Help with that PO172 again

Reply

  #1  
Old 04-28-06, 11:17 AM
Member
Thread Starter
Join Date: Jan 2005
Location: usa, nc
Posts: 252
Help with that PO172 again

Thanks Guys....OK I found and cleaned the maf sensor located in the air breather assembly....Sprayed carb cleaner on it 3 or 4 times. Car still running very bad though, and a strong stinking smell of unburned gas coming from the exhaust. If i press the accelerator to the floor it sort of surges like it can't run at full throttle. Could the maf sensor be defective, if so how can i tell without buying a new one. Also checked for vacumn leaks, but could find none...By the way it is a 1998 pontiac grand am-se, with a 4 cylinder engine. Oren
 
Sponsored Links
  #2  
Old 04-28-06, 11:42 AM
Member
Join Date: Dec 2001
Posts: 2,538
if thats the only code you are getting you might have the exhuast checked for a restriction.
 
  #3  
Old 04-29-06, 06:04 AM
Member
Thread Starter
Join Date: Jan 2005
Location: usa, nc
Posts: 252
exhaust appears not to be blocked, lots of raw foul smelling gas coming out though. If the MAF sensor was defective would it cause this problem, thanks again....oren
 
  #4  
Old 04-30-06, 01:31 PM
Member
Join Date: Apr 2006
Posts: 21
MAF will definitely cause those symtoms.Make sure you have no leaks in the air filter assembly.I have found on GM MAFS,that it was not getting a good ground.Try finding a wire schematic and run a new ground to the MAF.
 
  #5  
Old 04-30-06, 06:09 PM
Member
Join Date: Dec 2001
Posts: 2,538
generaly it would set a maf sensor specific code if it was bad enough to cause the problems you describe. dont overlook the exhuast even if it does appear to be flowing ok an exhuast shop can check the backpressure on the exhuast system in about ten minutes.
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
Display Modes
'