2003 Mazda 6i - engine cuts out

Reply

  #1  
Old 09-29-12, 06:36 PM
Member
Thread Starter
Join Date: Oct 2006
Location: USA
Posts: 16
2003 Mazda 6i - engine cuts out

My 2003 Mazda 6 that has a 2.7 liter 4 cylinder engine has a problem. It will be idling at 750 rpm very smoothly and will suddenly nearly die. It rarely dies all the way but the tach drops to near zero and then it will bounce back to a normal idle rpm. The only trouble code that has been trapped is a P0456, which is a very small leak in the EVAP system, but that has been around for quite some time.

I'm guessing that the problem might be a crankshaft sensor. Would appreciate hearing about other likely alternatives.

Thanks in advance for your help!

Mike
 
Sponsored Links
  #2  
Old 09-29-12, 10:14 PM
iceman681's Avatar
Member
Join Date: Jul 2012
Location: usa
Posts: 435
is it only at idle? if so id look for vacuum leaks, or bad idle air control valve. if not could be crank sensor, ignition system, or mass air flow.
 
  #3  
Old 09-30-12, 09:26 AM
ukrbyk's Avatar
Member
Join Date: Mar 2010
Location: USA/ Pacific NW
Posts: 3,208
toss in fuel pump, fuel regulator, and ECU.
 
  #4  
Old 09-30-12, 12:24 PM
Member
Thread Starter
Join Date: Oct 2006
Location: USA
Posts: 16
only happens at idle. there is no rough idle preceeding the sudden rpm decline. just falls off a cliff and just as quickly returns to a normal idle of 750 rpm.
 
  #5  
Old 09-30-12, 01:34 PM
ukrbyk's Avatar
Member
Join Date: Mar 2010
Location: USA/ Pacific NW
Posts: 3,208
that's why I am leaning towards fuel pump of fuel regulator. locate your fuel pump, should be underneath the rear seat, and clean all connections. ALL. same goes for fuel regulator.
also, run a can of decent cleaner through several tankfuls.
 
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
'