GM Engine & Exhaust Performance EFI | GEN I/GEN II/GEN III/GEN IV Engines |Small Block | Big Block |

O2 Problem??? NEED SOME HELP!!!!!

Thread Tools
 
Search this Thread
 
Old Dec 28, 2008 | 10:41 PM
  #21  
Thread Starter
TECH Fanatic
iTrader: (5)
 
Joined: Nov 2008
Posts: 1,000
Likes: 0
From: Arkansas
Default

I reset everything this morning. I put about 150 miles on it today. Now I am just having codes P0101, P0154, and P0155.
Reply
Old Dec 28, 2008 | 10:44 PM
  #22  
GMCtrk's Avatar
TECH Senior Member
iTrader: (27)
 
Joined: Jul 2004
Posts: 12,275
Likes: 19
From: Dallas
Default

How does it drive?
Reply
Old Dec 28, 2008 | 10:52 PM
  #23  
Thread Starter
TECH Fanatic
iTrader: (5)
 
Joined: Nov 2008
Posts: 1,000
Likes: 0
From: Arkansas
Default

Originally Posted by GMCtrk
How does it drive?
When you are wide open, you can tell that it isn't 100%. Then it will all of a sudden have power for about 1/2 a second then bog back down again. I am also getting horrible gas mileage.
Reply
Old Dec 28, 2008 | 11:02 PM
  #24  
GMCtrk's Avatar
TECH Senior Member
iTrader: (27)
 
Joined: Jul 2004
Posts: 12,275
Likes: 19
From: Dallas
Default

Did you get a computer on there and check the A/F ratio?

Was the stock pcm changed for a different one when it was tuned or did the tuner tune your stock pcm?
Reply
Old Dec 28, 2008 | 11:08 PM
  #25  
1FastBrick's Avatar
Custm2500's Rude Friend
15 Year Member
Loved
Liked
Community Favorite
iTrader: (17)
 
Joined: Apr 2007
Posts: 14,596
Likes: 900
From: JunkYard
Default

did you unplug or plug in any of the conections while the Key was on??? That can cause a voltage spike and damage the components... Have you put another sensor on it???

Yes you can check the voltage and the resistance on the sensors, but I dont have any of that info in front of me right now...
Reply
Old Dec 29, 2008 | 11:09 AM
  #26  
Thread Starter
TECH Fanatic
iTrader: (5)
 
Joined: Nov 2008
Posts: 1,000
Likes: 0
From: Arkansas
Default

Originally Posted by GMCtrk
Did you get a computer on there and check the A/F ratio?

Was the stock pcm changed for a different one when it was tuned or did the tuner tune your stock pcm?
No. I just took it out and met him at my buddy's shop. He did everything there.
Originally Posted by 1FastBrick
did you unplug or plug in any of the conections while the Key was on??? That can cause a voltage spike and damage the components... Have you put another sensor on it???

Yes you can check the voltage and the resistance on the sensors, but I dont have any of that info in front of me right now...
No I did not unplug anything while the truck was on. I disconnected the ground, then installed the headers, then plugged everything back up, then reconnected the ground. And yes, it has brand new sensors on it now. I was getting P0134, P0135, P0154, P0155. After I put new ones on I am only getting P0154, and P0155.

I am going to check voltage and resistance later tonight. I wish I had a service manual to tell me what it is all supposed to read.
Reply
Old Dec 29, 2008 | 11:10 AM
  #27  
Thread Starter
TECH Fanatic
iTrader: (5)
 
Joined: Nov 2008
Posts: 1,000
Likes: 0
From: Arkansas
Default

Originally Posted by Jtbrewer19
I am going to check voltage and resistance later tonight. I wish I had a service manual to tell me what it is all supposed to read.
Does anyone have this info???
Reply
Old Dec 29, 2008 | 06:04 PM
  #28  
Thread Starter
TECH Fanatic
iTrader: (5)
 
Joined: Nov 2008
Posts: 1,000
Likes: 0
From: Arkansas
Default

I just hooked it up to a GM diagnostic reader. After warming the truck up, Bank 1 sensor 1 is only reading 35 at idle. Bank 2 sensor 1 is reading a little over 400 and appears to be working properly on screen. MAF was reading -27 degrees. So does anyone think that the MAF could be the problem?
Reply
Old Dec 29, 2008 | 06:05 PM
  #29  
Thread Starter
TECH Fanatic
iTrader: (5)
 
Joined: Nov 2008
Posts: 1,000
Likes: 0
From: Arkansas
Default

I just really want to get this figured out. I am really looking forward to installing the cam and converter. I just want to get this out of the way first.
Reply
Old Dec 29, 2008 | 11:59 PM
  #30  
1FastBrick's Avatar
Custm2500's Rude Friend
15 Year Member
Loved
Liked
Community Favorite
iTrader: (17)
 
Joined: Apr 2007
Posts: 14,596
Likes: 900
From: JunkYard
Default

Originally Posted by Jtbrewer19
I just hooked it up to a GM diagnostic reader. After warming the truck up, Bank 1 sensor 1 is only reading 35 at idle. Bank 2 sensor 1 is reading a little over 400 and appears to be working properly on screen. MAF was reading -27 degrees. So does anyone think that the MAF could be the problem?
35 what??? Sounds like it's lazy should switch back and forth like the other side...

and the MAF sounds like it needs to be replaced...
Reply



All times are GMT -5. The time now is 09:44 PM.