Congrats. But now the check engine light came back on LOL. I seriously think my car has a mind of its own and a screwed up sense of humor. The code we read last night was P0139

 

is it possible that you forgetting to plug the maf sensor in and starting the car is causing all these CELs? coincidentally, when i did that, my header gave out. just a thought.

 

The problems have started ever since I started the car without the maf sensor plugged in. But I don't have the stock header so no cat and nothing that could go bad. The cel said something about slow response from the o2 sensor or something to do with the spipe.

 

slow response means there is a leak or ur 02 on the spipe is loose i had the same problem... i tightend the 02 cleared the code.. boom never came back.. i would check that 02 out for looseness on the sensor area or the fouler...

 

^ that could also mean that either the o2 is bad or the maf isnt working correctly, right? think I read that somewhere

 

if his maf is ____ed.. and he is an 06 or less he is in luck and i have a spare maf sensor in my house.. if his 02 is fcked.. lol well he is just fcked cuz i cant really help him there

julian what u can also do is take out the bottom sensor and clean it up a bit.. it could have some carbon build up from not having any cats in anymore..

 

I'll get underneath the car now and try and figure that out. Are there any tests I can do to see if the 02 sensor or the maf sensor is bad?

Oh and for Jason and Johnny, I removed the vac line on the T fitting and took out the T fitting. I replaced it with the proper size straight fiting and hooked it back up. that tapping nose went away. The T fitting supplied looked way to think so its either that or where we tapped into. Im looking around for a bigger T fitting.

 

hmm... that might make sense cuz the T they used on Johnny's s/c is different than the one that came on mine. it didnt look like a perfect fit and they zip-tied the ends. so to be clear, right now your boost gauge is not hooked up, right?

o, ladies. i waxed my car yesterday with the new nxt wax. i f'in love it! highly recommend it. it goes on and buffs off easy and supposedly lasts twice as long as the first version. i did my whole car except my rear bumper and hatch. lol. didnt get around to it. but yea, meguiars ftw.

 

The boost gauge right now isn't hooked up. I just duct taped the vac line from the boost gauge to one of the hoses lol.

Pete, I just got underneath the car and everything seems alright....but im still knew to all this. I don't get how either the 02 sensor or the maf sensor could have gone bad by starting the car up without the maf sensor hooked up. It shut off immediately so i don't see how that damage could occur?

 

x2 on that.. i doubt its the maf about the o2.. it might be just dirty with carbon build up..

 

I don't know if this applies to you. But when I was talking to an engineer over at Innovative Motorsports.

He was explaining to me how a lot of the sensors are supersensitive.

For instance, he said if I have their wideband installed, but not hooked up, and turn on the car, it can severly damage the sensor. Something to do with it having to warm-up electrically, rather than the incoming hot exhaust gases. It got sort of technical, and I didn't have time to listen to his longgggg explanation on the matter ( I was still @ work!!! ).

So I don't think its far from possible, that it could have been damaged from having it installed and not hooked up. I'll try and see if I can look into it more. I only have a basic understanding of MAF sensors, as far as how it works electrically.

Or it could just be some build up, like pete stated lol.
I think somebody used WD40 to clean it, DON'T TAKE MY WORD FOR IT THOUGH. =)

I don't know if the WD40 damages it or not.

 

do not use wd40 for that... for simple carbon build up all u need to do it take out the sensor and wipe if off with a soft dry cloth.

i HIGHLY doubt though its his maf.. if it was.. the car would not be bale to hold idle and just die on him... i know that for a fact...i burned 1 once and i also had one pop out on me at the track...

im leaning more towards the o2

 

Hmm... yea your right about the MAF.
I haven't had one in a while
I forgot that bit of information, lol.

I wonder if the O2 sensors are under warranty?

 

just my two cents....and i feel like the electrical mood right now, lol


But the MAF and O2 essentially work hand in hand. One is input and the other output. So if you where to start the ECU (or the car) with a sensor not connected, the ECU then shuts off immediately and can maybe cause a sort in the MAF counterpart.....


Right??, or am i talkin outta my a$$?, lol

 

Also there is sensor cleaner.....i have some, lol

 

julian, for some reason, i doubt that it's carbon build up on ur spipe o2 sensor...u got the CEL right after you started the car w/o the MAF connected, so it must have something to do with that. i'm leaning towards more what geo said...maf could be fuked. myb if we never disconnected the maf to begin with and u got the CEL a couple days later then i'd go with carbon build up or say that ur o2 is dirty...but again, this happened while the maf was disconnected and it went downhill after that.

talk to pete...im sure he can lend u the spare maf that he has and u could probably try that out for a week and see if it comes back...if it doesnt, then there's ur solution.

 

Yea thats what I was thinking because all the problems started after we tried starting the car w/o the maf sensor in.
Pete, would you mind bringing the extra maf sensor you have on wed.?

 

yes ill take it... ill separate it tonight to take on wed. is ur car 06? even though i think his problem is elsewhere..

 

Yea its an 06', thanks.

 

k .. np