MAF acting up causing all kinds of crazy stuff

[Spong]

Well I think there's something wrong with my MAF. I was driving to Kansas City last week and my check engine light came on. All the gauges looked ok and the gas cap was tight so I kept going. Got there and all the way home with the light on but it ran ok except the mileage was down.

Spoke to Alvin and he suggested cleaning the MAF since I have an air intake. I bought some CRC MAF cleaner took the intake all apart and cleaned the MAF. I left the battery unhooked for awhile to reset everything. Started the TB up and now it shifts so hard it feels like I'm getting rear ended and the check engine light came back on.

Alvin said if the MAF is throwing a code the computer will go to default and tell the tranny to have max line pressure.

Sooooo, I think I'm going to put my stock air intake back on and take it to the dealership and let them look at it. Hopefully it's the MAF and they replace it w/o any grief under warranty.

I'm starting to think that the more mods I do, the more problems I have! :suicide:

[bartonmd]

I'm starting to think that the more mods I do, the more problems I have! :suicide:


This is usually the case...

Sorry about your issues.

Mike

[Envoy Fan]

Well I think there's something wrong with my MAF.


I'm starting to think that the more mods I do, the more problems I have! :suicide:

I resemble that remark. :laugh:

Maybe an overdose of Zaino on your truck is the cause of your problem :undecided:p

[Spong]

Well I thought maybe it was something with the tune which is why I contacted Alvin. He suggested cleaning the MAF first just in case it was getting oil buildup from the air filter.

The hard shifting really had me puzzled but Alvin explained the default mode to me. Seriously, it shifts so f-n hard that you think someone rear ended you! Coming home last night driving in traffic, the 1-2 shift is so hard my headlight pattern jumps up on the car in front of me!

[stangcolts]

ummm, why don't you have the place where you bought the cleaner check the engine light, so that you know exactly what it is before you go down to the dealership.. ITS FREE

[Spong]

ummm, why don't you have the place where you bought the cleaner check the engine light, so that you know exactly what it is before you go down to the dealership.. ITS FREE


I've already had it diagnosed twice by Onstar and the code they are getting is for the MAF/air intake.

I'm only a year into my factory warranty so I'll let the dealership fix it. They've always been cool about mods on all my vehicles but I'm going to put the stock intake back on just to be safe.

[stangcolts]

sweet well let us know what happens.. Damn ON star best thing ever lol

[blktbz]

My neighboors Grand Am had all kind of problems when he put an oiled K&N filter on his car. The oil built up on the MAF, and messed with his tranny hard. He cleaned it, but it happened again. The simple (and only) fix is to get a normal paper filter.

[stangcolts]

well AEM is making a filter that flows like the KandN but is dry maybe something to look into.. no???

[Spong]

I've heard many times about people over oiling K&N filters. I've never cleaned my filter so it's still factory oiled.

I've put cold air intakes on almost every car I've ever owned and this is the first time I've had a problem.

I'm wondering if the MAF didn't maybe go bad? :undecided

[bartonmd]

I've heard many times about people over oiling K&N filters. I've never cleaned my filter so it's still factory oiled.

I've put cold air intakes on almost every car I've ever owned and this is the first time I've had a problem.

I'm wondering if the MAF didn't maybe go bad? :undecided

K&N's classically come over-oiled from the factory... That's probably your problem... or at least what started it...

Mike

[Spong]

K&N's classically come over-oiled from the factory... That's probably your problem... or at least what started it...

Mike

My filter actually isn't a K&N but it's a similar type. It's what came with my MAC intake. It's a green color. Funny thing is, it's been on almost 10k miles and just now I'm having this problem. Also, cleaning the MAF didn't help so I'm thinking something has gone bad.

[Nukedog]

FYI - Chevy sell CAI's so you can have one on your vehicle when it goes in for service and they can't say anything at all...

[ssilicon]

My neighboors Grand Am had all kind of problems when he put an oiled K&N filter on his car. The oil built up on the MAF, and messed with his tranny hard. He cleaned it, but it happened again. The simple (and only) fix is to get a normal paper filter.

That is exactly why I will never go back to an oiled filter. Bigger badder filter is good, as long as it isn't oiled.

[ssilicon]

FYI - Chevy sell CAI's so you can have one on your vehicle when it goes in for service and they can't say anything at all...

Got a link? And if it's so great why don't they just put it on as stock? Well, I probably know the answer to that but... it would be nice if it was stock! :D

[bartonmd]

Got a link? And if it's so great why don't they just put it on as stock? Well, I probably know the answer to that but... it would be nice if it was stock! :D

They don't put it on stock, because of your screen name... Silica, or "dirt" getting into the engine... Oiled foam filters flow lots of air, but they hurt the engine if you live in a dusty climate, or drive down gravel roads, by letting dirt pass through them and erode the inside of your engine, and get into your oil.

Mike

[PhillyAscender]

but have you cleared the code? or disconnected the battery terminal to reset the pcm for it to adjust to this new mod after you've cleaned the MAF?

Edit: I see you have disconnected the terminal. Perhaps it is the MAF sensor like someone said that started it. I've had K&N before, but no issues w/a MAF sensor code, just lower MPG. *shrug*

[Spong]

Yep, disconnected the battery TWICE after cleaning the MAF. In both cases, the first time I ran the engine after the SES light stayed off but the second time starting it the light comes back on. The hard shifting though is right away.

[PhillyAscender]

Yep, disconnected the battery TWICE after cleaning the MAF. In both cases, the first time I ran the engine after the SES light stayed off but the second time starting it the light comes back on. The hard shifting though is right away.

well, since that's the only code you get. I would say the problem is the MAF sensor if you've already confirmed that the air filter is NOT over oiled. The sensor in the MAF could've been damaged when it was cleaned. It is very sensitive. Sorry, if I can't help further. :no:

[Spong]

Well if the MAF is bad, it was probably bad before I cleaned it. I was very carefull to not touch anything inside the MAF and I used MAF specific spray cleaner.

[Nukedog]

Got a link? And if it's so great why don't they just put it on as stock? Well, I probably know the answer to that but... it would be nice if it was stock! :D

Sure do.

www.chevy.com
www.gmgoodwrench.com
www.google.com

:thumbsup:

[Nukedog]

This is what GM offers for a Silvy. They do not have one for a TB but these have NO effect on warranty...

http://www.gmaccessorieszone.com/index.php?id=133&tx_gmshopb2b_pi1[division_name]=Chevrolet&tx_gmshopb2b_pi1[vehicle_name]=Silverado&tx_gmshopb2b_pi1[year]=2008&tx_gmshopb2b_pi1[sub_product_group]=Performance%20Air%20Intake&tx_gmshopb2b_pi1[type]=gm

[Spong]

Update:

Well you guys aren't going to believe this. So tonight I go to reinstall the stock air intake because I've got an appointment Monday at the dealership.

Pop the hood and get ready to loosen the screws and notice the MAF IS UNPLUGGED! :duh::duh::duh:

I remember when reinstalling everything last week after cleaning the MAF, I had to unplug it again to align something with the heat shield. I guess I forgot to plug it back in. :duh: This would explain why it was instantly shifting hard the very first time I put it in gear but it wasn't doing this prior to cleaning the MAF.
So I let it sit with the battery unhooked for about 10-15 minutes, re-hook the battery and it drives like a dream, no more problems. :dielaugh:

I guess the problem was a dirty MAF after all. :yes:

[ssilicon]

They don't put it on stock, because of your screen name... Silica, or "dirt" getting into the engine... Oiled foam filters flow lots of air, but they hurt the engine if you live in a dusty climate, or drive down gravel roads, by letting dirt pass through them and erode the inside of your engine, and get into your oil.

Mike

Just curiour why no one seems to be able to undertsnad that you can form larger easier flowing filter into a cone shape from pleated paper. It really isn't all that hard from a manufacturing perspective. Hell they have made donut style ones for years and still do. Then you can have an intake, a larger (but still just as effective at filtering) filter and restrictive baffles removed. No worries about silica then, at least no more than with a rectangular filter made of pleated paper.

[ssilicon]

Sure do.

www.chevy.com
www.gmgoodwrench.com
www.google.com

:thumbsup:

I know those sites. I was hoping for something a little more specific. Thanks anayway.

[Nukedog]

The second post was a link to www.gmgoodwrench.com and check the accessories. Maybe you can handle that or do i need to walk you through it since you are having trouble thinking for yourself...

[Nukedog]

Even MORE help...

http://www.gmaccessorieszone.com/

Clcik Silvy since they do not offer one for the TB and you can see a picture.

[Spong]

Weel driving today and the f-n SES light came on again. :hissy: Looks like it's to the dealer on Monday again as scheduled.

[ssilicon]

The second post was a link to www.gmgoodwrench.com and check the accessories. Maybe you can handle that or do i need to walk you through it since you are having trouble thinking for yourself...

This is a site dedicated to Trailblazers and Envoys. This thread was about CAIs for a trailblazer. You posted in this thread that Chevy sells CAIs and that with one of those, there are no worries about warranty denials. Great!

I have never ever seen a CAI offered by Chevy for our Trailblazers, and I HAVE POKED AROUND PLENTY ON THE SITES YOU GAVE. So rather than be a self assured **** wad who doesn't know what he's talking about, (like some people), and say there taint no such thing, I asked for a link to where I could learn about such a product. Then you come back with main home pages for Chevy, Goodwrench and of course the very Trailblazer specific Google. I then say I was hoping for something more specific but thanks anyway, and you insult me?? You insult me and imply I am stupid? That's a laugh considering it isn't until after all of this do you think it MIGHT BE FRIGGIN RELEVANT TO MENTION THAT THE CHEVY CAIs YOU WERE TALKING ABOUT AREN'T EVEN MADE FOR THE TB! :duh:

[Spong]

So this afternoon I reinstall the stock air intake with all the stupid bulky plastic. I run to Lowes to pick something up and notice the SES light is now back off. WTF? :rolleyes:

Hopefully the dealer can find something tomorrow because I hate running the stock setup.

[Nukedog]

This is a site dedicated to Trailblazers and Envoys. This thread was about CAIs for a trailblazer. You posted in this thread that Chevy sells CAIs and that with one of those, there are no worries about warranty denials. Great!

I have never ever seen a CAI offered by Chevy for our Trailblazers, and I HAVE POKED AROUND PLENTY ON THE SITES YOU GAVE. So rather than be a self assured **** wad who doesn't know what he's talking about, (like some people), and say there taint no such thing, I asked for a link to where I could learn about such a product. Then you come back with main home pages for Chevy, Goodwrench and of course the very Trailblazer specific Google. I then say I was hoping for something more specific but thanks anyway, and you insult me?? You insult me and imply I am stupid? That's a laugh considering it isn't until after all of this do you think it MIGHT BE FRIGGIN RELEVANT TO MENTION THAT THE CHEVY CAIs YOU WERE TALKING ABOUT AREN'T EVEN MADE FOR THE TB! :duh:

Okay - NEWB - it was a reference to make things simple but maybe you aren't so smart??? A GM is a GM - got it? If they offer a CAI for a 5.3 Silvy (it is on the site) then YOU buying and installing one on you TB will NOT void anything and the dealer can;t say anything. You wanna say anything else about something you knw nothing of? I said many times it wasn;t for a TB - you are a dimwit - said and understood - not implied...

[puget]

I have experienced some of the same problems that you have described. Does anybody make a dry filter intake system for a 2007 gmc envoy with a 5.3 engine. Puget

[Spong]

I removed the MAC intake system and I've been running a K&N FIPK setup most of this year without any problems.

[bigredtank]

hey off topic but which do you like better? the Mac or k&n? and as far as sound and hp gain? which one helps you out betteR? im sorry this is off topic i was just reading through your post.

[Spong]

hey off topic but which do you like better? the Mac or k&n? and as far as sound and hp gain? which one helps you out betteR? im sorry this is off topic i was just reading through your post.


MAC had the best looks but overall, I think the K&N is the better. I haven't had a single problem since putting the K&N on. Alvin thought maybe the MAC flowed too much air, even with the tune.

[bigredtank]

yeah i was reading that too. i wanted to get my cai before i did my pcmforless so it all gets tuned at once but imma be blowin codes left and right i rather go with a k&n. plus like i was told, MAC looks great but at a carshow im pretty sure im not gonna be shoin off the i6 thats for damn sure! lol:bonk: