Question about 2002 Mazda MPV
I used my buddy's OBDII tester and it pulled p0303 and p0174 codes.
#3 misfire / lean bank 2
I've changed the plugs/wires/coil. I suspected it was the coil as I pulled #3 wire at the coil and while the engine was at idle there was no spark and no change in engine idle. I pulled all the other wires and there was spark on 1/2/5/6. #4 wire had no spark also at idle. I am going to put the stock coil back in to check and see if there is a difference.
As for the lean bank 2 code, I replaced the upper intake gasket. I didn't change the lower [and I know I may have to] but I just wanted to see if there would be a difference and there is still no change in engine. I sprayed carb/throttle cleaner around all areas and I didn't see/hear any vacuum leaks or change in engine rev.
As for the PCV hose, I changed that last year.
I'm just stumped that there is no spark in #3 and #4 at the coil. I even revved the motor thinking there would be some spark at higher rev but no go.
I ran across a thread about a defective crank angle sensor. I'm wondering if this could be possible. My other buddy said it could be dirty O2 sensors.
Also I took the crank angle sensor off and cleaned it and the connector. I started up and no difference. I also checked #3 and #4 at the coil and still no spark at idle or rev. I even switched both spark plug cables at the coil and no difference in engine run.
ANY SUGGESTIONS? Please Help!
This could be a bad fuel injector. Lean implies low fuel to the cylinder which will cause a misfire.
Posted on Feb 01, 2009
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Jan 18, 2014 | 2004 Hyundai Tiburon GT V6
Dec 28, 2010 | 1992 Ford Ranger
Sep 28, 2010 | 1999 Ford Taurus
Aug 24, 2010 | 2000 BMW 3 Series
May 11, 2010 | 2003 Ford Ranger Regular Cab
Jan 10, 2010 | 2003 Mazda MPV
Mar 02, 2009 | 2000 Ford Windstar
Feb 01, 2009 | 2002 Mazda MPV
Sep 14, 2008 | 2001 Ford Taurus
531 people viewed this question
Usually answered in minutes!