's also why you DO NOT want to touch those little wires with ANYTHING... only spray them and let them air dry.

I also got a long tire cleaner and wrapped some paper towels around it, soaked it in tb cleaner and used it to wipe clean inside the plenum opening as far in as I could get.

OK - I see what you mean. And thanks for the MAF explanation, I'd wondered how it worked.